mirror of
https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
3545 lines
136 KiB
Python
3545 lines
136 KiB
Python
# SPDX-License-Identifier: ISC
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#
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# Author: Ulf Magnusson
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# https://github.com/ulfalizer/Kconfiglib
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# This is Kconfiglib, a Python library for scripting, debugging, and extracting
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# information from Kconfig-based configuration systems. To view the
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# documentation, run
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#
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# $ pydoc kconfiglib
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#
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# or, if you prefer HTML,
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#
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# $ pydoc -w kconfiglib
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#
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# The examples/ subdirectory contains examples, to be run with e.g.
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#
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# $ make scriptconfig SCRIPT=Kconfiglib/examples/print_tree.py
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#
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# Look in testsuite.py for the test suite.
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"""
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Kconfiglib is a Python library for scripting and extracting information from
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Kconfig-based configuration systems. Features include the following:
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- Symbol values and properties can be looked up and values assigned
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programmatically.
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- .config files can be read and written.
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- Expressions can be evaluated in the context of a Kconfig configuration.
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- Relations between symbols can be quickly determined, such as finding all
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symbols that reference a particular symbol.
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- Highly compatible with the scripts/kconfig/*conf utilities. The test suite
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automatically compares outputs between Kconfiglib and the C implementation
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for a large number of cases.
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For the Linux kernel, scripts are run using
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$ make scriptconfig [ARCH=<arch>] SCRIPT=<path to script> [SCRIPT_ARG=<arg>]
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Using the 'scriptconfig' target ensures that required environment variables
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(SRCARCH, ARCH, srctree, KERNELVERSION, etc.) are set up correctly.
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Scripts receive the name of the Kconfig file to load in sys.argv[1]. As of
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Linux 4.1.0-rc5, this is always "Kconfig" from the kernel top-level directory.
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If an argument is provided with SCRIPT_ARG, it appears as sys.argv[2].
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To get an interactive Python prompt with Kconfiglib preloaded and a Config
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object 'c' created, run
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$ make iscriptconfig [ARCH=<arch>]
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Kconfiglib supports both Python 2 and Python 3. For (i)scriptconfig, the Python
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interpreter to use can be passed in PYTHONCMD, which defaults to 'python'. PyPy
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works well too, and might give a nice speedup for long-running jobs.
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The examples/ directory contains short example scripts, which can be run with
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e.g.
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$ make scriptconfig SCRIPT=Kconfiglib/examples/print_tree.py
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or
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$ make scriptconfig SCRIPT=Kconfiglib/examples/help_grep.py SCRIPT_ARG=kernel
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testsuite.py contains the test suite. See the top of the script for how to run
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it.
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Credits: Written by Ulf "Ulfalizer" Magnusson
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Send bug reports, suggestions and other feedback to ulfalizer a.t Google's
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email service. Don't wrestle with internal APIs. Tell me what you need and I
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might add it in a safe way as a client API instead."""
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import os
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import platform
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import re
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import sys
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# File layout:
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#
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# Public classes
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# Public functions
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# Internal classes
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# Internal functions
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# Internal global constants
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# Line length: 79 columns
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#
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# Public classes
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#
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class Config(object):
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"""Represents a Kconfig configuration, e.g. for i386 or ARM. This is the
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set of symbols and other items appearing in the configuration together with
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their values. Creating any number of Config objects -- including for
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different architectures -- is safe; Kconfiglib has no global state."""
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#
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# Public interface
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#
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def __init__(self, filename="Kconfig", base_dir=None, print_warnings=True,
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print_undef_assign=False):
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"""Creates a new Config object, representing a Kconfig configuration.
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Raises Kconfig_Syntax_Error on syntax errors.
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filename (default: "Kconfig"): The base Kconfig file of the
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configuration. For the Linux kernel, you'll probably want "Kconfig"
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from the top-level directory, as environment variables will make
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sure the right Kconfig is included from there
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(arch/<architecture>/Kconfig). If you are using Kconfiglib via 'make
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scriptconfig', the filename of the base base Kconfig file will be in
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sys.argv[1].
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base_dir (default: None): The base directory relative to which 'source'
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statements within Kconfig files will work. For the Linux kernel this
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should be the top-level directory of the kernel tree. $-references
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to existing environment variables will be expanded.
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If None (the default), the environment variable 'srctree' will be
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used if set, and the current directory otherwise. 'srctree' is set
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by the Linux makefiles to the top-level kernel directory. A default
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of "." would not work with an alternative build directory.
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print_warnings (default: True): Set to True if warnings related to this
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configuration should be printed to stderr. This can be changed later
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with Config.set_print_warnings(). It is provided as a constructor
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argument since warnings might be generated during parsing.
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print_undef_assign (default: False): Set to True if informational
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messages related to assignments to undefined symbols should be
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printed to stderr for this configuration. Can be changed later with
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Config.set_print_undef_assign()."""
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# The set of all symbols, indexed by name (a string)
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self.syms = {}
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# Python 2/3 compatibility hack. This is the only one needed.
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self.syms_iter = self.syms.values if sys.version_info[0] >= 3 else \
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self.syms.itervalues
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# The set of all defined symbols in the configuration in the order they
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# appear in the Kconfig files. This excludes the special symbols n, m,
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# and y as well as symbols that are referenced but never defined.
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self.kconfig_syms = []
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# The set of all named choices (yes, choices can have names), indexed
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# by name (a string)
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self.named_choices = {}
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# Lists containing all choices, menus and comments in the configuration
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self.choices = []
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self.menus = []
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self.comments = []
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def register_special_symbol(type_, name, val):
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sym = Symbol()
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sym.is_special_ = True
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sym.is_defined_ = True
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sym.config = self
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sym.name = name
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sym.type = type_
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sym.cached_val = val
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self.syms[name] = sym
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return sym
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# The special symbols n, m and y, used as shorthand for "n", "m" and
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# "y"
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self.n = register_special_symbol(TRISTATE, "n", "n")
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self.m = register_special_symbol(TRISTATE, "m", "m")
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self.y = register_special_symbol(TRISTATE, "y", "y")
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# DEFCONFIG_LIST uses this
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register_special_symbol(STRING, "UNAME_RELEASE", platform.uname()[2])
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# The symbol with "option defconfig_list" set, containing a list of
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# default .config files
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self.defconfig_sym = None
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# See Symbol.get_(src)arch()
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self.arch = os.environ.get("ARCH")
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self.srcarch = os.environ.get("SRCARCH")
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# If you set CONFIG_ in the environment, Kconfig will prefix all symbols
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# with its value when saving the configuration, instead of using the default, "CONFIG_".
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self.config_prefix = os.environ.get("CONFIG_")
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if self.config_prefix is None:
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self.config_prefix = "CONFIG_"
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# See Config.__init__(). We need this for get_defconfig_filename().
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self.srctree = os.environ.get("srctree")
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if self.srctree is None:
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self.srctree = "."
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self.filename = filename
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self.base_dir = self.srctree if base_dir is None else \
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os.path.expandvars(base_dir)
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# The 'mainmenu' text
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self.mainmenu_text = None
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# The filename of the most recently loaded .config file
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self.config_filename = None
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# The textual header of the most recently loaded .config, uncommented
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self.config_header = None
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self.print_warnings = print_warnings
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self.print_undef_assign = print_undef_assign
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self._warnings = []
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# For parsing routines that stop when finding a line belonging to a
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# different construct, these holds that line and the tokenized version
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# of that line. The purpose is to avoid having to re-tokenize the line,
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# which is inefficient and causes problems when recording references to
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# symbols.
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self.end_line = None
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self.end_line_tokens = None
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# See the comment in _parse_expr().
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self._cur_item = None
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self._line = None
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self._filename = None
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self._linenr = None
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self._transform_m = None
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# Parse the Kconfig files
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self.top_block = []
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self._parse_file(filename, None, None, None, self.top_block)
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# Build Symbol.dep for all symbols
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self._build_dep()
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def get_arch(self):
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"""Returns the value the environment variable ARCH had at the time the
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Config instance was created, or None if ARCH was not set. For the
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kernel, this corresponds to the architecture being built for, with
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values such as "i386" or "mips"."""
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return self.arch
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def get_srcarch(self):
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"""Returns the value the environment variable SRCARCH had at the time
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the Config instance was created, or None if SRCARCH was not set. For
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the kernel, this corresponds to the particular arch/ subdirectory
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containing architecture-specific code."""
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return self.srcarch
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def get_srctree(self):
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"""Returns the value the environment variable srctree had at the time
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the Config instance was created, or None if srctree was not defined.
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This variable points to the source directory and is used when building
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in a separate directory."""
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return self.srctree
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def get_base_dir(self):
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"""Returns the base directory relative to which 'source' statements
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will work, passed as an argument to Config.__init__()."""
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return self.base_dir
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def get_kconfig_filename(self):
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"""Returns the name of the (base) kconfig file this configuration was
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loaded from."""
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return self.filename
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def get_config_filename(self):
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"""Returns the filename of the most recently loaded configuration file,
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or None if no configuration has been loaded."""
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return self.config_filename
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def get_config_header(self):
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"""Returns the (uncommented) textual header of the .config file most
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recently loaded with load_config(). Returns None if no .config file has
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been loaded or if the most recently loaded .config file has no header.
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The header consists of all lines up to but not including the first line
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that either
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1. Does not start with "#"
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2. Has the form "# CONFIG_FOO is not set."
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"""
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return self.config_header
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def get_mainmenu_text(self):
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"""Returns the text of the 'mainmenu' statement (with $-references to
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symbols replaced by symbol values), or None if the configuration has no
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'mainmenu' statement."""
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return None if self.mainmenu_text is None else \
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self._expand_sym_refs(self.mainmenu_text)
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def get_defconfig_filename(self):
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"""Returns the name of the defconfig file, which is the first existing
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file in the list given in a symbol having 'option defconfig_list' set.
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$-references to symbols will be expanded ("$FOO bar" -> "foo bar" if
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FOO has the value "foo"). Returns None in case of no defconfig file.
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Setting 'option defconfig_list' on multiple symbols currently results
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in undefined behavior.
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If the environment variable 'srctree' was set when the Config was
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created, get_defconfig_filename() will first look relative to that
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directory before looking in the current directory; see
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Config.__init__().
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WARNING: A wart here is that scripts/kconfig/Makefile sometimes uses
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the --defconfig=<defconfig> option when calling the C implementation of
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e.g. 'make defconfig'. This option overrides the 'option
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defconfig_list' symbol, meaning the result from
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get_defconfig_filename() might not match what 'make defconfig' would
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use. That probably ought to be worked around somehow, so that this
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function always gives the "expected" result."""
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if self.defconfig_sym is None:
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return None
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for filename, cond_expr in self.defconfig_sym.def_exprs:
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if self._eval_expr(cond_expr) == "y":
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filename = self._expand_sym_refs(filename)
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# We first look in $srctree. os.path.join() won't work here as
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# an absolute path in filename would override $srctree.
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srctree_filename = os.path.normpath(self.srctree + "/" +
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filename)
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if os.path.exists(srctree_filename):
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return srctree_filename
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if os.path.exists(filename):
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return filename
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return None
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def get_symbol(self, name):
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"""Returns the symbol with name 'name', or None if no such symbol
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appears in the configuration. An alternative shorthand is conf[name],
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where conf is a Config instance, though that will instead raise
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KeyError if the symbol does not exist."""
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return self.syms.get(name)
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def __getitem__(self, name):
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"""Returns the symbol with name 'name'. Raises KeyError if the symbol
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does not appear in the configuration."""
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return self.syms[name]
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def get_symbols(self, all_symbols=True):
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"""Returns a list of symbols from the configuration. An alternative for
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iterating over all defined symbols (in the order of definition) is
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for sym in config:
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...
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which relies on Config implementing __iter__() and is equivalent to
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for sym in config.get_symbols(False):
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...
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all_symbols (default: True): If True, all symbols -- including special
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and undefined symbols -- will be included in the result, in an
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undefined order. If False, only symbols actually defined and not
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merely referred to in the configuration will be included in the
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result, and will appear in the order that they are defined within
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the Kconfig configuration files."""
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return list(self.syms.values()) if all_symbols else self.kconfig_syms
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def __iter__(self):
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"""Convenience function for iterating over the set of all defined
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symbols in the configuration, used like
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for sym in conf:
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...
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The iteration happens in the order of definition within the Kconfig
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configuration files. Symbols only referred to but not defined will not
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be included, nor will the special symbols n, m, and y. If you want to
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include such symbols as well, see config.get_symbols()."""
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return iter(self.kconfig_syms)
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def get_choices(self):
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"""Returns a list containing all choice statements in the
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configuration, in the order they appear in the Kconfig files."""
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return self.choices
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def get_menus(self):
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"""Returns a list containing all menus in the configuration, in the
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order they appear in the Kconfig files."""
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return self.menus
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def get_comments(self):
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"""Returns a list containing all comments in the configuration, in the
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order they appear in the Kconfig files."""
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return self.comments
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def get_top_level_items(self):
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"""Returns a list containing the items (symbols, menus, choices, and
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comments) at the top level of the configuration -- that is, all items
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that do not appear within a menu or choice. The items appear in the
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same order as within the configuration."""
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return self.top_block
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def load_config(self, filename, replace=True):
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"""Loads symbol values from a file in the familiar .config format.
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Equivalent to calling Symbol.set_user_value() to set each of the
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values.
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"# CONFIG_FOO is not set" within a .config file is treated specially
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and sets the user value of FOO to 'n'. The C implementation works the
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same way.
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filename: The .config file to load. $-references to existing
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environment variables will be expanded. For scripts to work even when
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an alternative build directory is used with the Linux kernel, you
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need to refer to the top-level kernel directory with "$srctree".
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replace (default: True): True if the configuration should replace the
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old configuration; False if it should add to it.
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Returns a list or warnings (hopefully empty)
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"""
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self._warnings = []
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# Regular expressions for parsing .config files
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_set_re_match = re.compile(r"{}(\w+)=(.*)".format(self.config_prefix)).match
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_unset_re_match = re.compile(r"# {}(\w+) is not set".format(self.config_prefix)).match
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# Put this first so that a missing file doesn't screw up our state
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filename = os.path.expandvars(filename)
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line_feeder = _FileFeed(filename)
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self.config_filename = filename
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#
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# Read header
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#
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def is_header_line(line):
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return line is not None and line.startswith("#") and \
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not _unset_re_match(line)
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self.config_header = None
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line = line_feeder.peek_next()
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if is_header_line(line):
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self.config_header = ""
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while is_header_line(line_feeder.peek_next()):
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self.config_header += line_feeder.get_next()[1:]
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# Remove trailing newline
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if self.config_header.endswith("\n"):
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self.config_header = self.config_header[:-1]
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#
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# Read assignments. Hotspot for some workloads.
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#
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def warn_override(filename, linenr, name, old_user_val, new_user_val):
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self._warn('overriding the value of {0}. '
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'Old value: "{1}", new value: "{2}".'
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.format(name, old_user_val, new_user_val),
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filename, linenr)
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# Invalidate everything to keep things simple. It might be possible to
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# improve performance for the case where multiple configurations are
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# loaded by only invalidating a symbol (and its dependent symbols) if
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# the new user value differs from the old. One complication would be
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# that symbols not mentioned in the .config must lose their user value
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# when replace = True, which is the usual case.
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if replace:
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self.unset_user_values()
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else:
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self._invalidate_all()
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while 1:
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line = line_feeder.get_next()
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if line is None:
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return self._warnings
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line = line.rstrip()
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set_match = _set_re_match(line)
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if set_match:
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name, val = set_match.groups()
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if val.startswith('"'):
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if len(val) < 2 or val[-1] != '"':
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_parse_error(line, "malformed string literal",
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line_feeder.filename, line_feeder.linenr)
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# Strip quotes and remove escapings. The unescaping
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# procedure should be safe since " can only appear as \"
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# inside the string.
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val = val[1:-1].replace('\\"', '"').replace("\\\\", "\\")
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if name in self.syms:
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sym = self.syms[name]
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if sym.user_val is not None:
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warn_override(line_feeder.filename, line_feeder.linenr,
|
|
name, sym.user_val, val)
|
|
|
|
if sym.is_choice_sym:
|
|
user_mode = sym.parent.user_mode
|
|
if user_mode is not None and user_mode != val:
|
|
self._warn("assignment to {0} changes mode of "
|
|
'containing choice from "{1}" to "{2}".'
|
|
.format(name, val, user_mode),
|
|
line_feeder.filename,
|
|
line_feeder.linenr)
|
|
|
|
sym._set_user_value_no_invalidate(val, True)
|
|
else:
|
|
if self.print_undef_assign:
|
|
_stderr_msg('note: attempt to assign the value "{0}" '
|
|
"to the undefined symbol {1}."
|
|
.format(val, name),
|
|
line_feeder.filename, line_feeder.linenr)
|
|
else:
|
|
unset_match = _unset_re_match(line)
|
|
if unset_match:
|
|
name = unset_match.group(1)
|
|
if name in self.syms:
|
|
sym = self.syms[name]
|
|
if sym.user_val is not None:
|
|
warn_override(line_feeder.filename,
|
|
line_feeder.linenr,
|
|
name, sym.user_val, "n")
|
|
|
|
sym._set_user_value_no_invalidate("n", True)
|
|
|
|
def write_config(self, filename, header=None):
|
|
"""Writes out symbol values in the familiar .config format.
|
|
|
|
Kconfiglib makes sure the format matches what the C implementation
|
|
would generate, down to whitespace. This eases testing.
|
|
|
|
filename: The filename under which to save the configuration.
|
|
|
|
header (default: None): A textual header that will appear at the
|
|
beginning of the file, with each line commented out automatically.
|
|
None means no header."""
|
|
|
|
for sym in self.syms_iter():
|
|
sym.already_written = False
|
|
|
|
with open(filename, "w") as f:
|
|
# Write header
|
|
if header is not None:
|
|
f.write(_comment(header) + "\n")
|
|
|
|
# Build and write configuration
|
|
conf_strings = []
|
|
_make_block_conf(self.top_block, conf_strings.append)
|
|
f.write("\n".join(conf_strings) + "\n")
|
|
|
|
def eval(self, s):
|
|
"""Returns the value of the expression 's' -- where 's' is represented
|
|
as a string -- in the context of the configuration. Raises
|
|
Kconfig_Syntax_Error if syntax errors are detected in 's'.
|
|
|
|
For example, if FOO and BAR are tristate symbols at least one of which
|
|
has the value "y", then config.eval("y && (FOO || BAR)") => "y"
|
|
|
|
This function always yields a tristate value. To get the value of
|
|
non-bool, non-tristate symbols, use Symbol.get_value().
|
|
|
|
The result of this function is consistent with how evaluation works for
|
|
conditional expressions in the configuration as well as in the C
|
|
implementation. "m" and m are rewritten as '"m" && MODULES' and 'm &&
|
|
MODULES', respectively, and a result of "m" will get promoted to "y" if
|
|
we're running without modules.
|
|
|
|
Syntax checking is somewhat lax, partly to be compatible with lax
|
|
parsing in the C implementation."""
|
|
return self._eval_expr(self._parse_expr(self._tokenize(s, True), # Feed
|
|
None, # Current symbol/choice
|
|
s)) # line
|
|
|
|
def unset_user_values(self):
|
|
"""Resets the values of all symbols, as if Config.load_config() or
|
|
Symbol.set_user_value() had never been called."""
|
|
for sym in self.syms_iter():
|
|
sym._unset_user_value_no_recursive_invalidate()
|
|
|
|
def set_print_warnings(self, print_warnings):
|
|
"""Determines whether warnings related to this configuration (for
|
|
things like attempting to assign illegal values to symbols with
|
|
Symbol.set_user_value()) should be printed to stderr.
|
|
|
|
print_warnings: True if warnings should be printed."""
|
|
self.print_warnings = print_warnings
|
|
|
|
def set_print_undef_assign(self, print_undef_assign):
|
|
"""Determines whether informational messages related to assignments to
|
|
undefined symbols should be printed to stderr for this configuration.
|
|
|
|
print_undef_assign: If True, such messages will be printed."""
|
|
self.print_undef_assign = print_undef_assign
|
|
|
|
def __str__(self):
|
|
"""Returns a string containing various information about the Config."""
|
|
return _lines("Configuration",
|
|
"File : " +
|
|
self.filename,
|
|
"Base directory : " +
|
|
self.base_dir,
|
|
"Value of $ARCH at creation time : " +
|
|
("(not set)" if self.arch is None else self.arch),
|
|
"Value of $SRCARCH at creation time : " +
|
|
("(not set)" if self.srcarch is None else
|
|
self.srcarch),
|
|
"Source tree (derived from $srctree;",
|
|
"defaults to '.' if $srctree isn't set) : " +
|
|
self.srctree,
|
|
"Most recently loaded .config : " +
|
|
("(no .config loaded)"
|
|
if self.config_filename is None else
|
|
self.config_filename),
|
|
"Print warnings : " +
|
|
BOOL_STR[self.print_warnings],
|
|
"Print assignments to undefined symbols : " +
|
|
BOOL_STR[self.print_undef_assign])
|
|
|
|
#
|
|
# Private methods
|
|
#
|
|
|
|
#
|
|
# Kconfig parsing
|
|
#
|
|
|
|
def _parse_file(self, filename, parent, deps, visible_if_deps, block):
|
|
"""Parses the Kconfig file 'filename'. Appends the Items in the file
|
|
(and any file it sources) to the list passed in the 'block' parameter.
|
|
See _parse_block() for the meaning of the parameters."""
|
|
self._parse_block(_FileFeed(filename), None, parent, deps,
|
|
visible_if_deps, block)
|
|
|
|
def _parse_block(self, line_feeder, end_marker, parent, deps,
|
|
visible_if_deps, block):
|
|
"""Parses a block, which is the contents of either a file or an if,
|
|
menu, or choice statement. Appends the Items to the list passed in the
|
|
'block' parameter.
|
|
|
|
line_feeder: A _FileFeed instance feeding lines from a file. The
|
|
Kconfig language is line-based in practice.
|
|
|
|
end_marker: The token that ends the block, e.g. T_ENDIF ("endif") for
|
|
ifs. None for files.
|
|
|
|
parent: The enclosing menu or choice, or None if we're at the top
|
|
level.
|
|
|
|
deps: Dependencies from enclosing menus, choices and ifs.
|
|
|
|
visible_if_deps (default: None): 'visible if' dependencies from
|
|
enclosing menus.
|
|
|
|
block: The list to add items to."""
|
|
|
|
while 1:
|
|
# Do we already have a tokenized line that we determined wasn't
|
|
# part of whatever we were parsing earlier? See comment in
|
|
# Config.__init__().
|
|
if self.end_line is not None:
|
|
line = self.end_line
|
|
tokens = self.end_line_tokens
|
|
tokens.unget_all()
|
|
|
|
self.end_line = None
|
|
self.end_line_tokens = None
|
|
else:
|
|
line = line_feeder.get_next()
|
|
if line is None:
|
|
if end_marker is not None:
|
|
raise Kconfig_Syntax_Error("Unexpected end of file {0}"
|
|
.format(line_feeder.filename))
|
|
return
|
|
|
|
tokens = self._tokenize(line, False, line_feeder.filename,
|
|
line_feeder.linenr)
|
|
|
|
t0 = tokens.get_next()
|
|
if t0 is None:
|
|
continue
|
|
|
|
# Cases are ordered roughly by frequency, which speeds things up a
|
|
# bit
|
|
|
|
if t0 == T_CONFIG or t0 == T_MENUCONFIG:
|
|
# The tokenizer will automatically allocate a new Symbol object
|
|
# for any new names it encounters, so we don't need to worry
|
|
# about that here.
|
|
sym = tokens.get_next()
|
|
|
|
# Symbols defined in multiple places get the parent of their
|
|
# first definition. However, for symbols whose parents are
|
|
# choice statements, the choice statement takes precedence.
|
|
if not sym.is_defined_ or isinstance(parent, Choice):
|
|
sym.parent = parent
|
|
sym.is_defined_ = True
|
|
|
|
self._parse_properties(line_feeder, sym, deps, visible_if_deps)
|
|
|
|
self.kconfig_syms.append(sym)
|
|
block.append(sym)
|
|
|
|
elif t0 == T_SOURCE:
|
|
kconfig_file = tokens.get_next()
|
|
exp_kconfig_file = self._expand_sym_refs(kconfig_file)
|
|
f = os.path.join(self.base_dir, exp_kconfig_file)
|
|
if not os.path.exists(f):
|
|
raise IOError('{0}:{1}: sourced file "{2}" (expands to '
|
|
'"{3}") not found. Perhaps base_dir '
|
|
'(argument to Config.__init__(), currently '
|
|
'"{4}") is set to the wrong value.'
|
|
.format(line_feeder.filename,
|
|
line_feeder.linenr,
|
|
kconfig_file, exp_kconfig_file,
|
|
self.base_dir))
|
|
# Add items to the same block
|
|
self._parse_file(f, parent, deps, visible_if_deps, block)
|
|
|
|
elif t0 == end_marker:
|
|
# We have reached the end of the block
|
|
return
|
|
|
|
elif t0 == T_IF:
|
|
# If statements are treated as syntactic sugar for adding
|
|
# dependencies to enclosed items and do not have an explicit
|
|
# object representation.
|
|
|
|
dep_expr = self._parse_expr(tokens, None, line,
|
|
line_feeder.filename,
|
|
line_feeder.linenr)
|
|
# Add items to the same block
|
|
self._parse_block(line_feeder, T_ENDIF, parent,
|
|
_make_and(dep_expr, deps),
|
|
visible_if_deps, block)
|
|
|
|
elif t0 == T_COMMENT:
|
|
comment = Comment()
|
|
comment.config = self
|
|
comment.parent = parent
|
|
comment.filename = line_feeder.filename
|
|
comment.linenr = line_feeder.linenr
|
|
comment.text = tokens.get_next()
|
|
|
|
self._parse_properties(line_feeder, comment, deps,
|
|
visible_if_deps)
|
|
|
|
self.comments.append(comment)
|
|
block.append(comment)
|
|
|
|
elif t0 == T_MENU:
|
|
menu = Menu()
|
|
menu.config = self
|
|
menu.parent = parent
|
|
menu.filename = line_feeder.filename
|
|
menu.linenr = line_feeder.linenr
|
|
menu.title = tokens.get_next()
|
|
|
|
self._parse_properties(line_feeder, menu, deps,
|
|
visible_if_deps)
|
|
|
|
# This needs to go before _parse_block() so that we get the
|
|
# proper menu ordering in the case of nested functions
|
|
self.menus.append(menu)
|
|
# Parse contents and put Items in menu.block
|
|
self._parse_block(line_feeder, T_ENDMENU, menu, menu.dep_expr,
|
|
_make_and(visible_if_deps,
|
|
menu.visible_if_expr),
|
|
menu.block)
|
|
|
|
block.append(menu)
|
|
|
|
elif t0 == T_CHOICE:
|
|
name = tokens.get_next()
|
|
if name is None:
|
|
choice = Choice()
|
|
self.choices.append(choice)
|
|
else:
|
|
# Named choice
|
|
choice = self.named_choices.get(name)
|
|
if choice is None:
|
|
choice = Choice()
|
|
choice.name = name
|
|
self.named_choices[name] = choice
|
|
self.choices.append(choice)
|
|
|
|
choice.config = self
|
|
choice.parent = parent
|
|
|
|
choice.def_locations.append((line_feeder.filename,
|
|
line_feeder.linenr))
|
|
|
|
self._parse_properties(line_feeder, choice, deps,
|
|
visible_if_deps)
|
|
|
|
# Parse contents and put Items in choice.block
|
|
self._parse_block(line_feeder, T_ENDCHOICE, choice, deps,
|
|
visible_if_deps, choice.block)
|
|
|
|
choice._determine_actual_symbols()
|
|
|
|
# If no type is specified for the choice, its type is that of
|
|
# the first choice item with a specified type
|
|
if choice.type == UNKNOWN:
|
|
for item in choice.actual_symbols:
|
|
if item.type != UNKNOWN:
|
|
choice.type = item.type
|
|
break
|
|
|
|
# Each choice item of UNKNOWN type gets the type of the choice
|
|
for item in choice.actual_symbols:
|
|
if item.type == UNKNOWN:
|
|
item.type = choice.type
|
|
|
|
block.append(choice)
|
|
|
|
elif t0 == T_MAINMENU:
|
|
text = tokens.get_next()
|
|
if self.mainmenu_text is not None:
|
|
self._warn("overriding 'mainmenu' text. "
|
|
'Old value: "{0}", new value: "{1}".'
|
|
.format(self.mainmenu_text, text),
|
|
line_feeder.filename, line_feeder.linenr)
|
|
self.mainmenu_text = text
|
|
|
|
else:
|
|
_parse_error(line, "unrecognized construct",
|
|
line_feeder.filename, line_feeder.linenr)
|
|
|
|
def _parse_properties(self, line_feeder, stmt, deps, visible_if_deps):
|
|
"""Parsing of properties for symbols, menus, choices, and comments.
|
|
Takes care of propagating dependencies from enclosing menus and ifs."""
|
|
|
|
def parse_val_and_cond(tokens, line, filename, linenr):
|
|
"""Parses '<expr1> if <expr2>' constructs, where the 'if' part is
|
|
optional. Returns a tuple containing the parsed expressions, with
|
|
None as the second element if the 'if' part is missing."""
|
|
return (self._parse_expr(tokens, stmt, line, filename, linenr,
|
|
False),
|
|
self._parse_expr(tokens, stmt, line, filename, linenr)
|
|
if tokens.check(T_IF) else None)
|
|
|
|
# In case the symbol is defined in multiple locations, we need to
|
|
# remember what prompts, defaults, selects, and implies are new for
|
|
# this definition, as "depends on" should only apply to the local
|
|
# definition.
|
|
new_prompt = None
|
|
new_def_exprs = []
|
|
new_selects = []
|
|
new_implies = []
|
|
|
|
# Dependencies from 'depends on' statements
|
|
depends_on_expr = None
|
|
|
|
while 1:
|
|
line = line_feeder.get_next()
|
|
if line is None:
|
|
break
|
|
|
|
filename = line_feeder.filename
|
|
linenr = line_feeder.linenr
|
|
|
|
tokens = self._tokenize(line, False, filename, linenr)
|
|
|
|
t0 = tokens.get_next()
|
|
if t0 is None:
|
|
continue
|
|
|
|
# Cases are ordered roughly by frequency, which speeds things up a
|
|
# bit
|
|
|
|
if t0 == T_DEPENDS:
|
|
if not tokens.check(T_ON):
|
|
_parse_error(line, 'expected "on" after "depends"',
|
|
filename, linenr)
|
|
|
|
parsed_deps = self._parse_expr(tokens, stmt, line, filename,
|
|
linenr)
|
|
|
|
if isinstance(stmt, (Menu, Comment)):
|
|
stmt.orig_deps = _make_and(stmt.orig_deps, parsed_deps)
|
|
else:
|
|
depends_on_expr = _make_and(depends_on_expr, parsed_deps)
|
|
|
|
elif t0 == T_HELP:
|
|
# Find first non-blank (not all-space) line and get its
|
|
# indentation
|
|
line = line_feeder.next_nonblank()
|
|
if line is None:
|
|
stmt.help = ""
|
|
break
|
|
indent = _indentation(line)
|
|
if indent == 0:
|
|
# If the first non-empty lines has zero indent, there is no
|
|
# help text
|
|
stmt.help = ""
|
|
line_feeder.unget()
|
|
break
|
|
|
|
# The help text goes on till the first non-empty line with less
|
|
# indent
|
|
help_lines = [_deindent(line, indent)]
|
|
while 1:
|
|
line = line_feeder.get_next()
|
|
if line is None or \
|
|
(not line.isspace() and _indentation(line) < indent):
|
|
stmt.help = "".join(help_lines)
|
|
break
|
|
help_lines.append(_deindent(line, indent))
|
|
|
|
if line is None:
|
|
break
|
|
|
|
line_feeder.unget()
|
|
|
|
elif t0 == T_SELECT:
|
|
target = tokens.get_next()
|
|
|
|
stmt.referenced_syms.add(target)
|
|
stmt.selected_syms.add(target)
|
|
|
|
new_selects.append(
|
|
(target,
|
|
self._parse_expr(tokens, stmt, line, filename, linenr)
|
|
if tokens.check(T_IF) else None))
|
|
|
|
elif t0 == T_IMPLY:
|
|
target = tokens.get_next()
|
|
|
|
stmt.referenced_syms.add(target)
|
|
stmt.implied_syms.add(target)
|
|
|
|
new_implies.append(
|
|
(target,
|
|
self._parse_expr(tokens, stmt, line, filename, linenr)
|
|
if tokens.check(T_IF) else None))
|
|
|
|
elif t0 in (T_BOOL, T_TRISTATE, T_INT, T_HEX, T_STRING):
|
|
stmt.type = TOKEN_TO_TYPE[t0]
|
|
if tokens.peek_next() is not None:
|
|
new_prompt = parse_val_and_cond(tokens, line, filename,
|
|
linenr)
|
|
|
|
elif t0 == T_DEFAULT:
|
|
new_def_exprs.append(parse_val_and_cond(tokens, line, filename,
|
|
linenr))
|
|
|
|
elif t0 == T_DEF_BOOL:
|
|
stmt.type = BOOL
|
|
if tokens.peek_next() is not None:
|
|
new_def_exprs.append(parse_val_and_cond(tokens, line,
|
|
filename, linenr))
|
|
|
|
elif t0 == T_PROMPT:
|
|
# 'prompt' properties override each other within a single
|
|
# definition of a symbol, but additional prompts can be added
|
|
# by defining the symbol multiple times; hence 'new_prompt'
|
|
# instead of 'prompt'.
|
|
new_prompt = parse_val_and_cond(tokens, line, filename, linenr)
|
|
|
|
elif t0 == T_RANGE:
|
|
low = tokens.get_next()
|
|
high = tokens.get_next()
|
|
stmt.referenced_syms.add(low)
|
|
stmt.referenced_syms.add(high)
|
|
|
|
stmt.ranges.append(
|
|
(low, high,
|
|
self._parse_expr(tokens, stmt, line, filename, linenr)
|
|
if tokens.check(T_IF) else None))
|
|
|
|
elif t0 == T_DEF_TRISTATE:
|
|
stmt.type = TRISTATE
|
|
if tokens.peek_next() is not None:
|
|
new_def_exprs.append(parse_val_and_cond(tokens, line,
|
|
filename, linenr))
|
|
|
|
elif t0 == T_OPTION:
|
|
if tokens.check(T_ENV) and tokens.check(T_EQUAL):
|
|
env_var = tokens.get_next()
|
|
|
|
stmt.is_special_ = True
|
|
stmt.is_from_env = True
|
|
|
|
if env_var not in os.environ:
|
|
self._warn("The symbol {0} references the "
|
|
"non-existent environment variable {1} and "
|
|
"will get the empty string as its value. "
|
|
"If you're using Kconfiglib via "
|
|
"'make (i)scriptconfig', it should have "
|
|
"set up the environment correctly for you. "
|
|
"If you still got this message, that "
|
|
"might be an error, and you should email "
|
|
"ulfalizer a.t Google's email service."""
|
|
.format(stmt.name, env_var),
|
|
filename, linenr)
|
|
|
|
stmt.cached_val = ""
|
|
else:
|
|
stmt.cached_val = os.environ[env_var]
|
|
|
|
elif tokens.check(T_DEFCONFIG_LIST):
|
|
self.defconfig_sym = stmt
|
|
|
|
elif tokens.check(T_MODULES):
|
|
# To reduce warning spam, only warn if 'option modules' is
|
|
# set on some symbol that isn't MODULES, which should be
|
|
# safe. I haven't run into any projects that make use
|
|
# modules besides the kernel yet, and there it's likely to
|
|
# keep being called "MODULES".
|
|
if stmt.name != "MODULES":
|
|
self._warn("the 'modules' option is not supported. "
|
|
"Let me know if this is a problem for you; "
|
|
"it shouldn't be that hard to implement. "
|
|
"(Note that modules are still supported -- "
|
|
"Kconfiglib just assumes the symbol name "
|
|
"MODULES, like older versions of the C "
|
|
"implementation did when 'option modules' "
|
|
"wasn't used.)",
|
|
filename, linenr)
|
|
|
|
elif tokens.check(T_ALLNOCONFIG_Y):
|
|
if not isinstance(stmt, Symbol):
|
|
_parse_error(line,
|
|
"the 'allnoconfig_y' option is only "
|
|
"valid for symbols",
|
|
filename, linenr)
|
|
stmt.allnoconfig_y = True
|
|
|
|
else:
|
|
_parse_error(line, "unrecognized option", filename, linenr)
|
|
|
|
elif t0 == T_VISIBLE:
|
|
if not tokens.check(T_IF):
|
|
_parse_error(line, 'expected "if" after "visible"',
|
|
filename, linenr)
|
|
if not isinstance(stmt, Menu):
|
|
_parse_error(line,
|
|
"'visible if' is only valid for menus",
|
|
filename, linenr)
|
|
|
|
parsed_deps = self._parse_expr(tokens, stmt, line, filename,
|
|
linenr)
|
|
stmt.visible_if_expr = _make_and(stmt.visible_if_expr,
|
|
parsed_deps)
|
|
|
|
elif t0 == T_OPTIONAL:
|
|
if not isinstance(stmt, Choice):
|
|
_parse_error(line,
|
|
'"optional" is only valid for choices',
|
|
filename,
|
|
linenr)
|
|
stmt.optional = True
|
|
|
|
else:
|
|
# See comment in Config.__init__()
|
|
self.end_line = line
|
|
self.end_line_tokens = tokens
|
|
break
|
|
|
|
# Done parsing properties. Now propagate 'depends on' and enclosing
|
|
# menu/if dependencies to expressions.
|
|
|
|
# The set of symbols referenced directly by the statement plus all
|
|
# symbols referenced by enclosing menus and ifs
|
|
stmt.all_referenced_syms = stmt.referenced_syms | _get_expr_syms(deps)
|
|
|
|
# Save original dependencies from enclosing menus and ifs
|
|
stmt.deps_from_containing = deps
|
|
|
|
if isinstance(stmt, (Menu, Comment)):
|
|
stmt.dep_expr = _make_and(stmt.orig_deps, deps)
|
|
else:
|
|
# Symbol or Choice
|
|
|
|
# See comment for 'menu_dep'
|
|
stmt.menu_dep = _make_and(deps, depends_on_expr)
|
|
|
|
# Propagate dependencies to prompts
|
|
|
|
if new_prompt is not None:
|
|
prompt, cond_expr = new_prompt
|
|
# Propagate 'visible if' dependencies from menus and local
|
|
# 'depends on' dependencies
|
|
cond_expr = _make_and(_make_and(cond_expr, visible_if_deps),
|
|
depends_on_expr)
|
|
# Save original
|
|
stmt.orig_prompts.append((prompt, cond_expr))
|
|
# Finalize with dependencies from enclosing menus and ifs
|
|
stmt.prompts.append((prompt, _make_and(cond_expr, deps)))
|
|
|
|
# Propagate dependencies to defaults
|
|
|
|
# Propagate 'depends on' dependencies
|
|
new_def_exprs = [(val_expr, _make_and(cond_expr, depends_on_expr))
|
|
for val_expr, cond_expr in new_def_exprs]
|
|
# Save original
|
|
stmt.orig_def_exprs.extend(new_def_exprs)
|
|
# Finalize with dependencies from enclosing menus and ifs
|
|
stmt.def_exprs.extend([(val_expr, _make_and(cond_expr, deps))
|
|
for val_expr, cond_expr in new_def_exprs])
|
|
|
|
# Propagate dependencies to selects and implies
|
|
|
|
# Only symbols can select and imply
|
|
if isinstance(stmt, Symbol):
|
|
# Propagate 'depends on' dependencies
|
|
new_selects = [(target, _make_and(cond_expr, depends_on_expr))
|
|
for target, cond_expr in new_selects]
|
|
new_implies = [(target, _make_and(cond_expr, depends_on_expr))
|
|
for target, cond_expr in new_implies]
|
|
# Save original
|
|
stmt.orig_selects.extend(new_selects)
|
|
stmt.orig_implies.extend(new_implies)
|
|
# Finalize with dependencies from enclosing menus and ifs
|
|
for target, cond in new_selects:
|
|
target.rev_dep = \
|
|
_make_or(target.rev_dep,
|
|
_make_and(stmt, _make_and(cond, deps)))
|
|
for target, cond in new_implies:
|
|
target.weak_rev_dep = \
|
|
_make_or(target.weak_rev_dep,
|
|
_make_and(stmt, _make_and(cond, deps)))
|
|
|
|
def _parse_expr(self, feed, cur_item, line, filename=None, linenr=None,
|
|
transform_m=True):
|
|
"""Parses an expression from the tokens in 'feed' using a simple
|
|
top-down approach. The result has the form
|
|
'(<operator>, [<parsed operands>])', where <operator> is e.g.
|
|
kconfiglib.AND. If there is only one operand (i.e., no && or ||), then
|
|
the operand is returned directly. This also goes for subexpressions.
|
|
|
|
feed: _Feed instance containing the tokens for the expression.
|
|
|
|
cur_item: The item (Symbol, Choice, Menu, or Comment) currently being
|
|
parsed, or None if we're not parsing an item. Used for recording
|
|
references to symbols.
|
|
|
|
line: The line containing the expression being parsed.
|
|
|
|
filename (default: None): The file containing the expression.
|
|
|
|
linenr (default: None): The line number containing the expression.
|
|
|
|
transform_m (default: False): Determines if 'm' should be rewritten to
|
|
'm && MODULES' -- see parse_val_and_cond().
|
|
|
|
Expression grammar, in decreasing order of precedence:
|
|
|
|
<expr> -> <symbol>
|
|
<symbol> '=' <symbol>
|
|
<symbol> '!=' <symbol>
|
|
'(' <expr> ')'
|
|
'!' <expr>
|
|
<expr> '&&' <expr>
|
|
<expr> '||' <expr>"""
|
|
|
|
# Use instance variables to avoid having to pass these as arguments
|
|
# through the top-down parser in _parse_expr_rec(), which is tedious
|
|
# and obfuscates the code. A profiler run shows no noticeable
|
|
# performance difference.
|
|
self._cur_item = cur_item
|
|
self._transform_m = transform_m
|
|
self._line = line
|
|
self._filename = filename
|
|
self._linenr = linenr
|
|
|
|
return self._parse_expr_rec(feed)
|
|
|
|
def _parse_expr_rec(self, feed):
|
|
or_term = self._parse_or_term(feed)
|
|
if not feed.check(T_OR):
|
|
# Common case -- no need for an OR node since it's just a single
|
|
# operand
|
|
return or_term
|
|
or_terms = [or_term, self._parse_or_term(feed)]
|
|
while feed.check(T_OR):
|
|
or_terms.append(self._parse_or_term(feed))
|
|
return (OR, or_terms)
|
|
|
|
def _parse_or_term(self, feed):
|
|
and_term = self._parse_factor(feed)
|
|
if not feed.check(T_AND):
|
|
# Common case -- no need for an AND node since it's just a single
|
|
# operand
|
|
return and_term
|
|
and_terms = [and_term, self._parse_factor(feed)]
|
|
while feed.check(T_AND):
|
|
and_terms.append(self._parse_factor(feed))
|
|
return (AND, and_terms)
|
|
|
|
def _parse_factor(self, feed):
|
|
token = feed.get_next()
|
|
|
|
if isinstance(token, (Symbol, str)):
|
|
if self._cur_item is not None and isinstance(token, Symbol):
|
|
self._cur_item.referenced_syms.add(token)
|
|
|
|
next_token = feed.peek_next()
|
|
# For conditional expressions ('depends on <expr>',
|
|
# '... if <expr>', # etc.), "m" and m are rewritten to
|
|
# "m" && MODULES.
|
|
if next_token != T_EQUAL and next_token != T_UNEQUAL:
|
|
if self._transform_m and (token is self.m or token == "m"):
|
|
return (AND, ["m", self._sym_lookup("MODULES")])
|
|
return token
|
|
|
|
relation = EQUAL if (feed.get_next() == T_EQUAL) else UNEQUAL
|
|
token_2 = feed.get_next()
|
|
if self._cur_item is not None and isinstance(token_2, Symbol):
|
|
self._cur_item.referenced_syms.add(token_2)
|
|
return (relation, token, token_2)
|
|
|
|
if token == T_NOT:
|
|
return (NOT, self._parse_factor(feed))
|
|
|
|
if token == T_OPEN_PAREN:
|
|
expr_parse = self._parse_expr_rec(feed)
|
|
if not feed.check(T_CLOSE_PAREN):
|
|
_parse_error(self._line, "missing end parenthesis",
|
|
self._filename, self._linenr)
|
|
return expr_parse
|
|
|
|
_parse_error(self._line, "malformed expression", self._filename,
|
|
self._linenr)
|
|
|
|
def _tokenize(self, s, for_eval, filename=None, linenr=None):
|
|
"""Returns a _Feed instance containing tokens derived from the string
|
|
's'. Registers any new symbols encountered (via _sym_lookup()).
|
|
|
|
(I experimented with a pure regular expression implementation, but it
|
|
came out slower, less readable, and wouldn't have been as flexible.)
|
|
|
|
for_eval: True when parsing an expression for a call to Config.eval(),
|
|
in which case we should not treat the first token specially nor
|
|
register new symbols."""
|
|
|
|
s = s.strip()
|
|
if s == "" or s[0] == "#":
|
|
return _Feed([])
|
|
|
|
if for_eval:
|
|
previous = None # The previous token seen
|
|
tokens = []
|
|
i = 0 # The current index in the string being tokenized
|
|
|
|
else:
|
|
# The initial word on a line is parsed specially. Let
|
|
# command_chars = [A-Za-z0-9_]. Then
|
|
# - leading non-command_chars characters are ignored, and
|
|
# - the first token consists the following one or more
|
|
# command_chars characters.
|
|
# This is why things like "----help--" are accepted.
|
|
initial_token_match = _initial_token_re_match(s)
|
|
if initial_token_match is None:
|
|
return _Feed([])
|
|
keyword = _get_keyword(initial_token_match.group(1))
|
|
if keyword == T_HELP:
|
|
# Avoid junk after "help", e.g. "---", being registered as a
|
|
# symbol
|
|
return _Feed([T_HELP])
|
|
if keyword is None:
|
|
# We expect a keyword as the first token
|
|
_tokenization_error(s, filename, linenr)
|
|
|
|
previous = keyword
|
|
tokens = [keyword]
|
|
# The current index in the string being tokenized
|
|
i = initial_token_match.end()
|
|
|
|
# _tokenize() is a hotspot during parsing, and this speeds things up a
|
|
# bit
|
|
strlen = len(s)
|
|
append = tokens.append
|
|
|
|
# Main tokenization loop. (Handles tokens past the first one.)
|
|
while i < strlen:
|
|
# Test for an identifier/keyword preceded by whitespace first; this
|
|
# is the most common case.
|
|
id_keyword_match = _id_keyword_re_match(s, i)
|
|
if id_keyword_match:
|
|
# We have an identifier or keyword. The above also stripped any
|
|
# whitespace for us.
|
|
name = id_keyword_match.group(1)
|
|
# Jump past it
|
|
i = id_keyword_match.end()
|
|
|
|
keyword = _get_keyword(name)
|
|
if keyword is not None:
|
|
# It's a keyword
|
|
append(keyword)
|
|
elif previous in STRING_LEX:
|
|
# What would ordinarily be considered an identifier is
|
|
# treated as a string after certain tokens
|
|
append(name)
|
|
else:
|
|
# It's a symbol name. _sym_lookup() will take care of
|
|
# allocating a new Symbol instance if it's the first time
|
|
# we see it.
|
|
sym = self._sym_lookup(name, for_eval)
|
|
|
|
if previous == T_CONFIG or previous == T_MENUCONFIG:
|
|
# If the previous token is T_(MENU)CONFIG
|
|
# ("(menu)config"), we're tokenizing the first line of
|
|
# a symbol definition, and should remember this as a
|
|
# location where the symbol is defined
|
|
sym.def_locations.append((filename, linenr))
|
|
else:
|
|
# Otherwise, it's a reference to the symbol
|
|
sym.ref_locations.append((filename, linenr))
|
|
|
|
append(sym)
|
|
|
|
else:
|
|
# Not an identifier/keyword
|
|
|
|
while i < strlen and s[i].isspace():
|
|
i += 1
|
|
if i == strlen:
|
|
break
|
|
c = s[i]
|
|
i += 1
|
|
|
|
# String literal (constant symbol)
|
|
if c == '"' or c == "'":
|
|
if "\\" in s:
|
|
# Slow path: This could probably be sped up, but it's a
|
|
# very unusual case anyway.
|
|
quote = c
|
|
val = ""
|
|
while 1:
|
|
if i >= len(s):
|
|
_tokenization_error(s, filename, linenr)
|
|
c = s[i]
|
|
if c == quote:
|
|
break
|
|
if c == "\\":
|
|
if i + 1 >= len(s):
|
|
_tokenization_error(s, filename, linenr)
|
|
val += s[i + 1]
|
|
i += 2
|
|
else:
|
|
val += c
|
|
i += 1
|
|
i += 1
|
|
append(val)
|
|
else:
|
|
# Fast path: If the string contains no backslashes
|
|
# (almost always) we can simply look for the matching
|
|
# quote.
|
|
end = s.find(c, i)
|
|
if end == -1:
|
|
_tokenization_error(s, filename, linenr)
|
|
append(s[i:end])
|
|
i = end + 1
|
|
|
|
elif c == "&":
|
|
# Invalid characters are ignored
|
|
if i >= len(s) or s[i] != "&": continue
|
|
append(T_AND)
|
|
i += 1
|
|
|
|
elif c == "|":
|
|
# Invalid characters are ignored
|
|
if i >= len(s) or s[i] != "|": continue
|
|
append(T_OR)
|
|
i += 1
|
|
|
|
elif c == "!":
|
|
if i < len(s) and s[i] == "=":
|
|
append(T_UNEQUAL)
|
|
i += 1
|
|
else:
|
|
append(T_NOT)
|
|
|
|
elif c == "=": append(T_EQUAL)
|
|
elif c == "(": append(T_OPEN_PAREN)
|
|
elif c == ")": append(T_CLOSE_PAREN)
|
|
elif c == "#": break # Comment
|
|
|
|
else: continue # Invalid characters are ignored
|
|
|
|
previous = tokens[-1]
|
|
|
|
return _Feed(tokens)
|
|
|
|
def _sym_lookup(self, name, for_eval=False):
|
|
"""Fetches the symbol 'name' from the symbol table, creating and
|
|
registering it if it does not exist. If 'for_eval' is True, the symbol
|
|
won't be added to the symbol table if it does not exist -- this is for
|
|
Config.eval()."""
|
|
if name in self.syms:
|
|
return self.syms[name]
|
|
|
|
new_sym = Symbol()
|
|
new_sym.config = self
|
|
new_sym.name = name
|
|
if for_eval:
|
|
self._warn("no symbol {0} in configuration".format(name))
|
|
else:
|
|
self.syms[name] = new_sym
|
|
return new_sym
|
|
|
|
#
|
|
# Expression evaluation
|
|
#
|
|
|
|
def _eval_expr(self, expr):
|
|
"""Evaluates an expression to "n", "m", or "y"."""
|
|
|
|
# Handles e.g. an "x if y" condition where the "if y" part is missing.
|
|
if expr is None:
|
|
return "y"
|
|
|
|
res = self._eval_expr_rec(expr)
|
|
if res == "m":
|
|
# Promote "m" to "y" if we're running without modules.
|
|
#
|
|
# Internally, "m" is often rewritten to "m" && MODULES by both the
|
|
# C implementation and Kconfiglib, which takes care of cases where
|
|
# "m" should be demoted to "n" instead.
|
|
modules_sym = self.syms.get("MODULES")
|
|
if modules_sym is None or modules_sym.get_value() != "y":
|
|
return "y"
|
|
return res
|
|
|
|
def _eval_expr_rec(self, expr):
|
|
if isinstance(expr, Symbol):
|
|
# Non-bool/tristate symbols are always "n" in a tristate sense,
|
|
# regardless of their value
|
|
if expr.type != BOOL and expr.type != TRISTATE:
|
|
return "n"
|
|
return expr.get_value()
|
|
|
|
if isinstance(expr, str):
|
|
return expr if (expr == "y" or expr == "m") else "n"
|
|
|
|
# Ordered by frequency
|
|
|
|
if expr[0] == AND:
|
|
res = "y"
|
|
for subexpr in expr[1]:
|
|
ev = self._eval_expr_rec(subexpr)
|
|
# Return immediately upon discovering an "n" term
|
|
if ev == "n":
|
|
return "n"
|
|
if ev == "m":
|
|
res = "m"
|
|
# 'res' is either "m" or "y" here; we already handled the
|
|
# short-circuiting "n" case in the loop.
|
|
return res
|
|
|
|
if expr[0] == NOT:
|
|
ev = self._eval_expr_rec(expr[1])
|
|
if ev == "y":
|
|
return "n"
|
|
return "y" if (ev == "n") else "m"
|
|
|
|
if expr[0] == OR:
|
|
res = "n"
|
|
for subexpr in expr[1]:
|
|
ev = self._eval_expr_rec(subexpr)
|
|
# Return immediately upon discovering a "y" term
|
|
if ev == "y":
|
|
return "y"
|
|
if ev == "m":
|
|
res = "m"
|
|
# 'res' is either "n" or "m" here; we already handled the
|
|
# short-circuiting "y" case in the loop.
|
|
return res
|
|
|
|
if expr[0] == EQUAL:
|
|
return "y" if (_str_val(expr[1]) == _str_val(expr[2])) else "n"
|
|
|
|
if expr[0] == UNEQUAL:
|
|
return "y" if (_str_val(expr[1]) != _str_val(expr[2])) else "n"
|
|
|
|
_internal_error("Internal error while evaluating expression: "
|
|
"unknown operation {0}.".format(expr[0]))
|
|
|
|
def _eval_min(self, e1, e2):
|
|
"""Returns the minimum value of the two expressions. Equates None with
|
|
'y'."""
|
|
e1_eval = self._eval_expr(e1)
|
|
e2_eval = self._eval_expr(e2)
|
|
return e1_eval if tri_less(e1_eval, e2_eval) else e2_eval
|
|
|
|
def _eval_max(self, e1, e2):
|
|
"""Returns the maximum value of the two expressions. Equates None with
|
|
'y'."""
|
|
e1_eval = self._eval_expr(e1)
|
|
e2_eval = self._eval_expr(e2)
|
|
return e1_eval if tri_greater(e1_eval, e2_eval) else e2_eval
|
|
|
|
#
|
|
# Dependency tracking (for caching and invalidation)
|
|
#
|
|
|
|
def _build_dep(self):
|
|
"""Populates the Symbol.dep sets, linking the symbol to the symbols
|
|
that immediately depend on it in the sense that changing the value of
|
|
the symbol might affect the values of those other symbols. This is used
|
|
for caching/invalidation purposes. The calculated sets might be larger
|
|
than necessary as we don't do any complicated analysis of the
|
|
expressions."""
|
|
|
|
# Adds 'sym' as a directly dependent symbol to all symbols that appear
|
|
# in the expression 'e'
|
|
def add_expr_deps(e, sym):
|
|
for s in _get_expr_syms(e):
|
|
s.dep.add(sym)
|
|
|
|
# The directly dependent symbols of a symbol are:
|
|
# - Any symbols whose prompts, default values, rev_dep (select
|
|
# condition), weak_rev_dep (imply condition) or ranges depend on the
|
|
# symbol
|
|
# - Any symbols that belong to the same choice statement as the symbol
|
|
# (these won't be included in 'dep' as that makes the dependency
|
|
# graph unwieldy, but Symbol._get_dependent() will include them)
|
|
# - Any symbols in a choice statement that depends on the symbol
|
|
for sym in self.syms_iter():
|
|
for _, e in sym.prompts:
|
|
add_expr_deps(e, sym)
|
|
|
|
for v, e in sym.def_exprs:
|
|
add_expr_deps(v, sym)
|
|
add_expr_deps(e, sym)
|
|
|
|
add_expr_deps(sym.rev_dep, sym)
|
|
add_expr_deps(sym.weak_rev_dep, sym)
|
|
|
|
for l, u, e in sym.ranges:
|
|
add_expr_deps(l, sym)
|
|
add_expr_deps(u, sym)
|
|
add_expr_deps(e, sym)
|
|
|
|
if sym.is_choice_sym:
|
|
choice = sym.parent
|
|
for _, e in choice.prompts:
|
|
add_expr_deps(e, sym)
|
|
for _, e in choice.def_exprs:
|
|
add_expr_deps(e, sym)
|
|
|
|
def _eq_to_sym(self, eq):
|
|
"""_expr_depends_on() helper. For (in)equalities of the form sym = y/m
|
|
or sym != n, returns sym. For other (in)equalities, returns None."""
|
|
relation, left, right = eq
|
|
|
|
def transform_y_m_n(item):
|
|
if item is self.y: return "y"
|
|
if item is self.m: return "m"
|
|
if item is self.n: return "n"
|
|
return item
|
|
|
|
left = transform_y_m_n(left)
|
|
right = transform_y_m_n(right)
|
|
|
|
# Make sure the symbol (if any) appears to the left
|
|
if not isinstance(left, Symbol):
|
|
left, right = right, left
|
|
if not isinstance(left, Symbol):
|
|
return None
|
|
if (relation == EQUAL and (right == "y" or right == "m")) or \
|
|
(relation == UNEQUAL and right == "n"):
|
|
return left
|
|
return None
|
|
|
|
def _expr_depends_on(self, expr, sym):
|
|
"""Reimplementation of expr_depends_symbol() from mconf.c. Used to
|
|
determine if a submenu should be implicitly created, which influences
|
|
what items inside choice statements are considered choice items."""
|
|
if expr is None:
|
|
return False
|
|
|
|
def rec(expr):
|
|
if isinstance(expr, str):
|
|
return False
|
|
if isinstance(expr, Symbol):
|
|
return expr is sym
|
|
|
|
if expr[0] in (EQUAL, UNEQUAL):
|
|
return self._eq_to_sym(expr) is sym
|
|
if expr[0] == AND:
|
|
for and_expr in expr[1]:
|
|
if rec(and_expr):
|
|
return True
|
|
return False
|
|
|
|
return rec(expr)
|
|
|
|
def _invalidate_all(self):
|
|
for sym in self.syms_iter():
|
|
sym._invalidate()
|
|
|
|
#
|
|
# Printing and misc.
|
|
#
|
|
|
|
def _expand_sym_refs(self, s):
|
|
"""Expands $-references to symbols in 's' to symbol values, or to the
|
|
empty string for undefined symbols."""
|
|
|
|
while 1:
|
|
sym_ref_match = _sym_ref_re_search(s)
|
|
if sym_ref_match is None:
|
|
return s
|
|
|
|
sym_name = sym_ref_match.group(0)[1:]
|
|
sym = self.syms.get(sym_name)
|
|
expansion = "" if sym is None else sym.get_value()
|
|
|
|
s = s[:sym_ref_match.start()] + \
|
|
expansion + \
|
|
s[sym_ref_match.end():]
|
|
|
|
def _expr_val_str(self, expr, no_value_str="(none)",
|
|
get_val_instead_of_eval=False):
|
|
"""Printing helper. Returns a string with 'expr' and its value.
|
|
|
|
no_value_str: String to return when 'expr' is missing (None).
|
|
|
|
get_val_instead_of_eval: Assume 'expr' is a symbol or string (constant
|
|
symbol) and get its value directly instead of evaluating it to a
|
|
tristate value."""
|
|
|
|
if expr is None:
|
|
return no_value_str
|
|
|
|
if get_val_instead_of_eval:
|
|
if isinstance(expr, str):
|
|
return _expr_to_str(expr)
|
|
val = expr.get_value()
|
|
else:
|
|
val = self._eval_expr(expr)
|
|
|
|
return "{0} (value: {1})".format(_expr_to_str(expr), _expr_to_str(val))
|
|
|
|
def _get_sym_or_choice_str(self, sc):
|
|
"""Symbols and choices have many properties in common, so we factor out
|
|
common __str__() stuff here. "sc" is short for "symbol or choice"."""
|
|
|
|
# As we deal a lot with string representations here, use some
|
|
# convenient shorthand:
|
|
s = _expr_to_str
|
|
|
|
#
|
|
# Common symbol/choice properties
|
|
#
|
|
|
|
user_val_str = "(no user value)" if sc.user_val is None else \
|
|
s(sc.user_val)
|
|
|
|
# Build prompts string
|
|
if not sc.prompts:
|
|
prompts_str = " (no prompts)"
|
|
else:
|
|
prompts_str_rows = []
|
|
for prompt, cond_expr in sc.orig_prompts:
|
|
prompts_str_rows.append(
|
|
' "{0}"'.format(prompt) if cond_expr is None else
|
|
' "{0}" if {1}'.format(prompt,
|
|
self._expr_val_str(cond_expr)))
|
|
prompts_str = "\n".join(prompts_str_rows)
|
|
|
|
# Build locations string
|
|
locations_str = "(no locations)" if not sc.def_locations else \
|
|
" ".join(["{0}:{1}".format(filename, linenr) for
|
|
filename, linenr in sc.def_locations])
|
|
|
|
# Build additional-dependencies-from-menus-and-ifs string
|
|
additional_deps_str = " " + \
|
|
self._expr_val_str(sc.deps_from_containing,
|
|
"(no additional dependencies)")
|
|
|
|
#
|
|
# Symbol-specific stuff
|
|
#
|
|
|
|
if isinstance(sc, Symbol):
|
|
# Build ranges string
|
|
if isinstance(sc, Symbol):
|
|
if not sc.ranges:
|
|
ranges_str = " (no ranges)"
|
|
else:
|
|
ranges_str_rows = []
|
|
for l, u, cond_expr in sc.ranges:
|
|
ranges_str_rows.append(
|
|
" [{0}, {1}]".format(s(l), s(u))
|
|
if cond_expr is None else
|
|
" [{0}, {1}] if {2}"
|
|
.format(s(l), s(u), self._expr_val_str(cond_expr)))
|
|
ranges_str = "\n".join(ranges_str_rows)
|
|
|
|
# Build default values string
|
|
if not sc.def_exprs:
|
|
defaults_str = " (no default values)"
|
|
else:
|
|
defaults_str_rows = []
|
|
for val_expr, cond_expr in sc.orig_def_exprs:
|
|
row_str = " " + self._expr_val_str(val_expr, "(none)",
|
|
sc.type == STRING)
|
|
defaults_str_rows.append(row_str)
|
|
defaults_str_rows.append(" Condition: " +
|
|
self._expr_val_str(cond_expr))
|
|
defaults_str = "\n".join(defaults_str_rows)
|
|
|
|
# Build selects string
|
|
if not sc.orig_selects:
|
|
selects_str = " (no selects)"
|
|
else:
|
|
selects_str_rows = []
|
|
for target, cond_expr in sc.orig_selects:
|
|
selects_str_rows.append(
|
|
" {0}".format(target.name) if cond_expr is None else
|
|
" {0} if {1}".format(target.name,
|
|
self._expr_val_str(cond_expr)))
|
|
selects_str = "\n".join(selects_str_rows)
|
|
|
|
# Build implies string
|
|
if not sc.orig_implies:
|
|
implies_str = " (no implies)"
|
|
else:
|
|
implies_str_rows = []
|
|
for target, cond_expr in sc.orig_implies:
|
|
implies_str_rows.append(
|
|
" {0}".format(target.name) if cond_expr is None else
|
|
" {0} if {1}".format(target.name,
|
|
self._expr_val_str(cond_expr)))
|
|
implies_str = "\n".join(implies_str_rows)
|
|
|
|
res = _lines("Symbol " +
|
|
("(no name)" if sc.name is None else sc.name),
|
|
"Type : " + TYPENAME[sc.type],
|
|
"Value : " + s(sc.get_value()),
|
|
"User value : " + user_val_str,
|
|
"Visibility : " + s(_get_visibility(sc)),
|
|
"Is choice item : " + BOOL_STR[sc.is_choice_sym],
|
|
"Is defined : " + BOOL_STR[sc.is_defined_],
|
|
"Is from env. : " + BOOL_STR[sc.is_from_env],
|
|
"Is special : " + BOOL_STR[sc.is_special_] + "\n")
|
|
if sc.ranges:
|
|
res += _lines("Ranges:", ranges_str + "\n")
|
|
res += _lines("Prompts:",
|
|
prompts_str,
|
|
"Default values:",
|
|
defaults_str,
|
|
"Selects:",
|
|
selects_str,
|
|
"Implies:",
|
|
implies_str,
|
|
"Reverse (select-related) dependencies:",
|
|
" (no reverse dependencies)"
|
|
if sc.rev_dep == "n"
|
|
else " " + self._expr_val_str(sc.rev_dep),
|
|
"Weak reverse (imply-related) dependencies:",
|
|
" (no weak reverse dependencies)"
|
|
if sc.weak_rev_dep == "n"
|
|
else " " + self._expr_val_str(sc.weak_rev_dep),
|
|
"Additional dependencies from enclosing menus "
|
|
"and ifs:",
|
|
additional_deps_str,
|
|
"Locations: " + locations_str)
|
|
|
|
return res
|
|
|
|
#
|
|
# Choice-specific stuff
|
|
#
|
|
|
|
# Build selected symbol string
|
|
sel = sc.get_selection()
|
|
sel_str = "(no selection)" if sel is None else sel.name
|
|
|
|
# Build default values string
|
|
if not sc.def_exprs:
|
|
defaults_str = " (no default values)"
|
|
else:
|
|
defaults_str_rows = []
|
|
for sym, cond_expr in sc.orig_def_exprs:
|
|
defaults_str_rows.append(
|
|
" {0}".format(sym.name) if cond_expr is None else
|
|
" {0} if {1}".format(sym.name,
|
|
self._expr_val_str(cond_expr)))
|
|
defaults_str = "\n".join(defaults_str_rows)
|
|
|
|
# Build contained symbols string
|
|
names = [sym.name for sym in sc.actual_symbols]
|
|
syms_string = " ".join(names) if names else "(empty)"
|
|
|
|
return _lines("Choice",
|
|
"Name (for named choices): " +
|
|
("(no name)" if sc.name is None else sc.name),
|
|
"Type : " + TYPENAME[sc.type],
|
|
"Selected symbol : " + sel_str,
|
|
"User value : " + user_val_str,
|
|
"Mode : " + s(sc.get_mode()),
|
|
"Visibility : " + s(_get_visibility(sc)),
|
|
"Optional : " + BOOL_STR[sc.optional],
|
|
"Prompts:",
|
|
prompts_str,
|
|
"Defaults:",
|
|
defaults_str,
|
|
"Choice symbols:",
|
|
" " + syms_string,
|
|
"Additional dependencies from enclosing menus and "
|
|
"ifs:",
|
|
additional_deps_str,
|
|
"Locations: " + locations_str)
|
|
|
|
def _warn(self, msg, filename=None, linenr=None):
|
|
"""For printing warnings to stderr."""
|
|
msg = _build_msg("warning: " + msg, filename, linenr)
|
|
if self.print_warnings:
|
|
sys.stderr.write(msg + "\n")
|
|
self._warnings.append(msg)
|
|
|
|
class Item(object):
|
|
|
|
"""Base class for symbols and other Kconfig constructs. Subclasses are
|
|
Symbol, Choice, Menu, and Comment."""
|
|
|
|
def is_symbol(self):
|
|
"""Returns True if the item is a symbol. Short for
|
|
isinstance(item, kconfiglib.Symbol)."""
|
|
return isinstance(self, Symbol)
|
|
|
|
def is_choice(self):
|
|
"""Returns True if the item is a choice. Short for
|
|
isinstance(item, kconfiglib.Choice)."""
|
|
return isinstance(self, Choice)
|
|
|
|
def is_menu(self):
|
|
"""Returns True if the item is a menu. Short for
|
|
isinstance(item, kconfiglib.Menu)."""
|
|
return isinstance(self, Menu)
|
|
|
|
def is_comment(self):
|
|
"""Returns True if the item is a comment. Short for
|
|
isinstance(item, kconfiglib.Comment)."""
|
|
return isinstance(self, Comment)
|
|
|
|
class Symbol(Item):
|
|
|
|
"""Represents a configuration symbol - e.g. FOO for
|
|
|
|
config FOO
|
|
..."""
|
|
|
|
#
|
|
# Public interface
|
|
#
|
|
|
|
def get_config(self):
|
|
"""Returns the Config instance this symbol is from."""
|
|
return self.config
|
|
|
|
def get_name(self):
|
|
"""Returns the name of the symbol."""
|
|
return self.name
|
|
|
|
def get_type(self):
|
|
"""Returns the type of the symbol: one of UNKNOWN, BOOL, TRISTATE,
|
|
STRING, HEX, or INT. These are defined at the top level of the module,
|
|
so you'd do something like
|
|
|
|
if sym.get_type() == kconfiglib.STRING:
|
|
..."""
|
|
return self.type
|
|
|
|
def get_prompts(self):
|
|
"""Returns a list of prompts defined for the symbol, in the order they
|
|
appear in the configuration files. Returns the empty list for symbols
|
|
with no prompt.
|
|
|
|
This list will have a single entry for the vast majority of symbols
|
|
having prompts, but having multiple prompts for a single symbol is
|
|
possible through having multiple 'config' entries for it."""
|
|
return [prompt for prompt, _ in self.orig_prompts]
|
|
|
|
def get_help(self):
|
|
"""Returns the help text of the symbol, or None if the symbol has no
|
|
help text."""
|
|
return self.help
|
|
|
|
def get_parent(self):
|
|
"""Returns the menu or choice statement that contains the symbol, or
|
|
None if the symbol is at the top level. Note that if statements are
|
|
treated as syntactic and do not have an explicit class
|
|
representation."""
|
|
return self.parent
|
|
|
|
def get_def_locations(self):
|
|
"""Returns a list of (filename, linenr) tuples, where filename (string)
|
|
and linenr (int) represent a location where the symbol is defined. For
|
|
the vast majority of symbols this list will only contain one element.
|
|
For the following Kconfig, FOO would get two entries: the lines marked
|
|
with *.
|
|
|
|
config FOO *
|
|
bool "foo prompt 1"
|
|
|
|
config FOO *
|
|
bool "foo prompt 2"
|
|
"""
|
|
return self.def_locations
|
|
|
|
def get_ref_locations(self):
|
|
"""Returns a list of (filename, linenr) tuples, where filename (string)
|
|
and linenr (int) represent a location where the symbol is referenced in
|
|
the configuration. For example, the lines marked by * would be included
|
|
for FOO below:
|
|
|
|
config A
|
|
bool
|
|
default BAR || FOO *
|
|
|
|
config B
|
|
tristate
|
|
depends on FOO *
|
|
default m if FOO *
|
|
|
|
if FOO *
|
|
config A
|
|
bool "A"
|
|
endif
|
|
|
|
config FOO (definition not included)
|
|
bool
|
|
"""
|
|
return self.ref_locations
|
|
|
|
def get_value(self):
|
|
"""Calculate and return the value of the symbol. See also
|
|
Symbol.set_user_value()."""
|
|
|
|
if self.cached_val is not None:
|
|
return self.cached_val
|
|
|
|
# As a quirk of Kconfig, undefined symbols get their name as their
|
|
# value. This is why things like "FOO = bar" work for seeing if FOO has
|
|
# the value "bar".
|
|
if self.type == UNKNOWN:
|
|
self.cached_val = self.name
|
|
return self.name
|
|
|
|
new_val = DEFAULT_VALUE[self.type]
|
|
vis = _get_visibility(self)
|
|
|
|
# This is easiest to calculate together with the value
|
|
self.write_to_conf = False
|
|
|
|
if self.type == BOOL or self.type == TRISTATE:
|
|
# The visibility and mode (modules-only or single-selection) of
|
|
# choice items will be taken into account in _get_visibility()
|
|
if self.is_choice_sym:
|
|
if vis != "n":
|
|
choice = self.parent
|
|
mode = choice.get_mode()
|
|
|
|
self.write_to_conf = (mode != "n")
|
|
|
|
if mode == "y":
|
|
new_val = "y" if choice.get_selection() is self \
|
|
else "n"
|
|
elif mode == "m":
|
|
if self.user_val == "m" or self.user_val == "y":
|
|
new_val = "m"
|
|
|
|
else:
|
|
# If the symbol is visible and has a user value, use that.
|
|
# Otherwise, look at defaults and weak reverse dependencies
|
|
# (implies).
|
|
use_defaults_and_weak_rev_deps = True
|
|
|
|
if vis != "n":
|
|
self.write_to_conf = True
|
|
if self.user_val is not None:
|
|
new_val = self.config._eval_min(self.user_val, vis)
|
|
use_defaults_and_weak_rev_deps = False
|
|
|
|
if use_defaults_and_weak_rev_deps:
|
|
for val_expr, cond_expr in self.def_exprs:
|
|
cond_eval = self.config._eval_expr(cond_expr)
|
|
if cond_eval != "n":
|
|
self.write_to_conf = True
|
|
new_val = self.config._eval_min(val_expr,
|
|
cond_eval)
|
|
break
|
|
|
|
weak_rev_dep_val = \
|
|
self.config._eval_expr(self.weak_rev_dep)
|
|
if weak_rev_dep_val != "n":
|
|
self.write_to_conf = True
|
|
new_val = self.config._eval_max(new_val,
|
|
weak_rev_dep_val)
|
|
|
|
# Reverse (select-related) dependencies take precedence
|
|
rev_dep_val = self.config._eval_expr(self.rev_dep)
|
|
if rev_dep_val != "n":
|
|
self.write_to_conf = True
|
|
new_val = self.config._eval_max(new_val, rev_dep_val)
|
|
|
|
# We need to promote "m" to "y" in two circumstances:
|
|
# 1) If our type is boolean
|
|
# 2) If our weak_rev_dep (from IMPLY) is "y"
|
|
if new_val == "m" and \
|
|
(self.type == BOOL or
|
|
self.config._eval_expr(self.weak_rev_dep) == "y"):
|
|
new_val = "y"
|
|
|
|
elif self.type == INT or self.type == HEX:
|
|
has_active_range = False
|
|
low = None
|
|
high = None
|
|
use_defaults = True
|
|
|
|
base = 16 if self.type == HEX else 10
|
|
|
|
for l, h, cond_expr in self.ranges:
|
|
if self.config._eval_expr(cond_expr) != "n":
|
|
has_active_range = True
|
|
|
|
low_str = _str_val(l)
|
|
high_str = _str_val(h)
|
|
low = int(low_str, base) if \
|
|
_is_base_n(low_str, base) else 0
|
|
high = int(high_str, base) if \
|
|
_is_base_n(high_str, base) else 0
|
|
|
|
break
|
|
|
|
if vis != "n":
|
|
self.write_to_conf = True
|
|
|
|
if self.user_val is not None and \
|
|
_is_base_n(self.user_val, base) and \
|
|
(not has_active_range or
|
|
low <= int(self.user_val, base) <= high):
|
|
|
|
# If the user value is OK, it is stored in exactly the same
|
|
# form as specified in the assignment (with or without
|
|
# "0x", etc).
|
|
|
|
use_defaults = False
|
|
new_val = self.user_val
|
|
|
|
if use_defaults:
|
|
for val_expr, cond_expr in self.def_exprs:
|
|
if self.config._eval_expr(cond_expr) != "n":
|
|
self.write_to_conf = True
|
|
|
|
# If the default value is OK, it is stored in exactly
|
|
# the same form as specified. Otherwise, it is clamped
|
|
# to the range, and the output has "0x" as appropriate
|
|
# for the type.
|
|
|
|
new_val = _str_val(val_expr)
|
|
|
|
if _is_base_n(new_val, base):
|
|
new_val_num = int(new_val, base)
|
|
if has_active_range:
|
|
clamped_val = None
|
|
|
|
if new_val_num < low:
|
|
clamped_val = low
|
|
elif new_val_num > high:
|
|
clamped_val = high
|
|
|
|
if clamped_val is not None:
|
|
new_val = (hex(clamped_val) if \
|
|
self.type == HEX else str(clamped_val))
|
|
|
|
break
|
|
else: # For the for loop
|
|
# If no user value or default kicks in but the hex/int has
|
|
# an active range, then the low end of the range is used,
|
|
# provided it's > 0, with "0x" prepended as appropriate.
|
|
if has_active_range and low > 0:
|
|
new_val = (hex(low) if self.type == HEX else str(low))
|
|
|
|
elif self.type == STRING:
|
|
use_defaults = True
|
|
|
|
if vis != "n":
|
|
self.write_to_conf = True
|
|
if self.user_val is not None:
|
|
new_val = self.user_val
|
|
use_defaults = False
|
|
|
|
if use_defaults:
|
|
for val_expr, cond_expr in self.def_exprs:
|
|
if self.config._eval_expr(cond_expr) != "n":
|
|
self.write_to_conf = True
|
|
new_val = _str_val(val_expr)
|
|
break
|
|
|
|
self.cached_val = new_val
|
|
return new_val
|
|
|
|
def get_user_value(self):
|
|
"""Returns the value assigned to the symbol in a .config or via
|
|
Symbol.set_user_value() (provided the value was valid for the type of
|
|
the symbol). Returns None in case of no user value."""
|
|
return self.user_val
|
|
|
|
def get_upper_bound(self):
|
|
"""For string/hex/int symbols and for bool and tristate symbols that
|
|
cannot be modified (see is_modifiable()), returns None.
|
|
|
|
Otherwise, returns the highest value the symbol can be set to with
|
|
Symbol.set_user_value() (that will not be truncated): one of "m" or
|
|
"y", arranged from lowest to highest. This corresponds to the highest
|
|
value the symbol could be given in e.g. the 'make menuconfig'
|
|
interface.
|
|
|
|
See also the tri_less*() and tri_greater*() functions, which could come
|
|
in handy."""
|
|
if self.type != BOOL and self.type != TRISTATE:
|
|
return None
|
|
rev_dep = self.config._eval_expr(self.rev_dep)
|
|
# A bool selected to "m" gets promoted to "y", pinning it
|
|
if rev_dep == "m" and self.type == BOOL:
|
|
return None
|
|
vis = _get_visibility(self)
|
|
if TRI_TO_INT[vis] > TRI_TO_INT[rev_dep]:
|
|
return vis
|
|
return None
|
|
|
|
def get_lower_bound(self):
|
|
"""For string/hex/int symbols and for bool and tristate symbols that
|
|
cannot be modified (see is_modifiable()), returns None.
|
|
|
|
Otherwise, returns the lowest value the symbol can be set to with
|
|
Symbol.set_user_value() (that will not be truncated): one of "n" or
|
|
"m", arranged from lowest to highest. This corresponds to the lowest
|
|
value the symbol could be given in e.g. the 'make menuconfig'
|
|
interface.
|
|
|
|
See also the tri_less*() and tri_greater*() functions, which could come
|
|
in handy."""
|
|
if self.type != BOOL and self.type != TRISTATE:
|
|
return None
|
|
rev_dep = self.config._eval_expr(self.rev_dep)
|
|
# A bool selected to "m" gets promoted to "y", pinning it
|
|
if rev_dep == "m" and self.type == BOOL:
|
|
return None
|
|
if TRI_TO_INT[_get_visibility(self)] > TRI_TO_INT[rev_dep]:
|
|
return rev_dep
|
|
return None
|
|
|
|
def get_assignable_values(self):
|
|
"""For string/hex/int symbols and for bool and tristate symbols that
|
|
cannot be modified (see is_modifiable()), returns the empty list.
|
|
|
|
Otherwise, returns a list containing the user values that can be
|
|
assigned to the symbol (that won't be truncated). Usage example:
|
|
|
|
if "m" in sym.get_assignable_values():
|
|
sym.set_user_value("m")
|
|
|
|
This is basically a more convenient interface to
|
|
get_lower/upper_bound() when wanting to test if a particular tristate
|
|
value can be assigned."""
|
|
if self.type != BOOL and self.type != TRISTATE:
|
|
return []
|
|
rev_dep = self.config._eval_expr(self.rev_dep)
|
|
# A bool selected to "m" gets promoted to "y", pinning it
|
|
if rev_dep == "m" and self.type == BOOL:
|
|
return []
|
|
res = ["n", "m", "y"][TRI_TO_INT[rev_dep] :
|
|
TRI_TO_INT[_get_visibility(self)] + 1]
|
|
return res if len(res) > 1 else []
|
|
|
|
def get_visibility(self):
|
|
"""Returns the visibility of the symbol: one of "n", "m" or "y". For
|
|
bool and tristate symbols, this is an upper bound on the value users
|
|
can set for the symbol. For other types of symbols, a visibility of "n"
|
|
means the user value will be ignored. A visibility of "n" corresponds
|
|
to not being visible in the 'make *config' interfaces.
|
|
|
|
Example (assuming we're running with modules enabled -- i.e., MODULES
|
|
set to 'y'):
|
|
|
|
# Assume this has been assigned 'n'
|
|
config N_SYM
|
|
tristate "N_SYM"
|
|
|
|
# Assume this has been assigned 'm'
|
|
config M_SYM
|
|
tristate "M_SYM"
|
|
|
|
# Has visibility 'n'
|
|
config A
|
|
tristate "A"
|
|
depends on N_SYM
|
|
|
|
# Has visibility 'm'
|
|
config B
|
|
tristate "B"
|
|
depends on M_SYM
|
|
|
|
# Has visibility 'y'
|
|
config C
|
|
tristate "C"
|
|
|
|
# Has no prompt, and hence visibility 'n'
|
|
config D
|
|
tristate
|
|
|
|
Having visibility be tri-valued ensures that e.g. a symbol cannot be
|
|
set to "y" by the user if it depends on a symbol with value "m", which
|
|
wouldn't be safe.
|
|
|
|
You should probably look at get_lower/upper_bound(),
|
|
get_assignable_values() and is_modifiable() before using this."""
|
|
return _get_visibility(self)
|
|
|
|
def get_referenced_symbols(self, refs_from_enclosing=False):
|
|
"""Returns the set() of all symbols referenced by this symbol. For
|
|
example, the symbol defined by
|
|
|
|
config FOO
|
|
bool
|
|
prompt "foo" if A && B
|
|
default C if D
|
|
depends on E
|
|
select F if G
|
|
|
|
references the symbols A through G.
|
|
|
|
refs_from_enclosing (default: False): If True, the symbols referenced
|
|
by enclosing menus and ifs will be included in the result."""
|
|
return self.all_referenced_syms if refs_from_enclosing else \
|
|
self.referenced_syms
|
|
|
|
def get_selected_symbols(self):
|
|
"""Returns the set() of all symbols X for which this symbol has a
|
|
'select X' or 'select X if Y' (regardless of whether Y is satisfied or
|
|
not). This is a subset of the symbols returned by
|
|
get_referenced_symbols()."""
|
|
return self.selected_syms
|
|
|
|
def get_implied_symbols(self):
|
|
"""Returns the set() of all symbols X for which this symbol has an
|
|
'imply X' or 'imply X if Y' (regardless of whether Y is satisfied or
|
|
not). This is a subset of the symbols returned by
|
|
get_referenced_symbols()."""
|
|
return self.implied_syms
|
|
|
|
def set_user_value(self, v):
|
|
"""Sets the user value of the symbol.
|
|
|
|
Equal in effect to assigning the value to the symbol within a .config
|
|
file. Use get_lower/upper_bound() or get_assignable_values() to find
|
|
the range of currently assignable values for bool and tristate symbols;
|
|
setting values outside this range will cause the user value to differ
|
|
from the result of Symbol.get_value() (be truncated). Values that are
|
|
invalid for the type (such as a_bool.set_user_value("foo")) are
|
|
ignored, and a warning is emitted if an attempt is made to assign such
|
|
a value.
|
|
|
|
For any type of symbol, is_modifiable() can be used to check if a user
|
|
value will currently have any effect on the symbol, as determined by
|
|
its visibility and range of assignable values. Any value that is valid
|
|
for the type (bool, tristate, etc.) will end up being reflected in
|
|
get_user_value() though, and might have an effect later if conditions
|
|
change. To get rid of the user value, use unset_user_value().
|
|
|
|
Any symbols dependent on the symbol are (recursively) invalidated, so
|
|
things will just work with regards to dependencies.
|
|
|
|
v: The user value to give to the symbol."""
|
|
self._set_user_value_no_invalidate(v, False)
|
|
|
|
# There might be something more efficient you could do here, but play
|
|
# it safe.
|
|
if self.name == "MODULES":
|
|
self.config._invalidate_all()
|
|
return
|
|
|
|
self._invalidate()
|
|
self._invalidate_dependent()
|
|
|
|
def unset_user_value(self):
|
|
"""Resets the user value of the symbol, as if the symbol had never
|
|
gotten a user value via Config.load_config() or
|
|
Symbol.set_user_value()."""
|
|
self._unset_user_value_no_recursive_invalidate()
|
|
self._invalidate_dependent()
|
|
|
|
def is_modifiable(self):
|
|
"""Returns True if the value of the symbol could be modified by calling
|
|
Symbol.set_user_value().
|
|
|
|
For bools and tristates, this corresponds to the symbol being visible
|
|
in the 'make menuconfig' interface and not already being pinned to a
|
|
specific value (e.g. because it is selected by another symbol).
|
|
|
|
For strings and numbers, this corresponds to just being visible. (See
|
|
Symbol.get_visibility().)"""
|
|
if self.is_special_:
|
|
return False
|
|
if self.type == BOOL or self.type == TRISTATE:
|
|
rev_dep = self.config._eval_expr(self.rev_dep)
|
|
# A bool selected to "m" gets promoted to "y", pinning it
|
|
if rev_dep == "m" and self.type == BOOL:
|
|
return False
|
|
return TRI_TO_INT[_get_visibility(self)] > TRI_TO_INT[rev_dep]
|
|
return _get_visibility(self) != "n"
|
|
|
|
def is_defined(self):
|
|
"""Returns False if the symbol is referred to in the Kconfig but never
|
|
actually defined."""
|
|
return self.is_defined_
|
|
|
|
def is_special(self):
|
|
"""Returns True if the symbol is one of the special symbols n, m, y, or
|
|
UNAME_RELEASE, or gets its value from the environment."""
|
|
return self.is_special_
|
|
|
|
def is_from_environment(self):
|
|
"""Returns True if the symbol gets its value from the environment."""
|
|
return self.is_from_env
|
|
|
|
def has_ranges(self):
|
|
"""Returns True if the symbol is of type INT or HEX and has ranges that
|
|
limit what values it can take on."""
|
|
return bool(self.ranges)
|
|
|
|
def is_choice_symbol(self):
|
|
"""Returns True if the symbol is in a choice statement and is an actual
|
|
choice symbol (see Choice.get_symbols())."""
|
|
return self.is_choice_sym
|
|
|
|
def is_choice_selection(self):
|
|
"""Returns True if the symbol is contained in a choice statement and is
|
|
the selected item. Equivalent to
|
|
|
|
sym.is_choice_symbol() and sym.get_parent().get_selection() is sym"""
|
|
return self.is_choice_sym and self.parent.get_selection() is self
|
|
|
|
def is_allnoconfig_y(self):
|
|
"""Returns True if the symbol has the 'allnoconfig_y' option set."""
|
|
return self.allnoconfig_y
|
|
|
|
def __str__(self):
|
|
"""Returns a string containing various information about the symbol."""
|
|
return self.config._get_sym_or_choice_str(self)
|
|
|
|
#
|
|
# Private methods
|
|
#
|
|
|
|
def __init__(self):
|
|
"""Symbol constructor -- not intended to be called directly by
|
|
Kconfiglib clients."""
|
|
|
|
self.name = None
|
|
self.type = UNKNOWN
|
|
self.prompts = []
|
|
self.def_exprs = [] # 'default' properties
|
|
self.ranges = [] # 'range' properties (for int and hex)
|
|
self.help = None # Help text
|
|
self.rev_dep = "n" # Reverse (select-related) dependencies
|
|
self.weak_rev_dep = "n" # Weak reverse (imply-related) dependencies
|
|
self.config = None
|
|
self.parent = None
|
|
|
|
self.user_val = None # Value set by user
|
|
|
|
# The prompt, default value, select, and imply conditions without any
|
|
# dependencies from menus and ifs propagated to them
|
|
self.orig_prompts = []
|
|
self.orig_def_exprs = []
|
|
self.orig_selects = []
|
|
self.orig_implies = []
|
|
|
|
# Dependencies inherited from containing menus and ifs
|
|
self.deps_from_containing = None
|
|
# The set of symbols referenced by this symbol (see
|
|
# get_referenced_symbols())
|
|
self.referenced_syms = set()
|
|
# The set of symbols selected by this symbol (see
|
|
# get_selected_symbols())
|
|
self.selected_syms = set()
|
|
# The set of symbols implied by this symbol (see get_implied_symbols())
|
|
self.implied_syms = set()
|
|
# Like 'referenced_syms', but includes symbols from
|
|
# dependencies inherited from enclosing menus and ifs
|
|
self.all_referenced_syms = set()
|
|
|
|
# This records only dependencies from enclosing ifs and menus together
|
|
# with local 'depends on' dependencies. Needed when determining actual
|
|
# choice items (hrrrr...). See Choice._determine_actual_symbols().
|
|
self.menu_dep = None
|
|
|
|
# See Symbol.get_ref/def_locations().
|
|
self.def_locations = []
|
|
self.ref_locations = []
|
|
|
|
# Populated in Config._build_dep() after parsing. Links the symbol to
|
|
# the symbols that immediately depend on it (in a caching/invalidation
|
|
# sense). The total set of dependent symbols for the symbol (the
|
|
# transitive closure) is calculated on an as-needed basis in
|
|
# _get_dependent().
|
|
self.dep = set()
|
|
|
|
# Cached values
|
|
|
|
# Caches the calculated value
|
|
self.cached_val = None
|
|
# Caches the visibility, which acts as an upper bound on the value
|
|
self.cached_visibility = None
|
|
# Caches the total list of dependent symbols. Calculated in
|
|
# _get_dependent().
|
|
self.cached_deps = None
|
|
|
|
# Flags
|
|
|
|
# Does the symbol have an entry in the Kconfig file? The trailing
|
|
# underscore avoids a collision with is_defined().
|
|
self.is_defined_ = False
|
|
# Should the symbol get an entry in .config?
|
|
self.write_to_conf = False
|
|
# Set to true when _make_conf() is called on a symbol, so that symbols
|
|
# defined in multiple locations only get one .config entry. We need to
|
|
# reset it prior to writing out a new .config.
|
|
self.already_written = False
|
|
# This is set to True for "actual" choice symbols; see
|
|
# Choice._determine_actual_symbols().
|
|
self.is_choice_sym = False
|
|
# Does the symbol get its value in some special way, e.g. from the
|
|
# environment or by being one of the special symbols n, m, and y? If
|
|
# so, the value is stored in self.cached_val, which is never
|
|
# invalidated. The trailing underscore avoids a collision with
|
|
# is_special().
|
|
self.is_special_ = False
|
|
# Does the symbol get its value from the environment?
|
|
self.is_from_env = False
|
|
# Does the symbol have the 'allnoconfig_y' option set?
|
|
self.allnoconfig_y = False
|
|
|
|
def _invalidate(self):
|
|
if self.is_special_:
|
|
return
|
|
|
|
if self.is_choice_sym:
|
|
self.parent._invalidate()
|
|
|
|
self.cached_val = None
|
|
self.cached_visibility = None
|
|
|
|
def _invalidate_dependent(self):
|
|
for sym in self._get_dependent():
|
|
sym._invalidate()
|
|
|
|
def _set_user_value_no_invalidate(self, v, suppress_load_warnings):
|
|
"""Like set_user_value(), but does not invalidate any symbols.
|
|
|
|
suppress_load_warnings: some warnings are annoying when loading a
|
|
.config that can be helpful when manually invoking set_user_value().
|
|
This flag is set to True to suppress such warnings.
|
|
|
|
Perhaps this could be made optional for load_config() instead."""
|
|
|
|
if self.is_special_:
|
|
if self.is_from_env:
|
|
self.config._warn('attempt to assign the value "{0}" to the '
|
|
'symbol {1}, which gets its value from the '
|
|
'environment. Assignment ignored.'
|
|
.format(v, self.name))
|
|
else:
|
|
self.config._warn('attempt to assign the value "{0}" to the '
|
|
'special symbol {1}. Assignment ignored.'
|
|
.format(v, self.name))
|
|
return
|
|
|
|
if not self.is_defined_:
|
|
filename, linenr = self.ref_locations[0]
|
|
if self.config.print_undef_assign:
|
|
_stderr_msg('note: attempt to assign the value "{0}" to {1}, '
|
|
"which is referenced at {2}:{3} but never "
|
|
"defined. Assignment ignored."
|
|
.format(v, self.name, filename, linenr))
|
|
return
|
|
|
|
# Check if the value is valid for our type
|
|
if not ((self.type == BOOL and (v == "y" or v == "n") ) or
|
|
(self.type == TRISTATE and (v == "y" or v == "m" or
|
|
v == "n") ) or
|
|
(self.type == STRING ) or
|
|
(self.type == INT and _is_base_n(v, 10) ) or
|
|
(self.type == HEX and _is_base_n(v, 16) )):
|
|
self.config._warn('the value "{0}" is invalid for {1}, which has '
|
|
"type {2}. Assignment ignored."
|
|
.format(v, self.name, TYPENAME[self.type]))
|
|
return
|
|
|
|
if not self.prompts and not suppress_load_warnings:
|
|
self.config._warn('assigning "{0}" to the symbol {1} which '
|
|
'lacks prompts and thus has visibility "n". '
|
|
'The assignment will have no effect.'
|
|
.format(v, self.name))
|
|
|
|
self.user_val = v
|
|
|
|
if self.is_choice_sym and (self.type == BOOL or self.type == TRISTATE):
|
|
choice = self.parent
|
|
if v == "y":
|
|
choice.user_val = self
|
|
choice.user_mode = "y"
|
|
elif v == "m":
|
|
choice.user_val = None
|
|
choice.user_mode = "m"
|
|
|
|
def _unset_user_value_no_recursive_invalidate(self):
|
|
self._invalidate()
|
|
self.user_val = None
|
|
|
|
if self.is_choice_sym:
|
|
self.parent._unset_user_value()
|
|
|
|
def _make_conf(self, append_fn):
|
|
if self.already_written:
|
|
return
|
|
|
|
self.already_written = True
|
|
|
|
# Note: write_to_conf is determined in get_value()
|
|
val = self.get_value()
|
|
if not self.write_to_conf:
|
|
return
|
|
|
|
if self.type == BOOL or self.type == TRISTATE:
|
|
append_fn("{0}{1}={2}".format(self.config.config_prefix, self.name, val)
|
|
if val == "y" or val == "m" else
|
|
"# {0}{1} is not set".format(self.config.config_prefix, self.name))
|
|
|
|
elif self.type == INT or self.type == HEX:
|
|
append_fn("{0}{1}={2}".format(self.config.config_prefix, self.name, val))
|
|
|
|
elif self.type == STRING:
|
|
# Escape \ and "
|
|
append_fn('{0}{1}="{2}"'
|
|
.format(self.config.config_prefix, self.name,
|
|
val.replace("\\", "\\\\").replace('"', '\\"')))
|
|
|
|
else:
|
|
_internal_error("Internal error while creating .config: unknown "
|
|
'type "{0}".'.format(self.type))
|
|
|
|
def _get_dependent(self):
|
|
"""Returns the set of symbols that should be invalidated if the value
|
|
of the symbol changes, because they might be affected by the change.
|
|
Note that this is an internal API -- it's probably of limited
|
|
usefulness to clients."""
|
|
if self.cached_deps is not None:
|
|
return self.cached_deps
|
|
|
|
res = set(self.dep)
|
|
for s in self.dep:
|
|
res |= s._get_dependent()
|
|
|
|
if self.is_choice_sym:
|
|
# Choice symbols also depend (recursively) on their siblings. The
|
|
# siblings are not included in 'dep' to avoid dependency loops.
|
|
for sibling in self.parent.actual_symbols:
|
|
if sibling is not self:
|
|
res.add(sibling)
|
|
res |= sibling.dep
|
|
for s in sibling.dep:
|
|
res |= s._get_dependent()
|
|
|
|
self.cached_deps = res
|
|
return res
|
|
|
|
def _has_auto_menu_dep_on(self, on):
|
|
"""See Choice._determine_actual_symbols()."""
|
|
if not isinstance(self.parent, Choice):
|
|
_internal_error("Attempt to determine auto menu dependency for "
|
|
"symbol ouside of choice.")
|
|
|
|
if not self.prompts:
|
|
# If we have no prompt, use the menu dependencies instead (what was
|
|
# specified with 'depends on')
|
|
return self.menu_dep is not None and \
|
|
self.config._expr_depends_on(self.menu_dep, on)
|
|
|
|
for _, cond_expr in self.prompts:
|
|
if self.config._expr_depends_on(cond_expr, on):
|
|
return True
|
|
|
|
return False
|
|
|
|
class Menu(Item):
|
|
|
|
"""Represents a menu statement."""
|
|
|
|
#
|
|
# Public interface
|
|
#
|
|
|
|
def get_config(self):
|
|
"""Return the Config instance this menu is from."""
|
|
return self.config
|
|
|
|
def get_title(self):
|
|
"""Returns the title text of the menu."""
|
|
return self.title
|
|
|
|
def get_parent(self):
|
|
"""Returns the menu or choice statement that contains the menu, or
|
|
None if the menu is at the top level. Note that if statements are
|
|
treated as syntactic sugar and do not have an explicit class
|
|
representation."""
|
|
return self.parent
|
|
|
|
def get_location(self):
|
|
"""Returns the location of the menu as a (filename, linenr) tuple,
|
|
where filename is a string and linenr an int."""
|
|
return (self.filename, self.linenr)
|
|
|
|
def get_items(self, recursive=False):
|
|
"""Returns a list containing the items (symbols, menus, choice
|
|
statements and comments) in in the menu, in the same order that the
|
|
items appear within the menu.
|
|
|
|
recursive (default: False): True if items contained in items within the
|
|
menu should be included recursively (preorder)."""
|
|
|
|
if not recursive:
|
|
return self.block
|
|
|
|
res = []
|
|
for item in self.block:
|
|
res.append(item)
|
|
if isinstance(item, Menu):
|
|
res.extend(item.get_items(True))
|
|
elif isinstance(item, Choice):
|
|
res.extend(item.get_items())
|
|
return res
|
|
|
|
def get_symbols(self, recursive=False):
|
|
"""Returns a list containing the symbols in the menu, in the same order
|
|
that they appear within the menu.
|
|
|
|
recursive (default: False): True if symbols contained in items within
|
|
the menu should be included recursively."""
|
|
|
|
return [item for item in self.get_items(recursive) if
|
|
isinstance(item, Symbol)]
|
|
|
|
def get_visibility(self):
|
|
"""Returns the visibility of the menu. This also affects the visibility
|
|
of subitems. See also Symbol.get_visibility()."""
|
|
return self.config._eval_expr(self.dep_expr)
|
|
|
|
def get_visible_if_visibility(self):
|
|
"""Returns the visibility the menu gets from its 'visible if'
|
|
condition. "y" if the menu has no 'visible if' condition."""
|
|
return self.config._eval_expr(self.visible_if_expr)
|
|
|
|
def get_referenced_symbols(self, refs_from_enclosing=False):
|
|
"""See Symbol.get_referenced_symbols()."""
|
|
return self.all_referenced_syms if refs_from_enclosing else \
|
|
self.referenced_syms
|
|
|
|
def __str__(self):
|
|
"""Returns a string containing various information about the menu."""
|
|
depends_on_str = self.config._expr_val_str(self.orig_deps,
|
|
"(no dependencies)")
|
|
visible_if_str = self.config._expr_val_str(self.visible_if_expr,
|
|
"(no dependencies)")
|
|
|
|
additional_deps_str = " " + \
|
|
self.config._expr_val_str(self.deps_from_containing,
|
|
"(no additional dependencies)")
|
|
|
|
return _lines("Menu",
|
|
"Title : " + self.title,
|
|
"'depends on' dependencies : " + depends_on_str,
|
|
"'visible if' dependencies : " + visible_if_str,
|
|
"Additional dependencies from enclosing menus and "
|
|
"ifs:",
|
|
additional_deps_str,
|
|
"Location: {0}:{1}".format(self.filename, self.linenr))
|
|
|
|
#
|
|
# Private methods
|
|
#
|
|
|
|
def __init__(self):
|
|
"""Menu constructor -- not intended to be called directly by
|
|
Kconfiglib clients."""
|
|
|
|
self.title = None
|
|
self.dep_expr = None
|
|
self.visible_if_expr = None
|
|
self.block = [] # List of contained items
|
|
self.config = None
|
|
self.parent = None
|
|
|
|
# Dependency expression without dependencies from enclosing menus and
|
|
# ifs propagated
|
|
self.orig_deps = None
|
|
|
|
# Dependencies inherited from containing menus and ifs
|
|
self.deps_from_containing = None
|
|
# The set of symbols referenced by this menu (see
|
|
# get_referenced_symbols())
|
|
self.referenced_syms = set()
|
|
# Like 'referenced_syms', but includes symbols from
|
|
# dependencies inherited from enclosing menus and ifs
|
|
self.all_referenced_syms = None
|
|
|
|
self.filename = None
|
|
self.linenr = None
|
|
|
|
def _make_conf(self, append_fn):
|
|
if self.config._eval_expr(self.dep_expr) != "n" and \
|
|
self.config._eval_expr(self.visible_if_expr) != "n":
|
|
append_fn("\n#\n# {0}\n#".format(self.title))
|
|
_make_block_conf(self.block, append_fn)
|
|
|
|
class Choice(Item):
|
|
|
|
"""Represents a choice statement. A choice can be in one of three modes:
|
|
|
|
"n" - The choice is not visible and no symbols can be selected.
|
|
|
|
"m" - Any number of symbols can be set to "m". The rest will be "n". This
|
|
is safe since potentially conflicting options don't actually get
|
|
compiled into the kernel simultaneously with "m".
|
|
|
|
"y" - One symbol will be "y" while the rest are "n".
|
|
|
|
Only tristate choices can be in "m" mode, and the visibility of the choice
|
|
is an upper bound on the mode, so that e.g. a choice that depends on a
|
|
symbol with value "m" will be in "m" mode.
|
|
|
|
The mode changes automatically when a value is assigned to a symbol within
|
|
the choice.
|
|
|
|
See Symbol.get_visibility() too."""
|
|
|
|
#
|
|
# Public interface
|
|
#
|
|
|
|
def get_config(self):
|
|
"""Returns the Config instance this choice is from."""
|
|
return self.config
|
|
|
|
def get_name(self):
|
|
"""For named choices, returns the name. Returns None for unnamed
|
|
choices. No named choices appear anywhere in the kernel Kconfig files
|
|
as of Linux 3.7.0-rc8."""
|
|
return self.name
|
|
|
|
def get_type(self):
|
|
"""Returns the type of the choice. See Symbol.get_type()."""
|
|
return self.type
|
|
|
|
def get_prompts(self):
|
|
"""Returns a list of prompts defined for the choice, in the order they
|
|
appear in the configuration files. Returns the empty list for choices
|
|
with no prompt.
|
|
|
|
This list will have a single entry for the vast majority of choices
|
|
having prompts, but having multiple prompts for a single choice is
|
|
possible through having multiple 'choice' entries for it (though I'm
|
|
not sure if that ever happens in practice)."""
|
|
return [prompt for prompt, _ in self.orig_prompts]
|
|
|
|
def get_help(self):
|
|
"""Returns the help text of the choice, or None if the choice has no
|
|
help text."""
|
|
return self.help
|
|
|
|
def get_parent(self):
|
|
"""Returns the menu or choice statement that contains the choice, or
|
|
None if the choice is at the top level. Note that if statements are
|
|
treated as syntactic sugar and do not have an explicit class
|
|
representation."""
|
|
return self.parent
|
|
|
|
def get_def_locations(self):
|
|
"""Returns a list of (filename, linenr) tuples, where filename (string)
|
|
and linenr (int) represent a location where the choice is defined. For
|
|
the vast majority of choices (all of them as of Linux 3.7.0-rc8) this
|
|
list will only contain one element, but its possible for named choices
|
|
to be defined in multiple locations."""
|
|
return self.def_locations
|
|
|
|
def get_selection(self):
|
|
"""Returns the symbol selected (either by the user or through
|
|
defaults), or None if either no symbol is selected or the mode is not
|
|
"y"."""
|
|
if self.cached_selection is not None:
|
|
if self.cached_selection == NO_SELECTION:
|
|
return None
|
|
return self.cached_selection
|
|
|
|
if self.get_mode() != "y":
|
|
return self._cache_ret(None)
|
|
|
|
# User choice available?
|
|
if self.user_val is not None and _get_visibility(self.user_val) == "y":
|
|
return self._cache_ret(self.user_val)
|
|
|
|
if self.optional:
|
|
return self._cache_ret(None)
|
|
|
|
return self._cache_ret(self.get_selection_from_defaults())
|
|
|
|
def get_selection_from_defaults(self):
|
|
"""Like Choice.get_selection(), but acts as if no symbol has been
|
|
selected by the user and no 'optional' flag is in effect."""
|
|
|
|
if not self.actual_symbols:
|
|
return None
|
|
|
|
for symbol, cond_expr in self.def_exprs:
|
|
if self.config._eval_expr(cond_expr) != "n":
|
|
chosen_symbol = symbol
|
|
break
|
|
else:
|
|
chosen_symbol = self.actual_symbols[0]
|
|
|
|
# Is the chosen symbol visible?
|
|
if _get_visibility(chosen_symbol) != "n":
|
|
return chosen_symbol
|
|
# Otherwise, pick the first visible symbol
|
|
for sym in self.actual_symbols:
|
|
if _get_visibility(sym) != "n":
|
|
return sym
|
|
return None
|
|
|
|
def get_user_selection(self):
|
|
"""If the choice is in "y" mode and has a user-selected symbol, returns
|
|
that symbol. Otherwise, returns None."""
|
|
return self.user_val
|
|
|
|
def get_items(self):
|
|
"""Gets all items contained in the choice in the same order as within
|
|
the configuration ("items" instead of "symbols" since choices and
|
|
comments might appear within choices. This only happens in one place as
|
|
of Linux 3.7.0-rc8, in drivers/usb/gadget/Kconfig)."""
|
|
return self.block
|
|
|
|
def get_symbols(self):
|
|
"""Returns a list containing the choice's symbols.
|
|
|
|
A quirk (perhaps a bug) of Kconfig is that you can put items within a
|
|
choice that will not be considered members of the choice insofar as
|
|
selection is concerned. This happens for example if one symbol within a
|
|
choice 'depends on' the symbol preceding it, or if you put non-symbol
|
|
items within choices.
|
|
|
|
As of Linux 3.7.0-rc8, this seems to be used intentionally in one
|
|
place: drivers/usb/gadget/Kconfig.
|
|
|
|
This function returns the "proper" symbols of the choice in the order
|
|
they appear in the choice, excluding such items. If you want all items
|
|
in the choice, use get_items()."""
|
|
return self.actual_symbols
|
|
|
|
def get_referenced_symbols(self, refs_from_enclosing=False):
|
|
"""See Symbol.get_referenced_symbols()."""
|
|
return self.all_referenced_syms if refs_from_enclosing else \
|
|
self.referenced_syms
|
|
|
|
def get_visibility(self):
|
|
"""Returns the visibility of the choice statement: one of "n", "m" or
|
|
"y". This acts as an upper limit on the mode of the choice (though bool
|
|
choices can only have the mode "y"). See the class documentation for an
|
|
explanation of modes."""
|
|
return _get_visibility(self)
|
|
|
|
def get_mode(self):
|
|
"""Returns the mode of the choice. See the class documentation for
|
|
an explanation of modes."""
|
|
minimum_mode = "n" if self.optional else "m"
|
|
mode = self.user_mode if self.user_mode is not None else minimum_mode
|
|
mode = self.config._eval_min(mode, _get_visibility(self))
|
|
|
|
# Promote "m" to "y" for boolean choices
|
|
if mode == "m" and self.type == BOOL:
|
|
return "y"
|
|
|
|
return mode
|
|
|
|
def is_optional(self):
|
|
"""Returns True if the choice has the 'optional' flag set (and so will
|
|
default to "n" mode)."""
|
|
return self.optional
|
|
|
|
def __str__(self):
|
|
"""Returns a string containing various information about the choice
|
|
statement."""
|
|
return self.config._get_sym_or_choice_str(self)
|
|
|
|
#
|
|
# Private methods
|
|
#
|
|
|
|
def __init__(self):
|
|
"""Choice constructor -- not intended to be called directly by
|
|
Kconfiglib clients."""
|
|
|
|
self.name = None # Yes, choices can be named
|
|
self.type = UNKNOWN
|
|
self.prompts = []
|
|
self.def_exprs = [] # 'default' properties
|
|
self.help = None # Help text
|
|
self.block = [] # List of contained items
|
|
self.config = None
|
|
self.parent = None
|
|
|
|
self.user_val = None
|
|
self.user_mode = None
|
|
|
|
# We need to filter out symbols that appear within the choice block but
|
|
# are not considered choice items (see
|
|
# Choice._determine_actual_symbols()) This list holds the "actual"
|
|
# choice items.
|
|
self.actual_symbols = []
|
|
|
|
# The prompts and default values without any dependencies from
|
|
# enclosing menus and ifs propagated
|
|
self.orig_prompts = []
|
|
self.orig_def_exprs = []
|
|
|
|
# Dependencies inherited from containing menus and ifs
|
|
self.deps_from_containing = None
|
|
# The set of symbols referenced by this choice (see
|
|
# get_referenced_symbols())
|
|
self.referenced_syms = set()
|
|
# Like 'referenced_syms', but includes symbols from
|
|
# dependencies inherited from enclosing menus and ifs
|
|
self.all_referenced_syms = set()
|
|
|
|
# See Choice.get_def_locations()
|
|
self.def_locations = []
|
|
|
|
# Cached values
|
|
self.cached_selection = None
|
|
self.cached_visibility = None
|
|
|
|
self.optional = False
|
|
|
|
def _determine_actual_symbols(self):
|
|
"""If a symbol's visibility depends on the preceding symbol within a
|
|
choice, it is no longer viewed as a choice item. (This is quite
|
|
possibly a bug, but some things consciously use it... ugh. It stems
|
|
from automatic submenu creation.) In addition, it's possible to have
|
|
choices and comments within choices, and those shouldn't be considered
|
|
choice items either. Only drivers/usb/gadget/Kconfig seems to depend on
|
|
any of this. This method computes the "actual" items in the choice and
|
|
sets the is_choice_sym flag on them (retrieved via is_choice_symbol()).
|
|
|
|
Don't let this scare you: an earlier version simply checked for a
|
|
sequence of symbols where all symbols after the first appeared in the
|
|
'depends on' expression of the first, and that worked fine. The added
|
|
complexity is to be future-proof in the event that
|
|
drivers/usb/gadget/Kconfig turns even more sinister. It might very well
|
|
be overkilling things (especially if that file is refactored ;)."""
|
|
|
|
# Items might depend on each other in a tree structure, so we need a
|
|
# stack to keep track of the current tentative parent
|
|
stack = []
|
|
|
|
for item in self.block:
|
|
if not isinstance(item, Symbol):
|
|
stack = []
|
|
continue
|
|
|
|
while stack:
|
|
if item._has_auto_menu_dep_on(stack[-1]):
|
|
# The item should not be viewed as a choice item, so don't
|
|
# set item.is_choice_sym
|
|
stack.append(item)
|
|
break
|
|
else:
|
|
stack.pop()
|
|
else:
|
|
item.is_choice_sym = True
|
|
self.actual_symbols.append(item)
|
|
stack.append(item)
|
|
|
|
def _cache_ret(self, selection):
|
|
# As None is used to indicate the lack of a cached value we can't use
|
|
# that to cache the fact that the choice has no selection. Instead, we
|
|
# use the symbolic constant NO_SELECTION.
|
|
if selection is None:
|
|
self.cached_selection = NO_SELECTION
|
|
else:
|
|
self.cached_selection = selection
|
|
|
|
return selection
|
|
|
|
def _invalidate(self):
|
|
self.cached_selection = None
|
|
self.cached_visibility = None
|
|
|
|
def _unset_user_value(self):
|
|
self._invalidate()
|
|
self.user_val = None
|
|
self.user_mode = None
|
|
|
|
def _make_conf(self, append_fn):
|
|
_make_block_conf(self.block, append_fn)
|
|
|
|
class Comment(Item):
|
|
|
|
"""Represents a comment statement."""
|
|
|
|
#
|
|
# Public interface
|
|
#
|
|
|
|
def get_config(self):
|
|
"""Returns the Config instance this comment is from."""
|
|
return self.config
|
|
|
|
def get_text(self):
|
|
"""Returns the text of the comment."""
|
|
return self.text
|
|
|
|
def get_parent(self):
|
|
"""Returns the menu or choice statement that contains the comment, or
|
|
None if the comment is at the top level. Note that if statements are
|
|
treated as syntactic sugar and do not have an explicit class
|
|
representation."""
|
|
return self.parent
|
|
|
|
def get_location(self):
|
|
"""Returns the location of the comment as a (filename, linenr) tuple,
|
|
where filename is a string and linenr an int."""
|
|
return (self.filename, self.linenr)
|
|
|
|
def get_visibility(self):
|
|
"""Returns the visibility of the comment. See also
|
|
Symbol.get_visibility()."""
|
|
return self.config._eval_expr(self.dep_expr)
|
|
|
|
def get_referenced_symbols(self, refs_from_enclosing=False):
|
|
"""See Symbol.get_referenced_symbols()."""
|
|
return self.all_referenced_syms if refs_from_enclosing else \
|
|
self.referenced_syms
|
|
|
|
def __str__(self):
|
|
"""Returns a string containing various information about the
|
|
comment."""
|
|
dep_str = self.config._expr_val_str(self.orig_deps,
|
|
"(no dependencies)")
|
|
|
|
additional_deps_str = " " + \
|
|
self.config._expr_val_str(self.deps_from_containing,
|
|
"(no additional dependencies)")
|
|
|
|
return _lines("Comment",
|
|
"Text: " + str(self.text),
|
|
"Dependencies: " + dep_str,
|
|
"Additional dependencies from enclosing menus and "
|
|
"ifs:",
|
|
additional_deps_str,
|
|
"Location: {0}:{1}".format(self.filename, self.linenr))
|
|
|
|
#
|
|
# Private methods
|
|
#
|
|
|
|
def __init__(self):
|
|
"""Comment constructor -- not intended to be called directly by
|
|
Kconfiglib clients."""
|
|
|
|
self.text = None
|
|
self.dep_expr = None
|
|
self.config = None
|
|
self.parent = None
|
|
|
|
# Dependency expression without dependencies from enclosing menus and
|
|
# ifs propagated
|
|
self.orig_deps = None
|
|
|
|
# Dependencies inherited from containing menus and ifs
|
|
self.deps_from_containing = None
|
|
# The set of symbols referenced by this comment (see
|
|
# get_referenced_symbols())
|
|
self.referenced_syms = set()
|
|
# Like 'referenced_syms', but includes symbols from
|
|
# dependencies inherited from enclosing menus and ifs
|
|
self.all_referenced_syms = None
|
|
|
|
self.filename = None
|
|
self.linenr = None
|
|
|
|
def _make_conf(self, append_fn):
|
|
if self.config._eval_expr(self.dep_expr) != "n":
|
|
append_fn("\n#\n# {0}\n#".format(self.text))
|
|
|
|
class Kconfig_Syntax_Error(Exception):
|
|
"""Exception raised for syntax errors."""
|
|
pass
|
|
|
|
class Internal_Error(Exception):
|
|
"""Exception raised for internal errors."""
|
|
pass
|
|
|
|
#
|
|
# Public functions
|
|
#
|
|
|
|
def tri_less(v1, v2):
|
|
"""Returns True if the tristate v1 is less than the tristate v2, where "n",
|
|
"m" and "y" are ordered from lowest to highest."""
|
|
return TRI_TO_INT[v1] < TRI_TO_INT[v2]
|
|
|
|
def tri_less_eq(v1, v2):
|
|
"""Returns True if the tristate v1 is less than or equal to the tristate
|
|
v2, where "n", "m" and "y" are ordered from lowest to highest."""
|
|
return TRI_TO_INT[v1] <= TRI_TO_INT[v2]
|
|
|
|
def tri_greater(v1, v2):
|
|
"""Returns True if the tristate v1 is greater than the tristate v2, where
|
|
"n", "m" and "y" are ordered from lowest to highest."""
|
|
return TRI_TO_INT[v1] > TRI_TO_INT[v2]
|
|
|
|
def tri_greater_eq(v1, v2):
|
|
"""Returns True if the tristate v1 is greater than or equal to the tristate
|
|
v2, where "n", "m" and "y" are ordered from lowest to highest."""
|
|
return TRI_TO_INT[v1] >= TRI_TO_INT[v2]
|
|
|
|
#
|
|
# Internal classes
|
|
#
|
|
|
|
class _Feed(object):
|
|
|
|
"""Class for working with sequences in a stream-like fashion; handy for
|
|
tokens."""
|
|
|
|
# This would be more helpful on the item classes, but would remove some
|
|
# flexibility
|
|
__slots__ = ['items', 'length', 'i']
|
|
|
|
def __init__(self, items):
|
|
self.items = items
|
|
self.length = len(self.items)
|
|
self.i = 0
|
|
|
|
def get_next(self):
|
|
if self.i >= self.length:
|
|
return None
|
|
item = self.items[self.i]
|
|
self.i += 1
|
|
return item
|
|
|
|
def peek_next(self):
|
|
return None if self.i >= self.length else self.items[self.i]
|
|
|
|
def check(self, token):
|
|
"""Check if the next token is 'token'. If so, remove it from the token
|
|
feed and return True. Otherwise, leave it in and return False."""
|
|
if self.i < self.length and self.items[self.i] == token:
|
|
self.i += 1
|
|
return True
|
|
return False
|
|
|
|
def unget_all(self):
|
|
self.i = 0
|
|
|
|
class _FileFeed(object):
|
|
|
|
"""Feeds lines from a file. Keeps track of the filename and current line
|
|
number. Joins any line ending in \\ with the following line. We need to be
|
|
careful to get the line number right in the presence of continuation
|
|
lines."""
|
|
|
|
__slots__ = ['filename', 'lines', 'length', 'linenr']
|
|
|
|
def __init__(self, filename):
|
|
self.filename = _clean_up_path(filename)
|
|
with open(filename, "r") as f:
|
|
# No interleaving of I/O and processing yet. Don't know if it would
|
|
# help.
|
|
self.lines = f.readlines()
|
|
self.length = len(self.lines)
|
|
self.linenr = 0
|
|
|
|
def get_next(self):
|
|
if self.linenr >= self.length:
|
|
return None
|
|
line = self.lines[self.linenr]
|
|
self.linenr += 1
|
|
while line.endswith("\\\n"):
|
|
line = line[:-2] + self.lines[self.linenr]
|
|
self.linenr += 1
|
|
return line
|
|
|
|
def peek_next(self):
|
|
linenr = self.linenr
|
|
if linenr >= self.length:
|
|
return None
|
|
line = self.lines[linenr]
|
|
while line.endswith("\\\n"):
|
|
linenr += 1
|
|
line = line[:-2] + self.lines[linenr]
|
|
return line
|
|
|
|
def unget(self):
|
|
self.linenr -= 1
|
|
while self.lines[self.linenr].endswith("\\\n"):
|
|
self.linenr -= 1
|
|
|
|
def next_nonblank(self):
|
|
"""Removes lines up to and including the next non-blank (not all-space)
|
|
line and returns it. Returns None if there are no more non-blank
|
|
lines."""
|
|
while 1:
|
|
line = self.get_next()
|
|
if line is None or not line.isspace():
|
|
return line
|
|
|
|
#
|
|
# Internal functions
|
|
#
|
|
|
|
def _get_visibility(sc):
|
|
"""Symbols and Choices have a "visibility" that acts as an upper bound on
|
|
the values a user can set for them, corresponding to the visibility in e.g.
|
|
'make menuconfig'. This function calculates the visibility for the Symbol
|
|
or Choice 'sc' -- the logic is nearly identical."""
|
|
if sc.cached_visibility is None:
|
|
vis = "n"
|
|
for _, cond_expr in sc.prompts:
|
|
vis = sc.config._eval_max(vis, cond_expr)
|
|
|
|
if isinstance(sc, Symbol) and sc.is_choice_sym:
|
|
if sc.type == TRISTATE and vis == "m" and \
|
|
sc.parent.get_mode() == "y":
|
|
# Choice symbols with visibility "m" are not visible if the
|
|
# choice has mode "y"
|
|
vis = "n"
|
|
else:
|
|
vis = sc.config._eval_min(vis, _get_visibility(sc.parent))
|
|
|
|
# Promote "m" to "y" if we're dealing with a non-tristate
|
|
if vis == "m" and sc.type != TRISTATE:
|
|
vis = "y"
|
|
|
|
sc.cached_visibility = vis
|
|
|
|
return sc.cached_visibility
|
|
|
|
def _make_and(e1, e2):
|
|
"""Constructs an AND (&&) expression. Performs trivial simplification.
|
|
Nones equate to 'y'.
|
|
|
|
Note: returns None if e1 == e2 == None."""
|
|
if e1 is None or e1 == "y":
|
|
return e2
|
|
if e2 is None or e2 == "y":
|
|
return e1
|
|
|
|
# Prefer to merge argument lists if possible to reduce the number of nodes
|
|
|
|
if isinstance(e1, tuple) and e1[0] == AND:
|
|
if isinstance(e2, tuple) and e2[0] == AND:
|
|
return (AND, e1[1] + e2[1])
|
|
return (AND, e1[1] + [e2])
|
|
|
|
if isinstance(e2, tuple) and e2[0] == AND:
|
|
return (AND, e2[1] + [e1])
|
|
|
|
return (AND, [e1, e2])
|
|
|
|
def _make_or(e1, e2):
|
|
"""Constructs an OR (||) expression. Performs trivial simplification and
|
|
avoids Nones. Nones equate to 'y', which is usually what we want, but needs
|
|
to be kept in mind."""
|
|
|
|
# Perform trivial simplification and avoid None's (which
|
|
# correspond to y's)
|
|
if e1 is None or e2 is None or e1 == "y" or e2 == "y":
|
|
return "y"
|
|
if e1 == "n":
|
|
return e2
|
|
|
|
# Prefer to merge argument lists if possible to reduce the number of nodes
|
|
|
|
if isinstance(e1, tuple) and e1[0] == OR:
|
|
if isinstance(e2, tuple) and e2[0] == OR:
|
|
return (OR, e1[1] + e2[1])
|
|
return (OR, e1[1] + [e2])
|
|
|
|
if isinstance(e2, tuple) and e2[0] == OR:
|
|
return (OR, e2[1] + [e1])
|
|
|
|
return (OR, [e1, e2])
|
|
|
|
def _get_expr_syms_rec(expr, res):
|
|
"""_get_expr_syms() helper. Recurses through expressions."""
|
|
if isinstance(expr, Symbol):
|
|
res.add(expr)
|
|
elif isinstance(expr, str):
|
|
return
|
|
elif expr[0] == AND or expr[0] == OR:
|
|
for term in expr[1]:
|
|
_get_expr_syms_rec(term, res)
|
|
elif expr[0] == NOT:
|
|
_get_expr_syms_rec(expr[1], res)
|
|
elif expr[0] == EQUAL or expr[0] == UNEQUAL:
|
|
if isinstance(expr[1], Symbol):
|
|
res.add(expr[1])
|
|
if isinstance(expr[2], Symbol):
|
|
res.add(expr[2])
|
|
else:
|
|
_internal_error("Internal error while fetching symbols from an "
|
|
"expression with token stream {0}.".format(expr))
|
|
|
|
def _get_expr_syms(expr):
|
|
"""Returns the set() of symbols appearing in expr."""
|
|
res = set()
|
|
if expr is not None:
|
|
_get_expr_syms_rec(expr, res)
|
|
return res
|
|
|
|
def _str_val(obj):
|
|
"""Returns the value of obj as a string. If obj is not a string (constant
|
|
symbol), it must be a Symbol."""
|
|
return obj if isinstance(obj, str) else obj.get_value()
|
|
|
|
def _make_block_conf(block, append_fn):
|
|
"""Returns a list of .config strings for a block (list) of items."""
|
|
|
|
# Collect the substrings in a list and later use join() instead of += to
|
|
# build the final .config contents. With older Python versions, this yields
|
|
# linear instead of quadratic complexity.
|
|
for item in block:
|
|
item._make_conf(append_fn)
|
|
|
|
def _sym_str_string(sym_or_str):
|
|
if isinstance(sym_or_str, str):
|
|
return '"' + sym_or_str + '"'
|
|
return sym_or_str.name
|
|
|
|
def _intersperse(lst, op):
|
|
"""_expr_to_str() helper. Gets the string representation of each expression
|
|
in lst and produces a list where op has been inserted between the
|
|
elements."""
|
|
if not lst:
|
|
return ""
|
|
|
|
res = []
|
|
|
|
def handle_sub_expr(expr):
|
|
no_parens = isinstance(expr, (str, Symbol)) or \
|
|
expr[0] in (EQUAL, UNEQUAL) or \
|
|
PRECEDENCE[op] <= PRECEDENCE[expr[0]]
|
|
if not no_parens:
|
|
res.append("(")
|
|
res.extend(_expr_to_str_rec(expr))
|
|
if not no_parens:
|
|
res.append(")")
|
|
|
|
op_str = OP_TO_STR[op]
|
|
|
|
handle_sub_expr(lst[0])
|
|
for expr in lst[1:]:
|
|
res.append(op_str)
|
|
handle_sub_expr(expr)
|
|
|
|
return res
|
|
|
|
def _expr_to_str_rec(expr):
|
|
if expr is None:
|
|
return [""]
|
|
|
|
if isinstance(expr, (Symbol, str)):
|
|
return [_sym_str_string(expr)]
|
|
|
|
if expr[0] in (AND, OR):
|
|
return _intersperse(expr[1], expr[0])
|
|
|
|
if expr[0] == NOT:
|
|
need_parens = not isinstance(expr[1], (str, Symbol))
|
|
|
|
res = ["!"]
|
|
if need_parens:
|
|
res.append("(")
|
|
res.extend(_expr_to_str_rec(expr[1]))
|
|
if need_parens:
|
|
res.append(")")
|
|
return res
|
|
|
|
if expr[0] in (EQUAL, UNEQUAL):
|
|
return [_sym_str_string(expr[1]),
|
|
OP_TO_STR[expr[0]],
|
|
_sym_str_string(expr[2])]
|
|
|
|
def _expr_to_str(expr):
|
|
return "".join(_expr_to_str_rec(expr))
|
|
|
|
def _indentation(line):
|
|
"""Returns the length of the line's leading whitespace, treating tab stops
|
|
as being spaced 8 characters apart."""
|
|
line = line.expandtabs()
|
|
return len(line) - len(line.lstrip())
|
|
|
|
def _deindent(line, indent):
|
|
"""Deindent 'line' by 'indent' spaces."""
|
|
line = line.expandtabs()
|
|
if len(line) <= indent:
|
|
return line
|
|
return line[indent:]
|
|
|
|
def _is_base_n(s, n):
|
|
try:
|
|
int(s, n)
|
|
return True
|
|
except ValueError:
|
|
return False
|
|
|
|
def _lines(*args):
|
|
"""Returns a string consisting of all arguments, with newlines inserted
|
|
between them."""
|
|
return "\n".join(args)
|
|
|
|
def _comment(s):
|
|
"""Returns a new string with "#" inserted before each line in 's'."""
|
|
if not s:
|
|
return "#"
|
|
res = "".join(["#" + line for line in s.splitlines(True)])
|
|
if s.endswith("\n"):
|
|
return res + "#"
|
|
return res
|
|
|
|
def _clean_up_path(path):
|
|
"""Strips an initial "./" and any trailing slashes from 'path'."""
|
|
if path.startswith("./"):
|
|
path = path[2:]
|
|
return path.rstrip("/")
|
|
|
|
def _build_msg(msg, filename, linenr):
|
|
if filename is not None:
|
|
msg = "{0}:{1}: ".format(_clean_up_path(filename), linenr) + msg
|
|
return msg
|
|
|
|
def _stderr_msg(msg, filename, linenr):
|
|
sys.stderr.write(_build_msg(msg, filename, linenr) + "\n")
|
|
|
|
def _tokenization_error(s, filename, linenr):
|
|
loc = "" if filename is None else "{0}:{1}: ".format(filename, linenr)
|
|
raise Kconfig_Syntax_Error("{0}Couldn't tokenize '{1}'"
|
|
.format(loc, s.strip()))
|
|
|
|
def _parse_error(s, msg, filename, linenr):
|
|
loc = "" if filename is None else "{0}:{1}: ".format(filename, linenr)
|
|
raise Kconfig_Syntax_Error("{0}Couldn't parse '{1}'{2}"
|
|
.format(loc, s.strip(),
|
|
"." if msg is None else ": " + msg))
|
|
|
|
def _internal_error(msg):
|
|
raise Internal_Error(msg +
|
|
"\nSorry! You may want to send an email to ulfalizer a.t Google's "
|
|
"email service to tell me about this. Include the message above and the "
|
|
"stack trace and describe what you were doing.")
|
|
|
|
#
|
|
# Internal global constants
|
|
#
|
|
|
|
# Tokens
|
|
(T_AND, T_OR, T_NOT,
|
|
T_OPEN_PAREN, T_CLOSE_PAREN,
|
|
T_EQUAL, T_UNEQUAL,
|
|
T_MAINMENU, T_MENU, T_ENDMENU,
|
|
T_SOURCE, T_CHOICE, T_ENDCHOICE,
|
|
T_COMMENT, T_CONFIG, T_MENUCONFIG,
|
|
T_HELP, T_IF, T_ENDIF, T_DEPENDS, T_ON,
|
|
T_OPTIONAL, T_PROMPT, T_DEFAULT,
|
|
T_BOOL, T_TRISTATE, T_HEX, T_INT, T_STRING,
|
|
T_DEF_BOOL, T_DEF_TRISTATE,
|
|
T_SELECT, T_IMPLY, T_RANGE, T_OPTION, T_ALLNOCONFIG_Y, T_ENV,
|
|
T_DEFCONFIG_LIST, T_MODULES, T_VISIBLE) = range(40)
|
|
|
|
# The leading underscore before the function assignments below prevent pydoc
|
|
# from listing them. The constants could be hidden too, but they're fairly
|
|
# obviously internal anyway, so don't bother spamming the code.
|
|
|
|
# Keyword to token map. Note that the get() method is assigned directly as a
|
|
# small optimization.
|
|
_get_keyword = \
|
|
{"mainmenu": T_MAINMENU, "menu": T_MENU, "endmenu": T_ENDMENU,
|
|
"endif": T_ENDIF, "endchoice": T_ENDCHOICE, "source": T_SOURCE,
|
|
"choice": T_CHOICE, "config": T_CONFIG, "comment": T_COMMENT,
|
|
"menuconfig": T_MENUCONFIG, "help": T_HELP, "if": T_IF,
|
|
"depends": T_DEPENDS, "on": T_ON, "optional": T_OPTIONAL,
|
|
"prompt": T_PROMPT, "default": T_DEFAULT, "bool": T_BOOL, "boolean": T_BOOL,
|
|
"tristate": T_TRISTATE, "int": T_INT, "hex": T_HEX, "def_bool": T_DEF_BOOL,
|
|
"def_tristate": T_DEF_TRISTATE, "string": T_STRING, "select": T_SELECT,
|
|
"imply" : T_IMPLY, "range": T_RANGE, "option": T_OPTION,
|
|
"allnoconfig_y": T_ALLNOCONFIG_Y, "env": T_ENV,
|
|
"defconfig_list": T_DEFCONFIG_LIST, "modules": T_MODULES,
|
|
"visible": T_VISIBLE}.get
|
|
|
|
# Strings to use for True and False
|
|
BOOL_STR = {False: "false", True: "true"}
|
|
|
|
# Tokens after which identifier-like lexemes are treated as strings. T_CHOICE
|
|
# is included to avoid symbols being registered for named choices.
|
|
STRING_LEX = frozenset((T_BOOL, T_TRISTATE, T_INT, T_HEX, T_STRING, T_CHOICE,
|
|
T_PROMPT, T_MENU, T_COMMENT, T_SOURCE, T_MAINMENU))
|
|
|
|
# Matches the initial token on a line; see _tokenize(). Also eats trailing
|
|
# whitespace as an optimization.
|
|
_initial_token_re_match = re.compile(r"[^\w]*(\w+)\s*").match
|
|
|
|
# Matches an identifier/keyword optionally preceded by whitespace. Also eats
|
|
# trailing whitespace as an optimization.
|
|
_id_keyword_re_match = re.compile(r"\s*([\w./-]+)\s*").match
|
|
|
|
# Regular expression for finding $-references to symbols in strings
|
|
_sym_ref_re_search = re.compile(r"\$[A-Za-z0-9_]+").search
|
|
|
|
# Integers representing symbol types
|
|
UNKNOWN, BOOL, TRISTATE, STRING, HEX, INT = range(6)
|
|
|
|
# Strings to use for types
|
|
TYPENAME = {UNKNOWN: "unknown", BOOL: "bool", TRISTATE: "tristate",
|
|
STRING: "string", HEX: "hex", INT: "int"}
|
|
|
|
# Token to type mapping
|
|
TOKEN_TO_TYPE = {T_BOOL: BOOL, T_TRISTATE: TRISTATE, T_STRING: STRING,
|
|
T_INT: INT, T_HEX: HEX}
|
|
|
|
# Default values for symbols of different types (the value the symbol gets if
|
|
# it is not assigned a user value and none of its 'default' clauses kick in)
|
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DEFAULT_VALUE = {BOOL: "n", TRISTATE: "n", STRING: "", INT: "", HEX: ""}
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# Indicates that no item is selected in a choice statement
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NO_SELECTION = 0
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# Integers representing expression types
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AND, OR, NOT, EQUAL, UNEQUAL = range(5)
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# Map from tristate values to integers
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TRI_TO_INT = {"n": 0, "m": 1, "y": 2}
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# Printing-related stuff
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OP_TO_STR = {AND: " && ", OR: " || ", EQUAL: " = ", UNEQUAL: " != "}
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PRECEDENCE = {OR: 0, AND: 1, NOT: 2}
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