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8beb11ea6e
When support for sections (and thus hierarchical images) was added to
binman, the decision was made to create a new Section class which could
be used by both Image and an Entry_section class. The decision between
using inheritance and composition was tricky to make, but in the end it
was decided that Image was different enough from Entry that it made sense
to put the implementation of sections in an entirely separate class. It
also has the advantage that core Image code does have to rely on an entry
class in the etype directory.
This work was mostly completed in commit:
8f1da50ccc "binman: Refactor much of the image code into 'section'
As a result of this, the Section class has its own version of things like
offset and size and these must be kept in sync with the parent
Entry_section class in some cases.
In the last year it has become apparent that the cost of keeping things in
sync is larger than expected, since more and more code wants to access
these properties.
An alternative approach, previously considered and rejected, now seems
better.
Adjust Image to be a subclass of Entry_section. Move the code from Section
(in bsection.py) to Entry_section and delete Section. Update all tests
accordingly.
This requires substantial changes to Image. Overall the changes reduce
code size by about 240 lines. While much of that is just boilerplate from
Section, there are quite a few functions in Entry_section which now do not
need to be overiden from Entry. This suggests the change is beneficial
even without further functionality being added.
A side benefit is that the properties of sections are now consistent with
other entries. This fixes a problem in testListCmd() where some properties
are missing for sections.
Unfortunately this is a very large commit since it is not feasible to do
the migration piecemeal. Given the substantial tests available and the
100% code coverage of binman, we should be able to do this safely.
Signed-off-by: Simon Glass <sjg@chromium.org>
57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2018 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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# Entry-type module for a set of files which are placed in individual
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# sub-entries
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#
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import glob
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import os
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from section import Entry_section
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import fdt_util
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import state
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import tools
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class Entry_files(Entry_section):
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"""Entry containing a set of files
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Properties / Entry arguments:
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- pattern: Filename pattern to match the files to include
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- compress: Compression algorithm to use:
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none: No compression
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lz4: Use lz4 compression (via 'lz4' command-line utility)
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This entry reads a number of files and places each in a separate sub-entry
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within this entry. To access these you need to enable device-tree updates
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at run-time so you can obtain the file positions.
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"""
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def __init__(self, section, etype, node):
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Entry_section.__init__(self, section, etype, node)
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self._pattern = fdt_util.GetString(self._node, 'pattern')
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if not self._pattern:
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self.Raise("Missing 'pattern' property")
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self._compress = fdt_util.GetString(self._node, 'compress', 'none')
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self._require_matches = fdt_util.GetBool(self._node,
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'require-matches')
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def ExpandEntries(self):
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files = tools.GetInputFilenameGlob(self._pattern)
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if self._require_matches and not files:
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self.Raise("Pattern '%s' matched no files" % self._pattern)
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for fname in files:
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if not os.path.isfile(fname):
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continue
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name = os.path.basename(fname)
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subnode = self._node.FindNode(name)
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if not subnode:
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subnode = state.AddSubnode(self._node, name)
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state.AddString(subnode, 'type', 'blob')
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state.AddString(subnode, 'filename', fname)
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state.AddString(subnode, 'compress', self._compress)
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# Read entries again, now that we have some
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self._ReadEntries()
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