patman: Add --no-signoff to suppress adding signoffs

To enable use of patman with FSF/GNU projects, such as GCC or
Binutils, no Signed-off-by may be added.  This adds a command
line flag '--no-signoff' to suppress adding signoffs in patman
when processing commits.

Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Reviewed-by: Simon Glass <sjg@chromium.org>
Fix patman testBranch() test:
Signed-off-by: Simon Glass <sjg@chromium.org>

tools/patman/control.py

@@ -20,7 +20,7 @@ def setup():
     """Do required setup before doing anything"""
     gitutil.Setup()
 
-def prepare_patches(col, branch, count, start, end, ignore_binary):
+def prepare_patches(col, branch, count, start, end, ignore_binary, signoff):
     """Figure out what patches to generate, then generate them
 
     The patch files are written to the current directory, e.g. 0001_xxx.patch
@@ -56,7 +56,7 @@ def prepare_patches(col, branch, count, start, end, ignore_binary):
     to_do = count - end
     series = patchstream.get_metadata(branch, start, to_do)
     cover_fname, patch_files = gitutil.CreatePatches(
-        branch, start, to_do, ignore_binary, series)
+        branch, start, to_do, ignore_binary, series, signoff)
 
     # Fix up the patch files to our liking, and insert the cover letter
     patchstream.fix_patches(series, patch_files)
@@ -163,7 +163,7 @@ def send(args):
     col = terminal.Color()
     series, cover_fname, patch_files = prepare_patches(
         col, args.branch, args.count, args.start, args.end,
-        args.ignore_binary)
+        args.ignore_binary, args.add_signoff)
     ok = check_patches(series, patch_files, args.check_patch,
                        args.verbose)
 

tools/patman/func_test.py

@@ -475,7 +475,7 @@ complicated as possible''')
             with capture_sys_output() as _:
                 _, cover_fname, patch_files = control.prepare_patches(
                     col, branch=None, count=-1, start=0, end=0,
-                    ignore_binary=False)
+                    ignore_binary=False, signoff=True)
             self.assertIsNone(cover_fname)
             self.assertEqual(2, len(patch_files))
 
@@ -484,7 +484,7 @@ complicated as possible''')
             with capture_sys_output() as _:
                 _, cover_fname, patch_files = control.prepare_patches(
                     col, branch='second', count=-1, start=0, end=0,
-                    ignore_binary=False)
+                    ignore_binary=False, signoff=True)
             self.assertIsNotNone(cover_fname)
             self.assertEqual(3, len(patch_files))
 
@@ -492,7 +492,7 @@ complicated as possible''')
             with capture_sys_output() as _:
                 _, cover_fname, patch_files = control.prepare_patches(
                     col, branch='second', count=-1, start=0, end=1,
-                    ignore_binary=False)
+                    ignore_binary=False, signoff=True)
             self.assertIsNotNone(cover_fname)
             self.assertEqual(2, len(patch_files))
         finally:

tools/patman/gitutil.py

@@ -305,7 +305,7 @@ def PruneWorktrees(git_dir):
     if result.return_code != 0:
         raise OSError('git worktree prune: %s' % result.stderr)
 
-def CreatePatches(branch, start, count, ignore_binary, series):
+def CreatePatches(branch, start, count, ignore_binary, series, signoff = True):
     """Create a series of patches from the top of the current branch.
 
     The patch files are written to the current directory using
@@ -323,7 +323,9 @@ def CreatePatches(branch, start, count, ignore_binary, series):
     """
     if series.get('version'):
         version = '%s ' % series['version']
-    cmd = ['git', 'format-patch', '-M', '--signoff']
+    cmd = ['git', 'format-patch', '-M' ]
+    if signoff:
+        cmd.append('--signoff')
     if ignore_binary:
         cmd.append('--no-binary')
     if series.get('cover'):

tools/patman/main.py

@@ -81,6 +81,8 @@ send.add_argument('--no-check', action='store_false', dest='check_patch',
                   help="Don't check for patch compliance")
 send.add_argument('--no-tags', action='store_false', dest='process_tags',
                   default=True, help="Don't process subject tags as aliases")
+send.add_argument('--no-signoff', action='store_false', dest='add_signoff',
+                  default=True, help="Don't add Signed-off-by to patches")
 send.add_argument('--smtp-server', type=str,
                   help="Specify the SMTP server to 'git send-email'")