lib/oe/patch: auto-commit when falling back from git am
When PATCHTOOL = "git", if we're not able to use "git am" to apply a patch and fall back to "git apply" or "patch", it is desirable to actually commit the changes, attempting to preserve (and interpret) the patch header as part of the commit message if present. As a bonus, the code for extracting the commit message is callable externally in case it is useful elsewhere. (From OE-Core rev: 8c522846093809a8deb866079e73fa317266c80e) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -202,6 +202,78 @@ class GitApplyTree(PatchTree):
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def __init__(self, dir, d):
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PatchTree.__init__(self, dir, d)
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@staticmethod
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def extractPatchHeader(patchfile):
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"""
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Extract just the header lines from the top of a patch file
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"""
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lines = []
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with open(patchfile, 'r') as f:
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for line in f.readlines():
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if line.startswith('Index: ') or line.startswith('diff -') or line.startswith('---'):
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break
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lines.append(line)
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return lines
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@staticmethod
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def prepareCommit(patchfile):
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"""
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Prepare a git commit command line based on the header from a patch file
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(typically this is useful for patches that cannot be applied with "git am" due to formatting)
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"""
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import tempfile
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import re
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author_re = re.compile('[\S ]+ <\S+@\S+\.\S+>')
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# Process patch header and extract useful information
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lines = GitApplyTree.extractPatchHeader(patchfile)
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outlines = []
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author = None
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date = None
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for line in lines:
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if line.startswith('Subject: '):
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subject = line.split(':', 1)[1]
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# Remove any [PATCH][oe-core] etc.
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subject = re.sub(r'\[.+?\]\s*', '', subject)
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outlines.insert(0, '%s\n\n' % subject.strip())
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continue
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if line.startswith('From: ') or line.startswith('Author: '):
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authorval = line.split(':', 1)[1].strip().replace('"', '')
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# git is fussy about author formatting i.e. it must be Name <email@domain>
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if author_re.match(authorval):
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author = authorval
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continue
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if line.startswith('Date: '):
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if date is None:
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dateval = line.split(':', 1)[1].strip()
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# Very crude check for date format, since git will blow up if it's not in the right
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# format. Without e.g. a python-dateutils dependency we can't do a whole lot more
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if len(dateval) > 12:
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date = dateval
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continue
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if line.startswith('Signed-off-by: '):
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authorval = line.split(':', 1)[1].strip().replace('"', '')
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# git is fussy about author formatting i.e. it must be Name <email@domain>
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if author_re.match(authorval):
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author = authorval
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outlines.append(line)
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# Add a pointer to the original patch file name
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if outlines and outlines[-1].strip():
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outlines.append('\n')
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outlines.append('(from original patch: %s)\n' % os.path.basename(patchfile))
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# Write out commit message to a file
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with tempfile.NamedTemporaryFile('w', delete=False) as tf:
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tmpfile = tf.name
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for line in outlines:
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tf.write(line)
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# Prepare git command
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cmd = ["git", "commit", "-F", tmpfile]
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# git doesn't like plain email addresses as authors
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if author and '<' in author:
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cmd.append('--author="%s"' % author)
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if date:
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cmd.append('--date="%s"' % date)
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return (tmpfile, cmd)
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def _applypatch(self, patch, force = False, reverse = False, run = True):
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def _applypatchhelper(shellcmd, patch, force = False, reverse = False, run = True):
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if reverse:
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@ -218,11 +290,25 @@ class GitApplyTree(PatchTree):
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shellcmd = ["git", "--work-tree=.", "am", "-3", "-p%s" % patch['strippath']]
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return _applypatchhelper(shellcmd, patch, force, reverse, run)
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except CmdError:
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# Fall back to git apply
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shellcmd = ["git", "--git-dir=.", "apply", "-p%s" % patch['strippath']]
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try:
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output = _applypatchhelper(shellcmd, patch, force, reverse, run)
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except CmdError:
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# Fall back to patch
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output = PatchTree._applypatch(self, patch, force, reverse, run)
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# Add all files
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shellcmd = ["git", "add", "-f", "."]
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output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
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# Exclude the patches directory
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shellcmd = ["git", "reset", "HEAD", self.patchdir]
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output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
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# Commit the result
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(tmpfile, shellcmd) = self.prepareCommit(patch['file'])
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try:
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output += runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
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finally:
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os.remove(tmpfile)
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return output
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