1 # Copyright (c) 2011 The Chromium OS Authors.
3 # SPDX-License-Identifier: GPL-2.0+
14 from series import Series
16 # Tags that we detect and remove
17 re_remove = re.compile('^BUG=|^TEST=|^BRANCH=|^Change-Id:|^Review URL:'
18 '|Reviewed-on:|Commit-\w*:')
20 # Lines which are allowed after a TEST= line
21 re_allowed_after_test = re.compile('^Signed-off-by:')
24 re_signoff = re.compile('^Signed-off-by: *(.*)')
26 # The start of the cover letter
27 re_cover = re.compile('^Cover-letter:')
30 re_cover_cc = re.compile('^Cover-letter-cc: *(.*)')
33 re_series_tag = re.compile('^Series-([a-z-]*): *(.*)')
36 re_commit_tag = re.compile('^Commit-([a-z-]*): *(.*)')
38 # Commit tags that we want to collect and keep
39 re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Patch-cc): (.*)')
41 # The start of a new commit in the git log
42 re_commit = re.compile('^commit ([0-9a-f]*)$')
44 # We detect these since checkpatch doesn't always do it
45 re_space_before_tab = re.compile('^[+].* \t')
47 # States we can be in - can we use range() and still have comments?
48 STATE_MSG_HEADER = 0 # Still in the message header
49 STATE_PATCH_SUBJECT = 1 # In patch subject (first line of log for a commit)
50 STATE_PATCH_HEADER = 2 # In patch header (after the subject)
51 STATE_DIFFS = 3 # In the diff part (past --- line)
54 """Class for detecting/injecting tags in a patch or series of patches
56 We support processing the output of 'git log' to read out the tags we
57 are interested in. We can also process a patch file in order to remove
58 unwanted tags or inject additional ones. These correspond to the two
61 def __init__(self, series, name=None, is_log=False):
62 self.skip_blank = False # True to skip a single blank line
63 self.found_test = False # Found a TEST= line
64 self.lines_after_test = 0 # MNumber of lines found after TEST=
65 self.warn = [] # List of warnings we have collected
66 self.linenum = 1 # Output line number we are up to
67 self.in_section = None # Name of start...END section we are in
68 self.notes = [] # Series notes
69 self.section = [] # The current section...END section
70 self.series = series # Info about the patch series
71 self.is_log = is_log # True if indent like git log
72 self.in_change = 0 # Non-zero if we are in a change list
73 self.blank_count = 0 # Number of blank lines stored up
74 self.state = STATE_MSG_HEADER # What state are we in?
75 self.tags = [] # Tags collected, like Tested-by...
76 self.signoff = [] # Contents of signoff line
77 self.commit = None # Current commit
79 def AddToSeries(self, line, name, value):
80 """Add a new Series-xxx tag.
82 When a Series-xxx tag is detected, we come here to record it, if we
83 are scanning a 'git log'.
86 line: Source line containing tag (useful for debug/error messages)
87 name: Tag name (part after 'Series-')
88 value: Tag value (part after 'Series-xxx: ')
91 self.in_section = name
92 self.skip_blank = False
94 self.series.AddTag(self.commit, line, name, value)
96 def AddToCommit(self, line, name, value):
97 """Add a new Commit-xxx tag.
99 When a Commit-xxx tag is detected, we come here to record it.
102 line: Source line containing tag (useful for debug/error messages)
103 name: Tag name (part after 'Commit-')
104 value: Tag value (part after 'Commit-xxx: ')
107 self.in_section = 'commit-' + name
108 self.skip_blank = False
110 def CloseCommit(self):
111 """Save the current commit into our commit list, and reset our state"""
112 if self.commit and self.is_log:
113 self.series.AddCommit(self.commit)
116 def FormatTags(self, tags):
118 for tag in sorted(tags):
119 if tag.startswith('Cc:'):
120 tag_list = tag[4:].split(',')
121 out_list += gitutil.BuildEmailList(tag_list, 'Cc:')
126 def ProcessLine(self, line):
127 """Process a single line of a patch file or commit log
129 This process a line and returns a list of lines to output. The list
130 may be empty or may contain multiple output lines.
132 This is where all the complicated logic is located. The class's
133 state is used to move between different states and detect things
136 We can be in one of two modes:
137 self.is_log == True: This is 'git log' mode, where most output is
138 indented by 4 characters and we are scanning for tags
140 self.is_log == False: This is 'patch' mode, where we already have
141 all the tags, and are processing patches to remove junk we
142 don't want, and add things we think are required.
145 line: text line to process
148 list of output lines, or [] if nothing should be output
150 # Initially we have no output. Prepare the input line string
152 line = line.rstrip('\n')
157 # Handle state transition and skipping blank lines
158 series_tag_match = re_series_tag.match(line)
159 commit_tag_match = re_commit_tag.match(line)
160 commit_match = re_commit.match(line) if self.is_log else None
161 cover_cc_match = re_cover_cc.match(line)
162 signoff_match = re_signoff.match(line)
164 if self.state == STATE_PATCH_HEADER:
165 tag_match = re_tag.match(line)
166 is_blank = not line.strip()
168 if (self.state == STATE_MSG_HEADER
169 or self.state == STATE_PATCH_SUBJECT):
172 # We don't have a subject in the text stream of patch files
173 # It has its own line with a Subject: tag
174 if not self.is_log and self.state == STATE_PATCH_SUBJECT:
177 self.state = STATE_MSG_HEADER
179 # If we are in a section, keep collecting lines until we see END
182 if self.in_section == 'cover':
183 self.series.cover = self.section
184 elif self.in_section == 'notes':
186 self.series.notes += self.section
187 elif self.in_section == 'commit-notes':
189 self.commit.notes += self.section
191 self.warn.append("Unknown section '%s'" % self.in_section)
192 self.in_section = None
193 self.skip_blank = True
196 self.section.append(line)
198 # Detect the commit subject
199 elif not is_blank and self.state == STATE_PATCH_SUBJECT:
200 self.commit.subject = line
202 # Detect the tags we want to remove, and skip blank lines
203 elif re_remove.match(line) and not commit_tag_match:
204 self.skip_blank = True
206 # TEST= should be the last thing in the commit, so remove
207 # everything after it
208 if line.startswith('TEST='):
209 self.found_test = True
210 elif self.skip_blank and is_blank:
211 self.skip_blank = False
213 # Detect the start of a cover letter section
214 elif re_cover.match(line):
215 self.in_section = 'cover'
216 self.skip_blank = False
219 value = cover_cc_match.group(1)
220 self.AddToSeries(line, 'cover-cc', value)
222 # If we are in a change list, key collected lines until a blank one
225 # Blank line ends this change list
229 out = self.ProcessLine(line)
232 self.series.AddChange(self.in_change, self.commit, line)
233 self.skip_blank = False
235 # Detect Series-xxx tags
236 elif series_tag_match:
237 name = series_tag_match.group(1)
238 value = series_tag_match.group(2)
239 if name == 'changes':
240 # value is the version number: e.g. 1, or 2
243 except ValueError as str:
244 raise ValueError("%s: Cannot decode version info '%s'" %
245 (self.commit.hash, line))
246 self.in_change = int(value)
248 self.AddToSeries(line, name, value)
249 self.skip_blank = True
251 # Detect Commit-xxx tags
252 elif commit_tag_match:
253 name = commit_tag_match.group(1)
254 value = commit_tag_match.group(2)
256 self.AddToCommit(line, name, value)
257 self.skip_blank = True
259 # Detect the start of a new commit
262 # TODO: We should store the whole hash, and just display a subset
263 self.commit = commit.Commit(commit_match.group(1)[:8])
265 # Detect tags in the commit message
267 # Remove Tested-by self, since few will take much notice
268 if (tag_match.group(1) == 'Tested-by' and
269 tag_match.group(2).find(os.getenv('USER') + '@') != -1):
270 self.warn.append("Ignoring %s" % line)
271 elif tag_match.group(1) == 'Patch-cc':
272 self.commit.AddCc(tag_match.group(2).split(','))
274 self.tags.append(line);
276 # Suppress duplicate signoffs
279 self.commit.CheckDuplicateSignoff(signoff_match.group(1))):
282 # Well that means this is an ordinary line
285 # Look for ugly ASCII characters
287 # TODO: Would be nicer to report source filename and line
289 self.warn.append("Line %d/%d ('%s') has funny ascii char" %
290 (self.linenum, pos, line))
293 # Look for space before tab
294 m = re_space_before_tab.match(line)
296 self.warn.append('Line %d/%d has space before tab' %
297 (self.linenum, m.start()))
299 # OK, we have a valid non-blank line
302 self.skip_blank = False
303 if self.state == STATE_DIFFS:
306 # If this is the start of the diffs section, emit our tags and
309 self.state = STATE_DIFFS
311 # Output the tags (signeoff first), then change list
313 log = self.series.MakeChangeLog(self.commit)
314 out += self.FormatTags(self.tags)
315 out += [line] + self.commit.notes + [''] + log
316 elif self.found_test:
317 if not re_allowed_after_test.match(line):
318 self.lines_after_test += 1
323 """Close out processing of this patch stream"""
325 if self.lines_after_test:
326 self.warn.append('Found %d lines after TEST=' %
327 self.lines_after_test)
329 def ProcessStream(self, infd, outfd):
330 """Copy a stream from infd to outfd, filtering out unwanting things.
332 This is used to process patch files one at a time.
335 infd: Input stream file object
336 outfd: Output stream file object
338 # Extract the filename from each diff, for nice warnings
341 re_fname = re.compile('diff --git a/(.*) b/.*')
343 line = infd.readline()
346 out = self.ProcessLine(line)
348 # Try to detect blank lines at EOF
350 match = re_fname.match(line)
353 fname = match.group(1)
355 self.blank_count += 1
357 if self.blank_count and (line == '-- ' or match):
358 self.warn.append("Found possible blank line(s) at "
359 "end of file '%s'" % last_fname)
360 outfd.write('+\n' * self.blank_count)
361 outfd.write(line + '\n')
366 def GetMetaDataForList(commit_range, git_dir=None, count=None,
368 """Reads out patch series metadata from the commits
370 This does a 'git log' on the relevant commits and pulls out the tags we
374 commit_range: Range of commits to count (e.g. 'HEAD..base')
375 git_dir: Path to git repositiory (None to use default)
376 count: Number of commits to list, or None for no limit
377 series: Series object to add information into. By default a new series
380 A Series object containing information about the commits.
382 params = ['git', 'log', '--no-color', '--reverse', '--no-decorate',
384 if count is not None:
385 params[2:2] = ['-n%d' % count]
387 params[1:1] = ['--git-dir', git_dir]
389 stdout = command.RunPipe(pipe, capture=True).stdout
390 ps = PatchStream(series, is_log=True)
391 for line in stdout.splitlines():
396 def GetMetaData(start, count):
397 """Reads out patch series metadata from the commits
399 This does a 'git log' on the relevant commits and pulls out the tags we
403 start: Commit to start from: 0=HEAD, 1=next one, etc.
404 count: Number of commits to list
406 return GetMetaDataForList('HEAD~%d' % start, None, count)
408 def FixPatch(backup_dir, fname, series, commit):
409 """Fix up a patch file, by adding/removing as required.
411 We remove our tags from the patch file, insert changes lists, etc.
412 The patch file is processed in place, and overwritten.
414 A backup file is put into backup_dir (if not None).
417 fname: Filename to patch file to process
418 series: Series information about this patch set
419 commit: Commit object for this patch file
421 A list of errors, or [] if all ok.
423 handle, tmpname = tempfile.mkstemp()
424 outfd = os.fdopen(handle, 'w')
425 infd = open(fname, 'r')
426 ps = PatchStream(series)
428 ps.ProcessStream(infd, outfd)
432 # Create a backup file if required
434 shutil.copy(fname, os.path.join(backup_dir, os.path.basename(fname)))
435 shutil.move(tmpname, fname)
438 def FixPatches(series, fnames):
439 """Fix up a list of patches identified by filenames
441 The patch files are processed in place, and overwritten.
444 series: The series object
445 fnames: List of patch files to process
447 # Current workflow creates patches, so we shouldn't need a backup
448 backup_dir = None #tempfile.mkdtemp('clean-patch')
451 commit = series.commits[count]
453 result = FixPatch(backup_dir, fname, series, commit)
455 print '%d warnings for %s:' % (len(result), fname)
460 print 'Cleaned %d patches' % count
463 def InsertCoverLetter(fname, series, count):
464 """Inserts a cover letter with the required info into patch 0
467 fname: Input / output filename of the cover letter file
468 series: Series object
469 count: Number of patches in the series
471 fd = open(fname, 'r')
472 lines = fd.readlines()
475 fd = open(fname, 'w')
477 prefix = series.GetPatchPrefix()
479 if line.startswith('Subject:'):
480 # TODO: if more than 10 patches this should save 00/xx, not 0/xx
481 line = 'Subject: [%s 0/%d] %s\n' % (prefix, count, text[0])
483 # Insert our cover letter
484 elif line.startswith('*** BLURB HERE ***'):
485 # First the blurb test
486 line = '\n'.join(text[1:]) + '\n'
487 if series.get('notes'):
488 line += '\n'.join(series.notes) + '\n'
490 # Now the change list
491 out = series.MakeChangeLog(None)
492 line += '\n' + '\n'.join(out)