1 # Copyright (c) 2011 The Chromium OS Authors.
3 # SPDX-License-Identifier: GPL-2.0+
15 from series import Series
17 # Tags that we detect and remove
18 re_remove = re.compile('^BUG=|^TEST=|^BRANCH=|^Change-Id:|^Review URL:'
19 '|Reviewed-on:|Commit-\w*:')
21 # Lines which are allowed after a TEST= line
22 re_allowed_after_test = re.compile('^Signed-off-by:')
25 re_signoff = re.compile('^Signed-off-by: *(.*)')
27 # The start of the cover letter
28 re_cover = re.compile('^Cover-letter:')
31 re_cover_cc = re.compile('^Cover-letter-cc: *(.*)')
34 re_series_tag = re.compile('^Series-([a-z-]*): *(.*)')
37 re_commit_tag = re.compile('^Commit-([a-z-]*): *(.*)')
39 # Commit tags that we want to collect and keep
40 re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Patch-cc): (.*)')
42 # The start of a new commit in the git log
43 re_commit = re.compile('^commit ([0-9a-f]*)$')
45 # We detect these since checkpatch doesn't always do it
46 re_space_before_tab = re.compile('^[+].* \t')
48 # States we can be in - can we use range() and still have comments?
49 STATE_MSG_HEADER = 0 # Still in the message header
50 STATE_PATCH_SUBJECT = 1 # In patch subject (first line of log for a commit)
51 STATE_PATCH_HEADER = 2 # In patch header (after the subject)
52 STATE_DIFFS = 3 # In the diff part (past --- line)
55 """Class for detecting/injecting tags in a patch or series of patches
57 We support processing the output of 'git log' to read out the tags we
58 are interested in. We can also process a patch file in order to remove
59 unwanted tags or inject additional ones. These correspond to the two
62 def __init__(self, series, name=None, is_log=False):
63 self.skip_blank = False # True to skip a single blank line
64 self.found_test = False # Found a TEST= line
65 self.lines_after_test = 0 # MNumber of lines found after TEST=
66 self.warn = [] # List of warnings we have collected
67 self.linenum = 1 # Output line number we are up to
68 self.in_section = None # Name of start...END section we are in
69 self.notes = [] # Series notes
70 self.section = [] # The current section...END section
71 self.series = series # Info about the patch series
72 self.is_log = is_log # True if indent like git log
73 self.in_change = 0 # Non-zero if we are in a change list
74 self.blank_count = 0 # Number of blank lines stored up
75 self.state = STATE_MSG_HEADER # What state are we in?
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)
115 # If 'END' is missing in a 'Cover-letter' section, and that section
116 # happens to show up at the very end of the commit message, this is
117 # the chance for us to fix it up.
118 if self.in_section == 'cover' and self.is_log:
119 self.series.cover = self.section
120 self.in_section = None
121 self.skip_blank = True
124 def ProcessLine(self, line):
125 """Process a single line of a patch file or commit log
127 This process a line and returns a list of lines to output. The list
128 may be empty or may contain multiple output lines.
130 This is where all the complicated logic is located. The class's
131 state is used to move between different states and detect things
134 We can be in one of two modes:
135 self.is_log == True: This is 'git log' mode, where most output is
136 indented by 4 characters and we are scanning for tags
138 self.is_log == False: This is 'patch' mode, where we already have
139 all the tags, and are processing patches to remove junk we
140 don't want, and add things we think are required.
143 line: text line to process
146 list of output lines, or [] if nothing should be output
148 # Initially we have no output. Prepare the input line string
150 line = line.rstrip('\n')
152 commit_match = re_commit.match(line) if self.is_log else None
158 # Handle state transition and skipping blank lines
159 series_tag_match = re_series_tag.match(line)
160 commit_tag_match = re_commit_tag.match(line)
161 cover_match = re_cover.match(line)
162 cover_cc_match = re_cover_cc.match(line)
163 signoff_match = re_signoff.match(line)
165 if self.state == STATE_PATCH_HEADER:
166 tag_match = re_tag.match(line)
167 is_blank = not line.strip()
169 if (self.state == STATE_MSG_HEADER
170 or self.state == STATE_PATCH_SUBJECT):
173 # We don't have a subject in the text stream of patch files
174 # It has its own line with a Subject: tag
175 if not self.is_log and self.state == STATE_PATCH_SUBJECT:
178 self.state = STATE_MSG_HEADER
180 # If a tag is detected, or a new commit starts
181 if series_tag_match or commit_tag_match or \
182 cover_match or cover_cc_match or signoff_match or \
183 self.state == STATE_MSG_HEADER:
184 # but we are already in a section, this means 'END' is missing
185 # for that section, fix it up.
187 self.warn.append("Missing 'END' in section '%s'" % self.in_section)
188 if self.in_section == 'cover':
189 self.series.cover = self.section
190 elif self.in_section == 'notes':
192 self.series.notes += self.section
193 elif self.in_section == 'commit-notes':
195 self.commit.notes += self.section
197 self.warn.append("Unknown section '%s'" % self.in_section)
198 self.in_section = None
199 self.skip_blank = True
201 # but we are already in a change list, that means a blank line
202 # is missing, fix it up.
204 self.warn.append("Missing 'blank line' in section 'Series-changes'")
207 # If we are in a section, keep collecting lines until we see END
210 if self.in_section == 'cover':
211 self.series.cover = self.section
212 elif self.in_section == 'notes':
214 self.series.notes += self.section
215 elif self.in_section == 'commit-notes':
217 self.commit.notes += self.section
219 self.warn.append("Unknown section '%s'" % self.in_section)
220 self.in_section = None
221 self.skip_blank = True
224 self.section.append(line)
226 # Detect the commit subject
227 elif not is_blank and self.state == STATE_PATCH_SUBJECT:
228 self.commit.subject = line
230 # Detect the tags we want to remove, and skip blank lines
231 elif re_remove.match(line) and not commit_tag_match:
232 self.skip_blank = True
234 # TEST= should be the last thing in the commit, so remove
235 # everything after it
236 if line.startswith('TEST='):
237 self.found_test = True
238 elif self.skip_blank and is_blank:
239 self.skip_blank = False
241 # Detect the start of a cover letter section
243 self.in_section = 'cover'
244 self.skip_blank = False
247 value = cover_cc_match.group(1)
248 self.AddToSeries(line, 'cover-cc', value)
250 # If we are in a change list, key collected lines until a blank one
253 # Blank line ends this change list
257 out = self.ProcessLine(line)
260 self.series.AddChange(self.in_change, self.commit, line)
261 self.skip_blank = False
263 # Detect Series-xxx tags
264 elif series_tag_match:
265 name = series_tag_match.group(1)
266 value = series_tag_match.group(2)
267 if name == 'changes':
268 # value is the version number: e.g. 1, or 2
271 except ValueError as str:
272 raise ValueError("%s: Cannot decode version info '%s'" %
273 (self.commit.hash, line))
274 self.in_change = int(value)
276 self.AddToSeries(line, name, value)
277 self.skip_blank = True
279 # Detect Commit-xxx tags
280 elif commit_tag_match:
281 name = commit_tag_match.group(1)
282 value = commit_tag_match.group(2)
284 self.AddToCommit(line, name, value)
285 self.skip_blank = True
287 # Detect the start of a new commit
290 self.commit = commit.Commit(commit_match.group(1))
292 # Detect tags in the commit message
294 # Remove Tested-by self, since few will take much notice
295 if (tag_match.group(1) == 'Tested-by' and
296 tag_match.group(2).find(os.getenv('USER') + '@') != -1):
297 self.warn.append("Ignoring %s" % line)
298 elif tag_match.group(1) == 'Patch-cc':
299 self.commit.AddCc(tag_match.group(2).split(','))
303 # Suppress duplicate signoffs
305 if (self.is_log or not self.commit or
306 self.commit.CheckDuplicateSignoff(signoff_match.group(1))):
309 # Well that means this is an ordinary line
311 # Look for space before tab
312 m = re_space_before_tab.match(line)
314 self.warn.append('Line %d/%d has space before tab' %
315 (self.linenum, m.start()))
317 # OK, we have a valid non-blank line
320 self.skip_blank = False
321 if self.state == STATE_DIFFS:
324 # If this is the start of the diffs section, emit our tags and
327 self.state = STATE_DIFFS
329 # Output the tags (signeoff first), then change list
331 log = self.series.MakeChangeLog(self.commit)
334 out += self.commit.notes
336 elif self.found_test:
337 if not re_allowed_after_test.match(line):
338 self.lines_after_test += 1
343 """Close out processing of this patch stream"""
345 if self.lines_after_test:
346 self.warn.append('Found %d lines after TEST=' %
347 self.lines_after_test)
349 def ProcessStream(self, infd, outfd):
350 """Copy a stream from infd to outfd, filtering out unwanting things.
352 This is used to process patch files one at a time.
355 infd: Input stream file object
356 outfd: Output stream file object
358 # Extract the filename from each diff, for nice warnings
361 re_fname = re.compile('diff --git a/(.*) b/.*')
363 line = infd.readline()
366 out = self.ProcessLine(line)
368 # Try to detect blank lines at EOF
370 match = re_fname.match(line)
373 fname = match.group(1)
375 self.blank_count += 1
377 if self.blank_count and (line == '-- ' or match):
378 self.warn.append("Found possible blank line(s) at "
379 "end of file '%s'" % last_fname)
380 outfd.write('+\n' * self.blank_count)
381 outfd.write(line + '\n')
386 def GetMetaDataForList(commit_range, git_dir=None, count=None,
387 series = None, allow_overwrite=False):
388 """Reads out patch series metadata from the commits
390 This does a 'git log' on the relevant commits and pulls out the tags we
394 commit_range: Range of commits to count (e.g. 'HEAD..base')
395 git_dir: Path to git repositiory (None to use default)
396 count: Number of commits to list, or None for no limit
397 series: Series object to add information into. By default a new series
399 allow_overwrite: Allow tags to overwrite an existing tag
401 A Series object containing information about the commits.
405 series.allow_overwrite = allow_overwrite
406 params = gitutil.LogCmd(commit_range, reverse=True, count=count,
408 stdout = command.RunPipe([params], capture=True).stdout
409 ps = PatchStream(series, is_log=True)
410 for line in stdout.splitlines():
415 def GetMetaData(start, count):
416 """Reads out patch series metadata from the commits
418 This does a 'git log' on the relevant commits and pulls out the tags we
422 start: Commit to start from: 0=HEAD, 1=next one, etc.
423 count: Number of commits to list
425 return GetMetaDataForList('HEAD~%d' % start, None, count)
427 def GetMetaDataForTest(text):
428 """Process metadata from a file containing a git log. Used for tests
434 ps = PatchStream(series, is_log=True)
435 for line in text.splitlines():
440 def FixPatch(backup_dir, fname, series, commit):
441 """Fix up a patch file, by adding/removing as required.
443 We remove our tags from the patch file, insert changes lists, etc.
444 The patch file is processed in place, and overwritten.
446 A backup file is put into backup_dir (if not None).
449 fname: Filename to patch file to process
450 series: Series information about this patch set
451 commit: Commit object for this patch file
453 A list of errors, or [] if all ok.
455 handle, tmpname = tempfile.mkstemp()
456 outfd = os.fdopen(handle, 'w')
457 infd = open(fname, 'r')
458 ps = PatchStream(series)
460 ps.ProcessStream(infd, outfd)
464 # Create a backup file if required
466 shutil.copy(fname, os.path.join(backup_dir, os.path.basename(fname)))
467 shutil.move(tmpname, fname)
470 def FixPatches(series, fnames):
471 """Fix up a list of patches identified by filenames
473 The patch files are processed in place, and overwritten.
476 series: The series object
477 fnames: List of patch files to process
479 # Current workflow creates patches, so we shouldn't need a backup
480 backup_dir = None #tempfile.mkdtemp('clean-patch')
483 commit = series.commits[count]
485 result = FixPatch(backup_dir, fname, series, commit)
487 print('%d warnings for %s:' % (len(result), fname))
492 print('Cleaned %d patches' % count)
494 def InsertCoverLetter(fname, series, count):
495 """Inserts a cover letter with the required info into patch 0
498 fname: Input / output filename of the cover letter file
499 series: Series object
500 count: Number of patches in the series
502 fd = open(fname, 'r')
503 lines = fd.readlines()
506 fd = open(fname, 'w')
508 prefix = series.GetPatchPrefix()
510 if line.startswith('Subject:'):
511 # if more than 10 or 100 patches, it should say 00/xx, 000/xxx, etc
512 zero_repeat = int(math.log10(count)) + 1
513 zero = '0' * zero_repeat
514 line = 'Subject: [%s %s/%d] %s\n' % (prefix, zero, count, text[0])
516 # Insert our cover letter
517 elif line.startswith('*** BLURB HERE ***'):
518 # First the blurb test
519 line = '\n'.join(text[1:]) + '\n'
520 if series.get('notes'):
521 line += '\n'.join(series.notes) + '\n'
523 # Now the change list
524 out = series.MakeChangeLog(None)
525 line += '\n' + '\n'.join(out)