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.signoff = [] # Contents of signoff line
76 self.commit = None # Current commit
78 def AddToSeries(self, line, name, value):
79 """Add a new Series-xxx tag.
81 When a Series-xxx tag is detected, we come here to record it, if we
82 are scanning a 'git log'.
85 line: Source line containing tag (useful for debug/error messages)
86 name: Tag name (part after 'Series-')
87 value: Tag value (part after 'Series-xxx: ')
90 self.in_section = name
91 self.skip_blank = False
93 self.series.AddTag(self.commit, line, name, value)
95 def AddToCommit(self, line, name, value):
96 """Add a new Commit-xxx tag.
98 When a Commit-xxx tag is detected, we come here to record it.
101 line: Source line containing tag (useful for debug/error messages)
102 name: Tag name (part after 'Commit-')
103 value: Tag value (part after 'Commit-xxx: ')
106 self.in_section = 'commit-' + name
107 self.skip_blank = False
109 def CloseCommit(self):
110 """Save the current commit into our commit list, and reset our state"""
111 if self.commit and self.is_log:
112 self.series.AddCommit(self.commit)
115 def ProcessLine(self, line):
116 """Process a single line of a patch file or commit log
118 This process a line and returns a list of lines to output. The list
119 may be empty or may contain multiple output lines.
121 This is where all the complicated logic is located. The class's
122 state is used to move between different states and detect things
125 We can be in one of two modes:
126 self.is_log == True: This is 'git log' mode, where most output is
127 indented by 4 characters and we are scanning for tags
129 self.is_log == False: This is 'patch' mode, where we already have
130 all the tags, and are processing patches to remove junk we
131 don't want, and add things we think are required.
134 line: text line to process
137 list of output lines, or [] if nothing should be output
139 # Initially we have no output. Prepare the input line string
141 line = line.rstrip('\n')
143 commit_match = re_commit.match(line) if self.is_log else None
149 # Handle state transition and skipping blank lines
150 series_tag_match = re_series_tag.match(line)
151 commit_tag_match = re_commit_tag.match(line)
152 cover_cc_match = re_cover_cc.match(line)
153 signoff_match = re_signoff.match(line)
155 if self.state == STATE_PATCH_HEADER:
156 tag_match = re_tag.match(line)
157 is_blank = not line.strip()
159 if (self.state == STATE_MSG_HEADER
160 or self.state == STATE_PATCH_SUBJECT):
163 # We don't have a subject in the text stream of patch files
164 # It has its own line with a Subject: tag
165 if not self.is_log and self.state == STATE_PATCH_SUBJECT:
168 self.state = STATE_MSG_HEADER
170 # If we are in a section, keep collecting lines until we see END
173 if self.in_section == 'cover':
174 self.series.cover = self.section
175 elif self.in_section == 'notes':
177 self.series.notes += self.section
178 elif self.in_section == 'commit-notes':
180 self.commit.notes += self.section
182 self.warn.append("Unknown section '%s'" % self.in_section)
183 self.in_section = None
184 self.skip_blank = True
187 self.section.append(line)
189 # Detect the commit subject
190 elif not is_blank and self.state == STATE_PATCH_SUBJECT:
191 self.commit.subject = line
193 # Detect the tags we want to remove, and skip blank lines
194 elif re_remove.match(line) and not commit_tag_match:
195 self.skip_blank = True
197 # TEST= should be the last thing in the commit, so remove
198 # everything after it
199 if line.startswith('TEST='):
200 self.found_test = True
201 elif self.skip_blank and is_blank:
202 self.skip_blank = False
204 # Detect the start of a cover letter section
205 elif re_cover.match(line):
206 self.in_section = 'cover'
207 self.skip_blank = False
210 value = cover_cc_match.group(1)
211 self.AddToSeries(line, 'cover-cc', value)
213 # If we are in a change list, key collected lines until a blank one
216 # Blank line ends this change list
220 out = self.ProcessLine(line)
223 self.series.AddChange(self.in_change, self.commit, line)
224 self.skip_blank = False
226 # Detect Series-xxx tags
227 elif series_tag_match:
228 name = series_tag_match.group(1)
229 value = series_tag_match.group(2)
230 if name == 'changes':
231 # value is the version number: e.g. 1, or 2
234 except ValueError as str:
235 raise ValueError("%s: Cannot decode version info '%s'" %
236 (self.commit.hash, line))
237 self.in_change = int(value)
239 self.AddToSeries(line, name, value)
240 self.skip_blank = True
242 # Detect Commit-xxx tags
243 elif commit_tag_match:
244 name = commit_tag_match.group(1)
245 value = commit_tag_match.group(2)
247 self.AddToCommit(line, name, value)
248 self.skip_blank = True
250 # Detect the start of a new commit
253 self.commit = commit.Commit(commit_match.group(1))
255 # Detect tags in the commit message
257 # Remove Tested-by self, since few will take much notice
258 if (tag_match.group(1) == 'Tested-by' and
259 tag_match.group(2).find(os.getenv('USER') + '@') != -1):
260 self.warn.append("Ignoring %s" % line)
261 elif tag_match.group(1) == 'Patch-cc':
262 self.commit.AddCc(tag_match.group(2).split(','))
266 # Suppress duplicate signoffs
268 if (self.is_log or not self.commit or
269 self.commit.CheckDuplicateSignoff(signoff_match.group(1))):
272 # Well that means this is an ordinary line
275 # Look for ugly ASCII characters
277 # TODO: Would be nicer to report source filename and line
279 self.warn.append("Line %d/%d ('%s') has funny ascii char" %
280 (self.linenum, pos, line))
283 # Look for space before tab
284 m = re_space_before_tab.match(line)
286 self.warn.append('Line %d/%d has space before tab' %
287 (self.linenum, m.start()))
289 # OK, we have a valid non-blank line
292 self.skip_blank = False
293 if self.state == STATE_DIFFS:
296 # If this is the start of the diffs section, emit our tags and
299 self.state = STATE_DIFFS
301 # Output the tags (signeoff first), then change list
303 log = self.series.MakeChangeLog(self.commit)
306 out += self.commit.notes
308 elif self.found_test:
309 if not re_allowed_after_test.match(line):
310 self.lines_after_test += 1
315 """Close out processing of this patch stream"""
317 if self.lines_after_test:
318 self.warn.append('Found %d lines after TEST=' %
319 self.lines_after_test)
321 def ProcessStream(self, infd, outfd):
322 """Copy a stream from infd to outfd, filtering out unwanting things.
324 This is used to process patch files one at a time.
327 infd: Input stream file object
328 outfd: Output stream file object
330 # Extract the filename from each diff, for nice warnings
333 re_fname = re.compile('diff --git a/(.*) b/.*')
335 line = infd.readline()
338 out = self.ProcessLine(line)
340 # Try to detect blank lines at EOF
342 match = re_fname.match(line)
345 fname = match.group(1)
347 self.blank_count += 1
349 if self.blank_count and (line == '-- ' or match):
350 self.warn.append("Found possible blank line(s) at "
351 "end of file '%s'" % last_fname)
352 outfd.write('+\n' * self.blank_count)
353 outfd.write(line + '\n')
358 def GetMetaDataForList(commit_range, git_dir=None, count=None,
359 series = None, allow_overwrite=False):
360 """Reads out patch series metadata from the commits
362 This does a 'git log' on the relevant commits and pulls out the tags we
366 commit_range: Range of commits to count (e.g. 'HEAD..base')
367 git_dir: Path to git repositiory (None to use default)
368 count: Number of commits to list, or None for no limit
369 series: Series object to add information into. By default a new series
371 allow_overwrite: Allow tags to overwrite an existing tag
373 A Series object containing information about the commits.
377 series.allow_overwrite = allow_overwrite
378 params = gitutil.LogCmd(commit_range,reverse=True, count=count,
380 stdout = command.RunPipe([params], capture=True).stdout
381 ps = PatchStream(series, is_log=True)
382 for line in stdout.splitlines():
387 def GetMetaData(start, count):
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 start: Commit to start from: 0=HEAD, 1=next one, etc.
395 count: Number of commits to list
397 return GetMetaDataForList('HEAD~%d' % start, None, count)
399 def FixPatch(backup_dir, fname, series, commit):
400 """Fix up a patch file, by adding/removing as required.
402 We remove our tags from the patch file, insert changes lists, etc.
403 The patch file is processed in place, and overwritten.
405 A backup file is put into backup_dir (if not None).
408 fname: Filename to patch file to process
409 series: Series information about this patch set
410 commit: Commit object for this patch file
412 A list of errors, or [] if all ok.
414 handle, tmpname = tempfile.mkstemp()
415 outfd = os.fdopen(handle, 'w')
416 infd = open(fname, 'r')
417 ps = PatchStream(series)
419 ps.ProcessStream(infd, outfd)
423 # Create a backup file if required
425 shutil.copy(fname, os.path.join(backup_dir, os.path.basename(fname)))
426 shutil.move(tmpname, fname)
429 def FixPatches(series, fnames):
430 """Fix up a list of patches identified by filenames
432 The patch files are processed in place, and overwritten.
435 series: The series object
436 fnames: List of patch files to process
438 # Current workflow creates patches, so we shouldn't need a backup
439 backup_dir = None #tempfile.mkdtemp('clean-patch')
442 commit = series.commits[count]
444 result = FixPatch(backup_dir, fname, series, commit)
446 print '%d warnings for %s:' % (len(result), fname)
451 print 'Cleaned %d patches' % count
454 def InsertCoverLetter(fname, series, count):
455 """Inserts a cover letter with the required info into patch 0
458 fname: Input / output filename of the cover letter file
459 series: Series object
460 count: Number of patches in the series
462 fd = open(fname, 'r')
463 lines = fd.readlines()
466 fd = open(fname, 'w')
468 prefix = series.GetPatchPrefix()
470 if line.startswith('Subject:'):
471 # TODO: if more than 10 patches this should save 00/xx, not 0/xx
472 line = 'Subject: [%s 0/%d] %s\n' % (prefix, count, text[0])
474 # Insert our cover letter
475 elif line.startswith('*** BLURB HERE ***'):
476 # First the blurb test
477 line = '\n'.join(text[1:]) + '\n'
478 if series.get('notes'):
479 line += '\n'.join(series.notes) + '\n'
481 # Now the change list
482 out = series.MakeChangeLog(None)
483 line += '\n' + '\n'.join(out)