1# Copyright (c) 2011 The Chromium OS Authors. 2# 3# See file CREDITS for list of people who contributed to this 4# project. 5# 6# This program is free software; you can redistribute it and/or 7# modify it under the terms of the GNU General Public License as 8# published by the Free Software Foundation; either version 2 of 9# the License, or (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program; if not, write to the Free Software 18# Foundation, Inc., 59 Temple Place, Suite 330, Boston, 19# MA 02111-1307 USA 20# 21 22import os 23import re 24import shutil 25import tempfile 26 27import command 28import commit 29import gitutil 30from series import Series 31 32# Tags that we detect and remove 33re_remove = re.compile('^BUG=|^TEST=|^Change-Id:|^Review URL:' 34 '|Reviewed-on:|Reviewed-by:') 35 36# Lines which are allowed after a TEST= line 37re_allowed_after_test = re.compile('^Signed-off-by:') 38 39# Signoffs 40re_signoff = re.compile('^Signed-off-by:') 41 42# The start of the cover letter 43re_cover = re.compile('^Cover-letter:') 44 45# Patch series tag 46re_series = re.compile('^Series-(\w*): *(.*)') 47 48# Commit tags that we want to collect and keep 49re_tag = re.compile('^(Tested-by|Acked-by|Signed-off-by|Cc): (.*)') 50 51# The start of a new commit in the git log 52re_commit = re.compile('^commit (.*)') 53 54# We detect these since checkpatch doesn't always do it 55re_space_before_tab = re.compile('^[+].* \t') 56 57# States we can be in - can we use range() and still have comments? 58STATE_MSG_HEADER = 0 # Still in the message header 59STATE_PATCH_SUBJECT = 1 # In patch subject (first line of log for a commit) 60STATE_PATCH_HEADER = 2 # In patch header (after the subject) 61STATE_DIFFS = 3 # In the diff part (past --- line) 62 63class PatchStream: 64 """Class for detecting/injecting tags in a patch or series of patches 65 66 We support processing the output of 'git log' to read out the tags we 67 are interested in. We can also process a patch file in order to remove 68 unwanted tags or inject additional ones. These correspond to the two 69 phases of processing. 70 """ 71 def __init__(self, series, name=None, is_log=False): 72 self.skip_blank = False # True to skip a single blank line 73 self.found_test = False # Found a TEST= line 74 self.lines_after_test = 0 # MNumber of lines found after TEST= 75 self.warn = [] # List of warnings we have collected 76 self.linenum = 1 # Output line number we are up to 77 self.in_section = None # Name of start...END section we are in 78 self.notes = [] # Series notes 79 self.section = [] # The current section...END section 80 self.series = series # Info about the patch series 81 self.is_log = is_log # True if indent like git log 82 self.in_change = 0 # Non-zero if we are in a change list 83 self.blank_count = 0 # Number of blank lines stored up 84 self.state = STATE_MSG_HEADER # What state are we in? 85 self.tags = [] # Tags collected, like Tested-by... 86 self.signoff = [] # Contents of signoff line 87 self.commit = None # Current commit 88 89 def AddToSeries(self, line, name, value): 90 """Add a new Series-xxx tag. 91 92 When a Series-xxx tag is detected, we come here to record it, if we 93 are scanning a 'git log'. 94 95 Args: 96 line: Source line containing tag (useful for debug/error messages) 97 name: Tag name (part after 'Series-') 98 value: Tag value (part after 'Series-xxx: ') 99 """ 100 if name == 'notes': 101 self.in_section = name 102 self.skip_blank = False 103 if self.is_log: 104 self.series.AddTag(self.commit, line, name, value) 105 106 def CloseCommit(self): 107 """Save the current commit into our commit list, and reset our state""" 108 if self.commit and self.is_log: 109 self.series.AddCommit(self.commit) 110 self.commit = None 111 112 def FormatTags(self, tags): 113 out_list = [] 114 for tag in sorted(tags): 115 if tag.startswith('Cc:'): 116 tag_list = tag[4:].split(',') 117 out_list += gitutil.BuildEmailList(tag_list, 'Cc:') 118 else: 119 out_list.append(tag) 120 return out_list 121 122 def ProcessLine(self, line): 123 """Process a single line of a patch file or commit log 124 125 This process a line and returns a list of lines to output. The list 126 may be empty or may contain multiple output lines. 127 128 This is where all the complicated logic is located. The class's 129 state is used to move between different states and detect things 130 properly. 131 132 We can be in one of two modes: 133 self.is_log == True: This is 'git log' mode, where most output is 134 indented by 4 characters and we are scanning for tags 135 136 self.is_log == False: This is 'patch' mode, where we already have 137 all the tags, and are processing patches to remove junk we 138 don't want, and add things we think are required. 139 140 Args: 141 line: text line to process 142 143 Returns: 144 list of output lines, or [] if nothing should be output 145 """ 146 # Initially we have no output. Prepare the input line string 147 out = [] 148 line = line.rstrip('\n') 149 if self.is_log: 150 if line[:4] == ' ': 151 line = line[4:] 152 153 # Handle state transition and skipping blank lines 154 series_match = re_series.match(line) 155 commit_match = re_commit.match(line) if self.is_log else None 156 tag_match = None 157 if self.state == STATE_PATCH_HEADER: 158 tag_match = re_tag.match(line) 159 is_blank = not line.strip() 160 if is_blank: 161 if (self.state == STATE_MSG_HEADER 162 or self.state == STATE_PATCH_SUBJECT): 163 self.state += 1 164 165 # We don't have a subject in the text stream of patch files 166 # It has its own line with a Subject: tag 167 if not self.is_log and self.state == STATE_PATCH_SUBJECT: 168 self.state += 1 169 elif commit_match: 170 self.state = STATE_MSG_HEADER 171 172 # If we are in a section, keep collecting lines until we see END 173 if self.in_section: 174 if line == 'END': 175 if self.in_section == 'cover': 176 self.series.cover = self.section 177 elif self.in_section == 'notes': 178 if self.is_log: 179 self.series.notes += self.section 180 else: 181 self.warn.append("Unknown section '%s'" % self.in_section) 182 self.in_section = None 183 self.skip_blank = True 184 self.section = [] 185 else: 186 self.section.append(line) 187 188 # Detect the commit subject 189 elif not is_blank and self.state == STATE_PATCH_SUBJECT: 190 self.commit.subject = line 191 192 # Detect the tags we want to remove, and skip blank lines 193 elif re_remove.match(line): 194 self.skip_blank = True 195 196 # TEST= should be the last thing in the commit, so remove 197 # everything after it 198 if line.startswith('TEST='): 199 self.found_test = True 200 elif self.skip_blank and is_blank: 201 self.skip_blank = False 202 203 # Detect the start of a cover letter section 204 elif re_cover.match(line): 205 self.in_section = 'cover' 206 self.skip_blank = False 207 208 # If we are in a change list, key collected lines until a blank one 209 elif self.in_change: 210 if is_blank: 211 # Blank line ends this change list 212 self.in_change = 0 213 elif line == '---' or re_signoff.match(line): 214 self.in_change = 0 215 out = self.ProcessLine(line) 216 else: 217 if self.is_log: 218 self.series.AddChange(self.in_change, self.commit, line) 219 self.skip_blank = False 220 221 # Detect Series-xxx tags 222 elif series_match: 223 name = series_match.group(1) 224 value = series_match.group(2) 225 if name == 'changes': 226 # value is the version number: e.g. 1, or 2 227 try: 228 value = int(value) 229 except ValueError as str: 230 raise ValueError("%s: Cannot decode version info '%s'" % 231 (self.commit.hash, line)) 232 self.in_change = int(value) 233 else: 234 self.AddToSeries(line, name, value) 235 self.skip_blank = True 236 237 # Detect the start of a new commit 238 elif commit_match: 239 self.CloseCommit() 240 self.commit = commit.Commit(commit_match.group(1)[:7]) 241 242 # Detect tags in the commit message 243 elif tag_match: 244 # Onlly allow a single signoff tag 245 if tag_match.group(1) == 'Signed-off-by': 246 if self.signoff: 247 self.warn.append('Patch has more than one Signed-off-by ' 248 'tag') 249 self.signoff += [line] 250 251 # Remove Tested-by self, since few will take much notice 252 elif (tag_match.group(1) == 'Tested-by' and 253 tag_match.group(2).find(os.getenv('USER') + '@') != -1): 254 self.warn.append("Ignoring %s" % line) 255 elif tag_match.group(1) == 'Cc': 256 self.commit.AddCc(tag_match.group(2).split(',')) 257 else: 258 self.tags.append(line); 259 260 # Well that means this is an ordinary line 261 else: 262 pos = 1 263 # Look for ugly ASCII characters 264 for ch in line: 265 # TODO: Would be nicer to report source filename and line 266 if ord(ch) > 0x80: 267 self.warn.append("Line %d/%d ('%s') has funny ascii char" % 268 (self.linenum, pos, line)) 269 pos += 1 270 271 # Look for space before tab 272 m = re_space_before_tab.match(line) 273 if m: 274 self.warn.append('Line %d/%d has space before tab' % 275 (self.linenum, m.start())) 276 277 # OK, we have a valid non-blank line 278 out = [line] 279 self.linenum += 1 280 self.skip_blank = False 281 if self.state == STATE_DIFFS: 282 pass 283 284 # If this is the start of the diffs section, emit our tags and 285 # change log 286 elif line == '---': 287 self.state = STATE_DIFFS 288 289 # Output the tags (signeoff first), then change list 290 out = [] 291 if self.signoff: 292 out += self.signoff 293 log = self.series.MakeChangeLog(self.commit) 294 out += self.FormatTags(self.tags) 295 out += [line] + log 296 elif self.found_test: 297 if not re_allowed_after_test.match(line): 298 self.lines_after_test += 1 299 300 return out 301 302 def Finalize(self): 303 """Close out processing of this patch stream""" 304 self.CloseCommit() 305 if self.lines_after_test: 306 self.warn.append('Found %d lines after TEST=' % 307 self.lines_after_test) 308 309 def ProcessStream(self, infd, outfd): 310 """Copy a stream from infd to outfd, filtering out unwanting things. 311 312 This is used to process patch files one at a time. 313 314 Args: 315 infd: Input stream file object 316 outfd: Output stream file object 317 """ 318 # Extract the filename from each diff, for nice warnings 319 fname = None 320 last_fname = None 321 re_fname = re.compile('diff --git a/(.*) b/.*') 322 while True: 323 line = infd.readline() 324 if not line: 325 break 326 out = self.ProcessLine(line) 327 328 # Try to detect blank lines at EOF 329 for line in out: 330 match = re_fname.match(line) 331 if match: 332 last_fname = fname 333 fname = match.group(1) 334 if line == '+': 335 self.blank_count += 1 336 else: 337 if self.blank_count and (line == '-- ' or match): 338 self.warn.append("Found possible blank line(s) at " 339 "end of file '%s'" % last_fname) 340 outfd.write('+\n' * self.blank_count) 341 outfd.write(line + '\n') 342 self.blank_count = 0 343 self.Finalize() 344 345 346def GetMetaData(start, count): 347 """Reads out patch series metadata from the commits 348 349 This does a 'git log' on the relevant commits and pulls out the tags we 350 are interested in. 351 352 Args: 353 start: Commit to start from: 0=HEAD, 1=next one, etc. 354 count: Number of commits to list 355 """ 356 pipe = [['git', 'log', '--reverse', 'HEAD~%d' % start, '-n%d' % count]] 357 stdout = command.RunPipe(pipe, capture=True) 358 series = Series() 359 ps = PatchStream(series, is_log=True) 360 for line in stdout.splitlines(): 361 ps.ProcessLine(line) 362 ps.Finalize() 363 return series 364 365def FixPatch(backup_dir, fname, series, commit): 366 """Fix up a patch file, by adding/removing as required. 367 368 We remove our tags from the patch file, insert changes lists, etc. 369 The patch file is processed in place, and overwritten. 370 371 A backup file is put into backup_dir (if not None). 372 373 Args: 374 fname: Filename to patch file to process 375 series: Series information about this patch set 376 commit: Commit object for this patch file 377 Return: 378 A list of errors, or [] if all ok. 379 """ 380 handle, tmpname = tempfile.mkstemp() 381 outfd = os.fdopen(handle, 'w') 382 infd = open(fname, 'r') 383 ps = PatchStream(series) 384 ps.commit = commit 385 ps.ProcessStream(infd, outfd) 386 infd.close() 387 outfd.close() 388 389 # Create a backup file if required 390 if backup_dir: 391 shutil.copy(fname, os.path.join(backup_dir, os.path.basename(fname))) 392 shutil.move(tmpname, fname) 393 return ps.warn 394 395def FixPatches(series, fnames): 396 """Fix up a list of patches identified by filenames 397 398 The patch files are processed in place, and overwritten. 399 400 Args: 401 series: The series object 402 fnames: List of patch files to process 403 """ 404 # Current workflow creates patches, so we shouldn't need a backup 405 backup_dir = None #tempfile.mkdtemp('clean-patch') 406 count = 0 407 for fname in fnames: 408 commit = series.commits[count] 409 commit.patch = fname 410 result = FixPatch(backup_dir, fname, series, commit) 411 if result: 412 print '%d warnings for %s:' % (len(result), fname) 413 for warn in result: 414 print '\t', warn 415 print 416 count += 1 417 print 'Cleaned %d patches' % count 418 return series 419 420def InsertCoverLetter(fname, series, count): 421 """Inserts a cover letter with the required info into patch 0 422 423 Args: 424 fname: Input / output filename of the cover letter file 425 series: Series object 426 count: Number of patches in the series 427 """ 428 fd = open(fname, 'r') 429 lines = fd.readlines() 430 fd.close() 431 432 fd = open(fname, 'w') 433 text = series.cover 434 prefix = series.GetPatchPrefix() 435 for line in lines: 436 if line.startswith('Subject:'): 437 # TODO: if more than 10 patches this should save 00/xx, not 0/xx 438 line = 'Subject: [%s 0/%d] %s\n' % (prefix, count, text[0]) 439 440 # Insert our cover letter 441 elif line.startswith('*** BLURB HERE ***'): 442 # First the blurb test 443 line = '\n'.join(text[1:]) + '\n' 444 if series.get('notes'): 445 line += '\n'.join(series.notes) + '\n' 446 447 # Now the change list 448 out = series.MakeChangeLog(None) 449 line += '\n' + '\n'.join(out) 450 fd.write(line) 451 fd.close() 452