| OLD | NEW |
|---|
| (Empty) |
| 1 #!/usr/bin/env python | |
| 2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 3 # Use of this source code is governed by a BSD-style license that can be | |
| 4 # found in the LICENSE file. | |
| 5 | |
| 6 """ | |
| 7 lastchange.py -- Chromium revision fetching utility. | |
| 8 """ | |
| 9 | |
| 10 import re | |
| 11 import optparse | |
| 12 import os | |
| 13 import subprocess | |
| 14 import sys | |
| 15 | |
| 16 _GIT_SVN_ID_REGEX = re.compile(r'.*git-svn-id:\s*([^@]*)@([0-9]+)', re.DOTALL) | |
| 17 | |
| 18 class VersionInfo(object): | |
| 19 def __init__(self, url, revision): | |
| 20 self.url = url | |
| 21 self.revision = revision | |
| 22 | |
| 23 | |
| 24 def FetchSVNRevision(directory, svn_url_regex): | |
| 25 """ | |
| 26 Fetch the Subversion branch and revision for a given directory. | |
| 27 | |
| 28 Errors are swallowed. | |
| 29 | |
| 30 Returns: | |
| 31 A VersionInfo object or None on error. | |
| 32 """ | |
| 33 try: | |
| 34 proc = subprocess.Popen(['svn', 'info'], | |
| 35 stdout=subprocess.PIPE, | |
| 36 stderr=subprocess.PIPE, | |
| 37 cwd=directory, | |
| 38 shell=(sys.platform=='win32')) | |
| 39 except OSError: | |
| 40 # command is apparently either not installed or not executable. | |
| 41 return None | |
| 42 if not proc: | |
| 43 return None | |
| 44 | |
| 45 attrs = {} | |
| 46 for line in proc.stdout: | |
| 47 line = line.strip() | |
| 48 if not line: | |
| 49 continue | |
| 50 key, val = line.split(': ', 1) | |
| 51 attrs[key] = val | |
| 52 | |
| 53 try: | |
| 54 match = svn_url_regex.search(attrs['URL']) | |
| 55 if match: | |
| 56 url = match.group(2) | |
| 57 else: | |
| 58 url = '' | |
| 59 revision = attrs['Revision'] | |
| 60 except KeyError: | |
| 61 return None | |
| 62 | |
| 63 return VersionInfo(url, revision) | |
| 64 | |
| 65 | |
| 66 def RunGitCommand(directory, command): | |
| 67 """ | |
| 68 Launches git subcommand. | |
| 69 | |
| 70 Errors are swallowed. | |
| 71 | |
| 72 Returns: | |
| 73 A process object or None. | |
| 74 """ | |
| 75 command = ['git'] + command | |
| 76 # Force shell usage under cygwin. This is a workaround for | |
| 77 # mysterious loss of cwd while invoking cygwin's git. | |
| 78 # We can't just pass shell=True to Popen, as under win32 this will | |
| 79 # cause CMD to be used, while we explicitly want a cygwin shell. | |
| 80 if sys.platform == 'cygwin': | |
| 81 command = ['sh', '-c', ' '.join(command)] | |
| 82 try: | |
| 83 proc = subprocess.Popen(command, | |
| 84 stdout=subprocess.PIPE, | |
| 85 stderr=subprocess.PIPE, | |
| 86 cwd=directory, | |
| 87 shell=(sys.platform=='win32')) | |
| 88 return proc | |
| 89 except OSError: | |
| 90 return None | |
| 91 | |
| 92 | |
| 93 def FetchGitRevision(directory): | |
| 94 """ | |
| 95 Fetch the Git hash for a given directory. | |
| 96 | |
| 97 Errors are swallowed. | |
| 98 | |
| 99 Returns: | |
| 100 A VersionInfo object or None on error. | |
| 101 """ | |
| 102 hsh = '' | |
| 103 proc = RunGitCommand(directory, ['rev-parse', 'HEAD']) | |
| 104 if proc: | |
| 105 output = proc.communicate()[0].strip() | |
| 106 if proc.returncode == 0 and output: | |
| 107 hsh = output | |
| 108 if not hsh: | |
| 109 return None | |
| 110 pos = '' | |
| 111 proc = RunGitCommand(directory, ['cat-file', 'commit', 'HEAD']) | |
| 112 if proc: | |
| 113 output = proc.communicate()[0] | |
| 114 if proc.returncode == 0 and output: | |
| 115 for line in reversed(output.splitlines()): | |
| 116 if line.startswith('Cr-Commit-Position:'): | |
| 117 pos = line.rsplit()[-1].strip() | |
| 118 break | |
| 119 if not pos: | |
| 120 return VersionInfo('git', hsh) | |
| 121 return VersionInfo('git', '%s-%s' % (hsh, pos)) | |
| 122 | |
| 123 | |
| 124 def FetchGitSVNURLAndRevision(directory, svn_url_regex, go_deeper): | |
| 125 """ | |
| 126 Fetch the Subversion URL and revision through Git. | |
| 127 | |
| 128 Errors are swallowed. | |
| 129 | |
| 130 Returns: | |
| 131 A tuple containing the Subversion URL and revision. | |
| 132 """ | |
| 133 git_args = ['log', '-1', '--format=%b'] | |
| 134 if go_deeper: | |
| 135 git_args.append('--grep=git-svn-id') | |
| 136 proc = RunGitCommand(directory, git_args) | |
| 137 if proc: | |
| 138 output = proc.communicate()[0].strip() | |
| 139 if proc.returncode == 0 and output: | |
| 140 # Extract the latest SVN revision and the SVN URL. | |
| 141 # The target line is the last "git-svn-id: ..." line like this: | |
| 142 # git-svn-id: svn://svn.chromium.org/chrome/trunk/src@85528 0039d316.... | |
| 143 match = _GIT_SVN_ID_REGEX.search(output) | |
| 144 if match: | |
| 145 revision = match.group(2) | |
| 146 url_match = svn_url_regex.search(match.group(1)) | |
| 147 if url_match: | |
| 148 url = url_match.group(2) | |
| 149 else: | |
| 150 url = '' | |
| 151 return url, revision | |
| 152 return None, None | |
| 153 | |
| 154 | |
| 155 def FetchGitSVNRevision(directory, svn_url_regex, go_deeper): | |
| 156 """ | |
| 157 Fetch the Git-SVN identifier for the local tree. | |
| 158 | |
| 159 Errors are swallowed. | |
| 160 """ | |
| 161 url, revision = FetchGitSVNURLAndRevision(directory, svn_url_regex, go_deeper) | |
| 162 if url and revision: | |
| 163 return VersionInfo(url, revision) | |
| 164 return None | |
| 165 | |
| 166 | |
| 167 def FetchVersionInfo(default_lastchange, directory=None, | |
| 168 directory_regex_prior_to_src_url='chrome|blink|svn', | |
| 169 go_deeper=False): | |
| 170 """ | |
| 171 Returns the last change (in the form of a branch, revision tuple), | |
| 172 from some appropriate revision control system. | |
| 173 """ | |
| 174 svn_url_regex = re.compile( | |
| 175 r'.*/(' + directory_regex_prior_to_src_url + r')(/.*)') | |
| 176 | |
| 177 version_info = (FetchSVNRevision(directory, svn_url_regex) or | |
| 178 FetchGitSVNRevision(directory, svn_url_regex, go_deeper) or | |
| 179 FetchGitRevision(directory)) | |
| 180 if not version_info: | |
| 181 if default_lastchange and os.path.exists(default_lastchange): | |
| 182 revision = open(default_lastchange, 'r').read().strip() | |
| 183 version_info = VersionInfo(None, revision) | |
| 184 else: | |
| 185 version_info = VersionInfo(None, None) | |
| 186 return version_info | |
| 187 | |
| 188 def GetHeaderGuard(path): | |
| 189 """ | |
| 190 Returns the header #define guard for the given file path. | |
| 191 This treats everything after the last instance of "src/" as being a | |
| 192 relevant part of the guard. If there is no "src/", then the entire path | |
| 193 is used. | |
| 194 """ | |
| 195 src_index = path.rfind('src/') | |
| 196 if src_index != -1: | |
| 197 guard = path[src_index + 4:] | |
| 198 else: | |
| 199 guard = path | |
| 200 guard = guard.upper() | |
| 201 return guard.replace('/', '_').replace('.', '_').replace('\\', '_') + '_' | |
| 202 | |
| 203 def GetHeaderContents(path, define, version): | |
| 204 """ | |
| 205 Returns what the contents of the header file should be that indicate the given | |
| 206 revision. Note that the #define is specified as a string, even though it's | |
| 207 currently always a SVN revision number, in case we need to move to git hashes. | |
| 208 """ | |
| 209 header_guard = GetHeaderGuard(path) | |
| 210 | |
| 211 header_contents = """/* Generated by lastchange.py, do not edit.*/ | |
| 212 | |
| 213 #ifndef %(header_guard)s | |
| 214 #define %(header_guard)s | |
| 215 | |
| 216 #define %(define)s "%(version)s" | |
| 217 | |
| 218 #endif // %(header_guard)s | |
| 219 """ | |
| 220 header_contents = header_contents % { 'header_guard': header_guard, | |
| 221 'define': define, | |
| 222 'version': version } | |
| 223 return header_contents | |
| 224 | |
| 225 def WriteIfChanged(file_name, contents): | |
| 226 """ | |
| 227 Writes the specified contents to the specified file_name | |
| 228 iff the contents are different than the current contents. | |
| 229 """ | |
| 230 try: | |
| 231 old_contents = open(file_name, 'r').read() | |
| 232 except EnvironmentError: | |
| 233 pass | |
| 234 else: | |
| 235 if contents == old_contents: | |
| 236 return | |
| 237 os.unlink(file_name) | |
| 238 open(file_name, 'w').write(contents) | |
| 239 | |
| 240 | |
| 241 def main(argv=None): | |
| 242 if argv is None: | |
| 243 argv = sys.argv | |
| 244 | |
| 245 parser = optparse.OptionParser(usage="lastchange.py [options]") | |
| 246 parser.add_option("-d", "--default-lastchange", metavar="FILE", | |
| 247 help="Default last change input FILE.") | |
| 248 parser.add_option("-m", "--version-macro", | |
| 249 help="Name of C #define when using --header. Defaults to " + | |
| 250 "LAST_CHANGE.", | |
| 251 default="LAST_CHANGE") | |
| 252 parser.add_option("-o", "--output", metavar="FILE", | |
| 253 help="Write last change to FILE. " + | |
| 254 "Can be combined with --header to write both files.") | |
| 255 parser.add_option("", "--header", metavar="FILE", | |
| 256 help="Write last change to FILE as a C/C++ header. " + | |
| 257 "Can be combined with --output to write both files.") | |
| 258 parser.add_option("--revision-only", action='store_true', | |
| 259 help="Just print the SVN revision number. Overrides any " + | |
| 260 "file-output-related options.") | |
| 261 parser.add_option("-s", "--source-dir", metavar="DIR", | |
| 262 help="Use repository in the given directory.") | |
| 263 parser.add_option("--git-svn-go-deeper", action='store_true', | |
| 264 help="In a Git-SVN repo, dig down to the last committed " + | |
| 265 "SVN change (historic behaviour).") | |
| 266 opts, args = parser.parse_args(argv[1:]) | |
| 267 | |
| 268 out_file = opts.output | |
| 269 header = opts.header | |
| 270 | |
| 271 while len(args) and out_file is None: | |
| 272 if out_file is None: | |
| 273 out_file = args.pop(0) | |
| 274 if args: | |
| 275 sys.stderr.write('Unexpected arguments: %r\n\n' % args) | |
| 276 parser.print_help() | |
| 277 sys.exit(2) | |
| 278 | |
| 279 if opts.source_dir: | |
| 280 src_dir = opts.source_dir | |
| 281 else: | |
| 282 src_dir = os.path.dirname(os.path.abspath(__file__)) | |
| 283 | |
| 284 version_info = FetchVersionInfo(opts.default_lastchange, | |
| 285 directory=src_dir, | |
| 286 go_deeper=opts.git_svn_go_deeper) | |
| 287 | |
| 288 if version_info.revision == None: | |
| 289 version_info.revision = '0' | |
| 290 | |
| 291 if opts.revision_only: | |
| 292 print version_info.revision | |
| 293 else: | |
| 294 contents = "LASTCHANGE=%s\n" % version_info.revision | |
| 295 if not out_file and not opts.header: | |
| 296 sys.stdout.write(contents) | |
| 297 else: | |
| 298 if out_file: | |
| 299 WriteIfChanged(out_file, contents) | |
| 300 if header: | |
| 301 WriteIfChanged(header, | |
| 302 GetHeaderContents(header, opts.version_macro, | |
| 303 version_info.revision)) | |
| 304 | |
| 305 return 0 | |
| 306 | |
| 307 | |
| 308 if __name__ == '__main__': | |
| 309 sys.exit(main()) | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2392643003:
Removes files from //build that we don't need (Closed)
