| 1 | """Python GIT interface |
| 2 | """ |
| 3 | |
| 4 | __copyright__ = """ |
| 5 | Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License version 2 as |
| 9 | published by the Free Software Foundation. |
| 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, MA 02111-1307 USA |
| 19 | """ |
| 20 | |
| 21 | import sys, os, glob, popen2 |
| 22 | |
| 23 | from stgit.utils import * |
| 24 | |
| 25 | # git exception class |
| 26 | class GitException(Exception): |
| 27 | pass |
| 28 | |
| 29 | |
| 30 | # Different start-up variables read from the environment |
| 31 | if 'GIT_DIR' in os.environ: |
| 32 | base_dir = os.environ['GIT_DIR'] |
| 33 | else: |
| 34 | base_dir = '.git' |
| 35 | |
| 36 | head_link = os.path.join(base_dir, 'HEAD') |
| 37 | |
| 38 | # |
| 39 | # Classes |
| 40 | # |
| 41 | class Commit: |
| 42 | """Handle the commit objects |
| 43 | """ |
| 44 | def __init__(self, id_hash): |
| 45 | self.__id_hash = id_hash |
| 46 | |
| 47 | lines = _output_lines('git-cat-file commit %s' % id_hash) |
| 48 | for i in range(len(lines)): |
| 49 | line = lines[i] |
| 50 | if line == '\n': |
| 51 | break |
| 52 | field = line.strip().split(' ', 1) |
| 53 | if field[0] == 'tree': |
| 54 | self.__tree = field[1] |
| 55 | elif field[0] == 'parent': |
| 56 | self.__parent = field[1] |
| 57 | if field[0] == 'author': |
| 58 | self.__author = field[1] |
| 59 | if field[0] == 'comitter': |
| 60 | self.__committer = field[1] |
| 61 | self.__log = ''.join(lines[i:]) |
| 62 | |
| 63 | def get_id_hash(self): |
| 64 | return self.__id_hash |
| 65 | |
| 66 | def get_tree(self): |
| 67 | return self.__tree |
| 68 | |
| 69 | def get_parent(self): |
| 70 | return self.__parent |
| 71 | |
| 72 | def get_author(self): |
| 73 | return self.__author |
| 74 | |
| 75 | def get_committer(self): |
| 76 | return self.__committer |
| 77 | |
| 78 | # dictionary of Commit objects, used to avoid multiple calls to git |
| 79 | __commits = dict() |
| 80 | |
| 81 | # |
| 82 | # Functions |
| 83 | # |
| 84 | def get_commit(id_hash): |
| 85 | """Commit objects factory. Save/look-up them in the __commits |
| 86 | dictionary |
| 87 | """ |
| 88 | if id_hash in __commits: |
| 89 | return __commits[id_hash] |
| 90 | else: |
| 91 | commit = Commit(id_hash) |
| 92 | __commits[id_hash] = commit |
| 93 | return commit |
| 94 | |
| 95 | def get_conflicts(): |
| 96 | """Return the list of file conflicts |
| 97 | """ |
| 98 | conflicts_file = os.path.join(base_dir, 'conflicts') |
| 99 | if os.path.isfile(conflicts_file): |
| 100 | f = file(conflicts_file) |
| 101 | names = [line.strip() for line in f.readlines()] |
| 102 | f.close() |
| 103 | return names |
| 104 | else: |
| 105 | return None |
| 106 | |
| 107 | def _input(cmd, file_desc): |
| 108 | p = popen2.Popen3(cmd) |
| 109 | for line in file_desc: |
| 110 | p.tochild.write(line) |
| 111 | p.tochild.close() |
| 112 | if p.wait(): |
| 113 | raise GitException, '%s failed' % str(cmd) |
| 114 | |
| 115 | def _output(cmd): |
| 116 | p=popen2.Popen3(cmd) |
| 117 | string = p.fromchild.read() |
| 118 | if p.wait(): |
| 119 | raise GitException, '%s failed' % str(cmd) |
| 120 | return string |
| 121 | |
| 122 | def _output_one_line(cmd): |
| 123 | p=popen2.Popen3(cmd) |
| 124 | string = p.fromchild.readline().strip() |
| 125 | if p.wait(): |
| 126 | raise GitException, '%s failed' % str(cmd) |
| 127 | return string |
| 128 | |
| 129 | def _output_lines(cmd): |
| 130 | p=popen2.Popen3(cmd) |
| 131 | lines = p.fromchild.readlines() |
| 132 | if p.wait(): |
| 133 | raise GitException, '%s failed' % str(cmd) |
| 134 | return lines |
| 135 | |
| 136 | def __run(cmd, args=None): |
| 137 | """__run: runs cmd using spawnvp. |
| 138 | |
| 139 | Runs cmd using spawnvp. The shell is avoided so it won't mess up |
| 140 | our arguments. If args is very large, the command is run multiple |
| 141 | times; args is split xargs style: cmd is passed on each |
| 142 | invocation. Unlike xargs, returns immediately if any non-zero |
| 143 | return code is received. |
| 144 | """ |
| 145 | |
| 146 | args_l=cmd.split() |
| 147 | if args is None: |
| 148 | args = [] |
| 149 | for i in range(0, len(args)+1, 100): |
| 150 | r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))]) |
| 151 | if r: |
| 152 | return r |
| 153 | return 0 |
| 154 | |
| 155 | def __check_base_dir(): |
| 156 | return os.path.isdir(base_dir) |
| 157 | |
| 158 | def __tree_status(files = [], tree_id = 'HEAD', unknown = False): |
| 159 | """Returns a list of pairs - [status, filename] |
| 160 | """ |
| 161 | os.system('git-update-cache --refresh > /dev/null') |
| 162 | |
| 163 | cache_files = [] |
| 164 | |
| 165 | # unknown files |
| 166 | if unknown: |
| 167 | exclude_file = os.path.join(base_dir, 'exclude') |
| 168 | extra_exclude = [] |
| 169 | if os.path.exists(exclude_file): |
| 170 | extra_exclude.append('--exclude-from=%s' % exclude_file) |
| 171 | lines = _output_lines(['git-ls-files', '--others', |
| 172 | '--exclude=*.[ao]', '--exclude=.*' |
| 173 | '--exclude=TAGS', '--exclude=tags', '--exclude=*~', |
| 174 | '--exclude=#*'] + extra_exclude) |
| 175 | cache_files += [('?', line.strip()) for line in lines] |
| 176 | |
| 177 | # conflicted files |
| 178 | conflicts = get_conflicts() |
| 179 | if not conflicts: |
| 180 | conflicts = [] |
| 181 | cache_files += [('C', filename) for filename in conflicts] |
| 182 | |
| 183 | # the rest |
| 184 | for line in _output_lines(['git-diff-cache', '-r', tree_id] + files): |
| 185 | fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1)) |
| 186 | if fs[1] not in conflicts: |
| 187 | cache_files.append(fs) |
| 188 | |
| 189 | return cache_files |
| 190 | |
| 191 | def local_changes(): |
| 192 | """Return true if there are local changes in the tree |
| 193 | """ |
| 194 | return len(__tree_status()) != 0 |
| 195 | |
| 196 | def get_head(): |
| 197 | """Returns a string representing the HEAD |
| 198 | """ |
| 199 | return read_string(head_link) |
| 200 | |
| 201 | def get_head_file(): |
| 202 | """Returns the name of the file pointed to by the HEAD link |
| 203 | """ |
| 204 | # valid link |
| 205 | if os.path.islink(head_link) and os.path.isfile(head_link): |
| 206 | return os.path.basename(os.readlink(head_link)) |
| 207 | else: |
| 208 | raise GitException, 'Invalid .git/HEAD link. Git tree not initialised?' |
| 209 | |
| 210 | def __set_head(val): |
| 211 | """Sets the HEAD value |
| 212 | """ |
| 213 | write_string(head_link, val) |
| 214 | |
| 215 | def add(names): |
| 216 | """Add the files or recursively add the directory contents |
| 217 | """ |
| 218 | # generate the file list |
| 219 | files = [] |
| 220 | for i in names: |
| 221 | if not os.path.exists(i): |
| 222 | raise GitException, 'Unknown file or directory: %s' % i |
| 223 | |
| 224 | if os.path.isdir(i): |
| 225 | # recursive search. We only add files |
| 226 | for root, dirs, local_files in os.walk(i): |
| 227 | for name in [os.path.join(root, f) for f in local_files]: |
| 228 | if os.path.isfile(name): |
| 229 | files.append(os.path.normpath(name)) |
| 230 | elif os.path.isfile(i): |
| 231 | files.append(os.path.normpath(i)) |
| 232 | else: |
| 233 | raise GitException, '%s is not a file or directory' % i |
| 234 | |
| 235 | if files: |
| 236 | if __run('git-update-cache --add --', files): |
| 237 | raise GitException, 'Unable to add file' |
| 238 | |
| 239 | def rm(files, force = False): |
| 240 | """Remove a file from the repository |
| 241 | """ |
| 242 | if force: |
| 243 | git_opt = '--force-remove' |
| 244 | else: |
| 245 | git_opt = '--remove' |
| 246 | |
| 247 | if not force: |
| 248 | for f in files: |
| 249 | if os.path.exists(f): |
| 250 | raise GitException, '%s exists. Remove it first' %f |
| 251 | if files: |
| 252 | __run('git-update-cache --remove --', files) |
| 253 | else: |
| 254 | if files: |
| 255 | __run('git-update-cache --force-remove --', files) |
| 256 | |
| 257 | def update_cache(files): |
| 258 | """Update the cache information for the given files |
| 259 | """ |
| 260 | files_here = [] |
| 261 | files_gone = [] |
| 262 | |
| 263 | for f in files: |
| 264 | if os.path.exists(f): |
| 265 | files_here.append(f) |
| 266 | else: |
| 267 | files_gone.append(f) |
| 268 | |
| 269 | if files_here: |
| 270 | __run('git-update-cache --', files_here) |
| 271 | if files_gone: |
| 272 | __run('git-update-cache --remove --', files_gone) |
| 273 | |
| 274 | def commit(message, files = [], parents = [], allowempty = False, |
| 275 | author_name = None, author_email = None, author_date = None, |
| 276 | committer_name = None, committer_email = None): |
| 277 | """Commit the current tree to repository |
| 278 | """ |
| 279 | first = (parents == []) |
| 280 | |
| 281 | # Get the tree status |
| 282 | if not first: |
| 283 | cache_files = __tree_status(files) |
| 284 | |
| 285 | if not first and len(cache_files) == 0 and not allowempty: |
| 286 | raise GitException, 'No changes to commit' |
| 287 | |
| 288 | # check for unresolved conflicts |
| 289 | if not first and len(filter(lambda x: x[0] not in ['M', 'N', 'A', 'D'], |
| 290 | cache_files)) != 0: |
| 291 | raise GitException, 'Commit failed: unresolved conflicts' |
| 292 | |
| 293 | # get the commit message |
| 294 | f = file('.commitmsg', 'w+') |
| 295 | if message[-1] == '\n': |
| 296 | f.write(message) |
| 297 | else: |
| 298 | print >> f, message |
| 299 | f.close() |
| 300 | |
| 301 | # update the cache |
| 302 | if not first: |
| 303 | add_files=[] |
| 304 | rm_files=[] |
| 305 | m_files=[] |
| 306 | for f in cache_files: |
| 307 | if f[0] in ['N', 'A']: |
| 308 | add_files.append(f[1]) |
| 309 | elif f[0] == 'D': |
| 310 | rm_files.append(f[1]) |
| 311 | else: |
| 312 | m_files.append(f[1]) |
| 313 | |
| 314 | if add_files: |
| 315 | if __run('git-update-cache --add --', add_files): |
| 316 | raise GitException, 'Failed git-update-cache --add' |
| 317 | if rm_files: |
| 318 | if __run('git-update-cache --force-remove --', rm_files): |
| 319 | raise GitException, 'Failed git-update-cache --rm' |
| 320 | if m_files: |
| 321 | if __run('git-update-cache --', m_files): |
| 322 | raise GitException, 'Failed git-update-cache' |
| 323 | |
| 324 | # write the index to repository |
| 325 | tree_id = _output_one_line('git-write-tree') |
| 326 | |
| 327 | # the commit |
| 328 | cmd = '' |
| 329 | if author_name: |
| 330 | cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name |
| 331 | if author_email: |
| 332 | cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email |
| 333 | if author_date: |
| 334 | cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date |
| 335 | if committer_name: |
| 336 | cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name |
| 337 | if committer_email: |
| 338 | cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email |
| 339 | cmd += 'git-commit-tree %s' % tree_id |
| 340 | |
| 341 | # get the parents |
| 342 | for p in parents: |
| 343 | cmd += ' -p %s' % p |
| 344 | |
| 345 | cmd += ' < .commitmsg' |
| 346 | |
| 347 | commit_id = _output_one_line(cmd) |
| 348 | __set_head(commit_id) |
| 349 | os.remove('.commitmsg') |
| 350 | |
| 351 | return commit_id |
| 352 | |
| 353 | def merge(base, head1, head2): |
| 354 | """Perform a 3-way merge between base, head1 and head2 into the |
| 355 | local tree |
| 356 | """ |
| 357 | if __run('git-read-tree -u -m', [base, head1, head2]) != 0: |
| 358 | raise GitException, 'git-read-tree failed (local changes maybe?)' |
| 359 | |
| 360 | # this can fail if there are conflicts |
| 361 | if os.system('git-merge-cache -o gitmergeonefile.py -a') != 0: |
| 362 | raise GitException, 'git-merge-cache failed (possible conflicts)' |
| 363 | |
| 364 | # this should not fail |
| 365 | if os.system('git-checkout-cache -f -a') != 0: |
| 366 | raise GitException, 'Failed git-checkout-cache' |
| 367 | |
| 368 | def status(files = [], modified = False, new = False, deleted = False, |
| 369 | conflict = False, unknown = False): |
| 370 | """Show the tree status |
| 371 | """ |
| 372 | cache_files = __tree_status(files, unknown = True) |
| 373 | all = not (modified or new or deleted or conflict or unknown) |
| 374 | |
| 375 | if not all: |
| 376 | filestat = [] |
| 377 | if modified: |
| 378 | filestat.append('M') |
| 379 | if new: |
| 380 | filestat.append('A') |
| 381 | filestat.append('N') |
| 382 | if deleted: |
| 383 | filestat.append('D') |
| 384 | if conflict: |
| 385 | filestat.append('C') |
| 386 | if unknown: |
| 387 | filestat.append('?') |
| 388 | cache_files = filter(lambda x: x[0] in filestat, cache_files) |
| 389 | |
| 390 | for fs in cache_files: |
| 391 | if all: |
| 392 | print '%s %s' % (fs[0], fs[1]) |
| 393 | else: |
| 394 | print '%s' % fs[1] |
| 395 | |
| 396 | def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None): |
| 397 | """Show the diff between rev1 and rev2 |
| 398 | """ |
| 399 | os.system('git-update-cache --refresh > /dev/null') |
| 400 | |
| 401 | if rev2: |
| 402 | diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files) |
| 403 | else: |
| 404 | diff_str = _output(['git-diff-cache', '-p', rev1] + files) |
| 405 | |
| 406 | if out_fd: |
| 407 | out_fd.write(diff_str) |
| 408 | else: |
| 409 | return diff_str |
| 410 | |
| 411 | def diffstat(files = [], rev1 = 'HEAD', rev2 = None): |
| 412 | """Return the diffstat between rev1 and rev2 |
| 413 | """ |
| 414 | |
| 415 | os.system('git-update-cache --refresh > /dev/null') |
| 416 | p=popen2.Popen3('git-apply --stat') |
| 417 | diff(files, rev1, rev2, p.tochild) |
| 418 | p.tochild.close() |
| 419 | str = p.fromchild.read().rstrip() |
| 420 | if p.wait(): |
| 421 | raise GitException, 'git.diffstat failed' |
| 422 | return str |
| 423 | |
| 424 | def files(rev1, rev2): |
| 425 | """Return the files modified between rev1 and rev2 |
| 426 | """ |
| 427 | os.system('git-update-cache --refresh > /dev/null') |
| 428 | |
| 429 | str = '' |
| 430 | for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)): |
| 431 | str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1)) |
| 432 | |
| 433 | return str.rstrip() |
| 434 | |
| 435 | def checkout(files = [], tree_id = None, force = False): |
| 436 | """Check out the given or all files |
| 437 | """ |
| 438 | if tree_id and __run('git-read-tree -m', [tree_id]) != 0: |
| 439 | raise GitException, 'Failed git-read-tree -m %s' % tree_id |
| 440 | |
| 441 | checkout_cmd = 'git-checkout-cache -q -u' |
| 442 | if force: |
| 443 | checkout_cmd += ' -f' |
| 444 | if len(files) == 0: |
| 445 | checkout_cmd += ' -a' |
| 446 | else: |
| 447 | checkout_cmd += ' --' |
| 448 | |
| 449 | if __run(checkout_cmd, files) != 0: |
| 450 | raise GitException, 'Failed git-checkout-cache' |
| 451 | |
| 452 | def switch(tree_id): |
| 453 | """Switch the tree to the given id |
| 454 | """ |
| 455 | to_delete = filter(lambda x: x[0] in ['N', 'A'], |
| 456 | __tree_status(tree_id = tree_id)) |
| 457 | |
| 458 | checkout(tree_id = tree_id, force = True) |
| 459 | __set_head(tree_id) |
| 460 | |
| 461 | # checkout doesn't remove files |
| 462 | for fs in to_delete: |
| 463 | os.remove(fs[1]) |
| 464 | |
| 465 | def pull(location, head = None, tag = None): |
| 466 | """Fetch changes from the remote repository. At the moment, just |
| 467 | use the 'git fetch' scripts |
| 468 | """ |
| 469 | args = [location] |
| 470 | if head: |
| 471 | args += [head] |
| 472 | elif tag: |
| 473 | args += ['tag', tag] |
| 474 | |
| 475 | if __run('git pull', args) != 0: |
| 476 | raise GitException, 'Failed "git fetch %s"' % location |
| 477 | |
| 478 | def apply_patch(filename = None): |
| 479 | """Apply a patch onto the current index. There must not be any |
| 480 | local changes in the tree, otherwise the command fails |
| 481 | """ |
| 482 | os.system('git-update-cache --refresh > /dev/null') |
| 483 | |
| 484 | if filename: |
| 485 | if __run('git-apply --index', [filename]) != 0: |
| 486 | raise GitException, 'Patch does not apply cleanly' |
| 487 | else: |
| 488 | _input('git-apply --index', sys.stdin) |
| 489 | |
| 490 | def clone(repository, local_dir): |
| 491 | """Clone a remote repository. At the moment, just use the |
| 492 | 'git clone' script |
| 493 | """ |
| 494 | if __run('git clone', [repository, local_dir]) != 0: |
| 495 | raise GitException, 'Failed "git clone %s %s"' \ |
| 496 | % (repository, local_dir) |