chiark - git - mdw - stgit/blob - stgit/stack.py

   1 """Basic quilt-like functionality
   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, re
  22
  23 from stgit.utils import *
  24 from stgit import git, basedir, templates
  25 from stgit.config import config
  26
  27
  28 # stack exception class
  29 class StackException(Exception):
  30     pass
  31
  32 class FilterUntil:
  33     def __init__(self):
  34         self.should_print = True
  35     def __call__(self, x, until_test, prefix):
  36         if until_test(x):
  37             self.should_print = False
  38         if self.should_print:
  39             return x[0:len(prefix)] != prefix
  40         return False
  41
  42 #
  43 # Functions
  44 #
  45 __comment_prefix = 'STG:'
  46 __patch_prefix = 'STG_PATCH:'
  47
  48 def __clean_comments(f):
  49     """Removes lines marked for status in a commit file
  50     """
  51     f.seek(0)
  52
  53     # remove status-prefixed lines
  54     lines = f.readlines()
  55
  56     patch_filter = FilterUntil()
  57     until_test = lambda t: t == (__patch_prefix + '\n')
  58     lines = [l for l in lines if patch_filter(l, until_test, __comment_prefix)]
  59
  60     # remove empty lines at the end
  61     while len(lines) != 0 and lines[-1] == '\n':
  62         del lines[-1]
  63
  64     f.seek(0); f.truncate()
  65     f.writelines(lines)
  66
  67 def edit_file(series, line, comment, show_patch = True):
  68     fname = '.stgitmsg.txt'
  69     tmpl = templates.get_template('patchdescr.tmpl')
  70
  71     f = file(fname, 'w+')
  72     if line:
  73         print >> f, line
  74     elif tmpl:
  75         print >> f, tmpl,
  76     else:
  77         print >> f
  78     print >> f, __comment_prefix, comment
  79     print >> f, __comment_prefix, \
  80           'Lines prefixed with "%s" will be automatically removed.' \
  81           % __comment_prefix
  82     print >> f, __comment_prefix, \
  83           'Trailing empty lines will be automatically removed.'
  84
  85     if show_patch:
  86        print >> f, __patch_prefix
  87        # series.get_patch(series.get_current()).get_top()
  88        git.diff([], series.get_patch(series.get_current()).get_bottom(), None, f)
  89
  90     #Vim modeline must be near the end.
  91     print >> f, __comment_prefix, 'vi: set textwidth=75 filetype=diff nobackup:'
  92     f.close()
  93
  94     call_editor(fname)
  95
  96     f = file(fname, 'r+')
  97
  98     __clean_comments(f)
  99     f.seek(0)
 100     result = f.read()
 101
 102     f.close()
 103     os.remove(fname)
 104
 105     return result
 106
 107 #
 108 # Classes
 109 #
 110
 111 class StgitObject:
 112     """An object with stgit-like properties stored as files in a directory
 113     """
 114     def _set_dir(self, dir):
 115         self.__dir = dir
 116     def _dir(self):
 117         return self.__dir
 118
 119     def create_empty_field(self, name):
 120         create_empty_file(os.path.join(self.__dir, name))
 121
 122     def _get_field(self, name, multiline = False):
 123         id_file = os.path.join(self.__dir, name)
 124         if os.path.isfile(id_file):
 125             line = read_string(id_file, multiline)
 126             if line == '':
 127                 return None
 128             else:
 129                 return line
 130         else:
 131             return None
 132
 133     def _set_field(self, name, value, multiline = False):
 134         fname = os.path.join(self.__dir, name)
 135         if value and value != '':
 136             write_string(fname, value, multiline)
 137         elif os.path.isfile(fname):
 138             os.remove(fname)
 139
 140
 141 class Patch(StgitObject):
 142     """Basic patch implementation
 143     """
 144     def __init__(self, name, series_dir, refs_dir):
 145         self.__series_dir = series_dir
 146         self.__name = name
 147         self._set_dir(os.path.join(self.__series_dir, self.__name))
 148         self.__refs_dir = refs_dir
 149         self.__top_ref_file = os.path.join(self.__refs_dir, self.__name)
 150         self.__log_ref_file = os.path.join(self.__refs_dir,
 151                                            self.__name + '.log')
 152
 153     def create(self):
 154         os.mkdir(self._dir())
 155         self.create_empty_field('bottom')
 156         self.create_empty_field('top')
 157
 158     def delete(self):
 159         for f in os.listdir(self._dir()):
 160             os.remove(os.path.join(self._dir(), f))
 161         os.rmdir(self._dir())
 162         os.remove(self.__top_ref_file)
 163         if os.path.exists(self.__log_ref_file):
 164             os.remove(self.__log_ref_file)
 165
 166     def get_name(self):
 167         return self.__name
 168
 169     def rename(self, newname):
 170         olddir = self._dir()
 171         old_top_ref_file = self.__top_ref_file
 172         old_log_ref_file = self.__log_ref_file
 173         self.__name = newname
 174         self._set_dir(os.path.join(self.__series_dir, self.__name))
 175         self.__top_ref_file = os.path.join(self.__refs_dir, self.__name)
 176         self.__log_ref_file = os.path.join(self.__refs_dir,
 177                                            self.__name + '.log')
 178
 179         os.rename(olddir, self._dir())
 180         os.rename(old_top_ref_file, self.__top_ref_file)
 181         if os.path.exists(old_log_ref_file):
 182             os.rename(old_log_ref_file, self.__log_ref_file)
 183
 184     def __update_top_ref(self, ref):
 185         write_string(self.__top_ref_file, ref)
 186
 187     def __update_log_ref(self, ref):
 188         write_string(self.__log_ref_file, ref)
 189
 190     def update_top_ref(self):
 191         top = self.get_top()
 192         if top:
 193             self.__update_top_ref(top)
 194
 195     def get_old_bottom(self):
 196         return self._get_field('bottom.old')
 197
 198     def get_bottom(self):
 199         return self._get_field('bottom')
 200
 201     def set_bottom(self, value, backup = False):
 202         if backup:
 203             curr = self._get_field('bottom')
 204             self._set_field('bottom.old', curr)
 205         self._set_field('bottom', value)
 206
 207     def get_old_top(self):
 208         return self._get_field('top.old')
 209
 210     def get_top(self):
 211         return self._get_field('top')
 212
 213     def set_top(self, value, backup = False):
 214         if backup:
 215             curr = self._get_field('top')
 216             self._set_field('top.old', curr)
 217         self._set_field('top', value)
 218         self.__update_top_ref(value)
 219
 220     def restore_old_boundaries(self):
 221         bottom = self._get_field('bottom.old')
 222         top = self._get_field('top.old')
 223
 224         if top and bottom:
 225             self._set_field('bottom', bottom)
 226             self._set_field('top', top)
 227             self.__update_top_ref(top)
 228             return True
 229         else:
 230             return False
 231
 232     def get_description(self):
 233         return self._get_field('description', True)
 234
 235     def set_description(self, line):
 236         self._set_field('description', line, True)
 237
 238     def get_authname(self):
 239         return self._get_field('authname')
 240
 241     def set_authname(self, name):
 242         self._set_field('authname', name or git.author().name)
 243
 244     def get_authemail(self):
 245         return self._get_field('authemail')
 246
 247     def set_authemail(self, email):
 248         self._set_field('authemail', email or git.author().email)
 249
 250     def get_authdate(self):
 251         return self._get_field('authdate')
 252
 253     def set_authdate(self, date):
 254         self._set_field('authdate', date or git.author().date)
 255
 256     def get_commname(self):
 257         return self._get_field('commname')
 258
 259     def set_commname(self, name):
 260         self._set_field('commname', name or git.committer().name)
 261
 262     def get_commemail(self):
 263         return self._get_field('commemail')
 264
 265     def set_commemail(self, email):
 266         self._set_field('commemail', email or git.committer().email)
 267
 268     def get_log(self):
 269         return self._get_field('log')
 270
 271     def set_log(self, value, backup = False):
 272         self._set_field('log', value)
 273         self.__update_log_ref(value)
 274
 275
 276 class Series(StgitObject):
 277     """Class including the operations on series
 278     """
 279     def __init__(self, name = None):
 280         """Takes a series name as the parameter.
 281         """
 282         try:
 283             if name:
 284                 self.__name = name
 285             else:
 286                 self.__name = git.get_head_file()
 287             self.__base_dir = basedir.get()
 288         except git.GitException, ex:
 289             raise StackException, 'GIT tree not initialised: %s' % ex
 290
 291         self._set_dir(os.path.join(self.__base_dir, 'patches', self.__name))
 292         self.__refs_dir = os.path.join(self.__base_dir, 'refs', 'patches',
 293                                        self.__name)
 294         self.__base_file = os.path.join(self.__base_dir, 'refs', 'bases',
 295                                         self.__name)
 296
 297         self.__applied_file = os.path.join(self._dir(), 'applied')
 298         self.__unapplied_file = os.path.join(self._dir(), 'unapplied')
 299         self.__hidden_file = os.path.join(self._dir(), 'hidden')
 300         self.__current_file = os.path.join(self._dir(), 'current')
 301         self.__descr_file = os.path.join(self._dir(), 'description')
 302
 303         # where this series keeps its patches
 304         self.__patch_dir = os.path.join(self._dir(), 'patches')
 305         if not os.path.isdir(self.__patch_dir):
 306             self.__patch_dir = self._dir()
 307
 308         # if no __refs_dir, create and populate it (upgrade old repositories)
 309         if self.is_initialised() and not os.path.isdir(self.__refs_dir):
 310             os.makedirs(self.__refs_dir)
 311             for patch in self.get_applied() + self.get_unapplied():
 312                 self.get_patch(patch).update_top_ref()
 313
 314         # trash directory
 315         self.__trash_dir = os.path.join(self._dir(), 'trash')
 316         if self.is_initialised() and not os.path.isdir(self.__trash_dir):
 317             os.makedirs(self.__trash_dir)
 318
 319     def __patch_name_valid(self, name):
 320         """Raise an exception if the patch name is not valid.
 321         """
 322         if not name or re.search('[^\w.-]', name):
 323             raise StackException, 'Invalid patch name: "%s"' % name
 324
 325     def get_branch(self):
 326         """Return the branch name for the Series object
 327         """
 328         return self.__name
 329
 330     def __set_current(self, name):
 331         """Sets the topmost patch
 332         """
 333         self._set_field('current', name)
 334
 335     def get_patch(self, name):
 336         """Return a Patch object for the given name
 337         """
 338         return Patch(name, self.__patch_dir, self.__refs_dir)
 339
 340     def get_current_patch(self):
 341         """Return a Patch object representing the topmost patch, or
 342         None if there is no such patch."""
 343         crt = self.get_current()
 344         if not crt:
 345             return None
 346         return Patch(crt, self.__patch_dir, self.__refs_dir)
 347
 348     def get_current(self):
 349         """Return the name of the topmost patch, or None if there is
 350         no such patch."""
 351         name = self._get_field('current')
 352         if name == '':
 353             return None
 354         else:
 355             return name
 356
 357     def get_applied(self):
 358         if not os.path.isfile(self.__applied_file):
 359             raise StackException, 'Branch "%s" not initialised' % self.__name
 360         f = file(self.__applied_file)
 361         names = [line.strip() for line in f.readlines()]
 362         f.close()
 363         return names
 364
 365     def get_unapplied(self):
 366         if not os.path.isfile(self.__unapplied_file):
 367             raise StackException, 'Branch "%s" not initialised' % self.__name
 368         f = file(self.__unapplied_file)
 369         names = [line.strip() for line in f.readlines()]
 370         f.close()
 371         return names
 372
 373     def get_hidden(self):
 374         if not os.path.isfile(self.__hidden_file):
 375             return []
 376         f = file(self.__hidden_file)
 377         names = [line.strip() for line in f.readlines()]
 378         f.close()
 379         return names
 380
 381     def get_base_file(self):
 382         self.__begin_stack_check()
 383         return self.__base_file
 384
 385     def get_base(self):
 386         return read_string(self.get_base_file())
 387
 388     def get_head(self):
 389         """Return the head of the branch
 390         """
 391         crt = self.get_current_patch()
 392         if crt:
 393             return crt.get_top()
 394         else:
 395             return self.get_base()
 396
 397     def get_protected(self):
 398         return os.path.isfile(os.path.join(self._dir(), 'protected'))
 399
 400     def protect(self):
 401         protect_file = os.path.join(self._dir(), 'protected')
 402         if not os.path.isfile(protect_file):
 403             create_empty_file(protect_file)
 404
 405     def unprotect(self):
 406         protect_file = os.path.join(self._dir(), 'protected')
 407         if os.path.isfile(protect_file):
 408             os.remove(protect_file)
 409
 410     def get_description(self):
 411         return self._get_field('description') or ''
 412
 413     def set_description(self, line):
 414         self._set_field('description', line)
 415
 416     def get_parent_remote(self):
 417         value = config.get('branch.%s.remote' % self.__name)
 418         if value:
 419             return value
 420         elif 'origin' in git.remotes_list():
 421             print 'Notice: no parent remote declared for stack "%s", ' \
 422                   'defaulting to "origin". Consider setting "branch.%s.remote" ' \
 423                   'and "branch.%s.merge" with "git repo-config".' \
 424                   % (self.__name, self.__name, self.__name)
 425             return 'origin'
 426         else:
 427             raise StackException, 'Cannot find a parent remote for "%s"' % self.__name
 428
 429     def __set_parent_remote(self, remote):
 430         value = config.set('branch.%s.remote' % self.__name, remote)
 431
 432     def get_parent_branch(self):
 433         value = config.get('branch.%s.stgit.parentbranch' % self.__name)
 434         if value:
 435             return value
 436         elif git.rev_parse('heads/origin'):
 437             print 'Notice: no parent branch declared for stack "%s", ' \
 438                   'defaulting to "heads/origin". Consider setting ' \
 439                   '"branch.%s.stgit.parentbranch" with "git repo-config".' \
 440                   % (self.__name, self.__name)
 441             return 'heads/origin'
 442         else:
 443             raise StackException, 'Cannot find a parent branch for "%s"' % self.__name
 444
 445     def __set_parent_branch(self, name):
 446         if config.get('branch.%s.remote' % self.__name):
 447             # Never set merge if remote is not set to avoid
 448             # possibly-erroneous lookups into 'origin'
 449             config.set('branch.%s.merge' % self.__name, name)
 450         config.set('branch.%s.stgit.parentbranch' % self.__name, name)
 451
 452     def set_parent(self, remote, localbranch):
 453         # policy: record local branches as remote='.'
 454         recordremote = remote or '.'
 455         if localbranch:
 456             self.__set_parent_remote(recordremote)
 457             self.__set_parent_branch(localbranch)
 458         # We'll enforce this later
 459 #         else:
 460 #             raise StackException, 'Parent branch (%s) should be specified for %s' % localbranch, self.__name
 461
 462     def __patch_is_current(self, patch):
 463         return patch.get_name() == self.get_current()
 464
 465     def patch_applied(self, name):
 466         """Return true if the patch exists in the applied list
 467         """
 468         return name in self.get_applied()
 469
 470     def patch_unapplied(self, name):
 471         """Return true if the patch exists in the unapplied list
 472         """
 473         return name in self.get_unapplied()
 474
 475     def patch_hidden(self, name):
 476         """Return true if the patch is hidden.
 477         """
 478         return name in self.get_hidden()
 479
 480     def patch_exists(self, name):
 481         """Return true if there is a patch with the given name, false
 482         otherwise."""
 483         return self.patch_applied(name) or self.patch_unapplied(name)
 484
 485     def __begin_stack_check(self):
 486         """Save the current HEAD into .git/refs/heads/base if the stack
 487         is empty
 488         """
 489         if len(self.get_applied()) == 0:
 490             head = git.get_head()
 491             write_string(self.__base_file, head)
 492
 493     def __end_stack_check(self):
 494         """Remove .git/refs/heads/base if the stack is empty.
 495         This warning should never happen
 496         """
 497         if len(self.get_applied()) == 0 \
 498            and read_string(self.__base_file) != git.get_head():
 499             print 'Warning: stack empty but the HEAD and base are different'
 500
 501     def head_top_equal(self):
 502         """Return true if the head and the top are the same
 503         """
 504         crt = self.get_current_patch()
 505         if not crt:
 506             # we don't care, no patches applied
 507             return True
 508         return git.get_head() == crt.get_top()
 509
 510     def is_initialised(self):
 511         """Checks if series is already initialised
 512         """
 513         return os.path.isdir(self.__patch_dir)
 514
 515     def init(self, create_at=False, parent_remote=None, parent_branch=None):
 516         """Initialises the stgit series
 517         """
 518         if os.path.exists(self.__patch_dir):
 519             raise StackException, self.__patch_dir + ' already exists'
 520         if os.path.exists(self.__refs_dir):
 521             raise StackException, self.__refs_dir + ' already exists'
 522         if os.path.exists(self.__base_file):
 523             raise StackException, self.__base_file + ' already exists'
 524
 525         if (create_at!=False):
 526             git.create_branch(self.__name, create_at)
 527
 528         os.makedirs(self.__patch_dir)
 529
 530         self.set_parent(parent_remote, parent_branch)
 531
 532         create_dirs(os.path.join(self.__base_dir, 'refs', 'bases'))
 533
 534         self.create_empty_field('applied')
 535         self.create_empty_field('unapplied')
 536         self.create_empty_field('description')
 537         os.makedirs(os.path.join(self._dir(), 'patches'))
 538         os.makedirs(self.__refs_dir)
 539         self.__begin_stack_check()
 540         self._set_field('orig-base', git.get_head())
 541
 542     def convert(self):
 543         """Either convert to use a separate patch directory, or
 544         unconvert to place the patches in the same directory with
 545         series control files
 546         """
 547         if self.__patch_dir == self._dir():
 548             print 'Converting old-style to new-style...',
 549             sys.stdout.flush()
 550
 551             self.__patch_dir = os.path.join(self._dir(), 'patches')
 552             os.makedirs(self.__patch_dir)
 553
 554             for p in self.get_applied() + self.get_unapplied():
 555                 src = os.path.join(self._dir(), p)
 556                 dest = os.path.join(self.__patch_dir, p)
 557                 os.rename(src, dest)
 558
 559             print 'done'
 560
 561         else:
 562             print 'Converting new-style to old-style...',
 563             sys.stdout.flush()
 564
 565             for p in self.get_applied() + self.get_unapplied():
 566                 src = os.path.join(self.__patch_dir, p)
 567                 dest = os.path.join(self._dir(), p)
 568                 os.rename(src, dest)
 569
 570             if not os.listdir(self.__patch_dir):
 571                 os.rmdir(self.__patch_dir)
 572                 print 'done'
 573             else:
 574                 print 'Patch directory %s is not empty.' % self.__name
 575
 576             self.__patch_dir = self._dir()
 577
 578     def rename(self, to_name):
 579         """Renames a series
 580         """
 581         to_stack = Series(to_name)
 582
 583         if to_stack.is_initialised():
 584             raise StackException, '"%s" already exists' % to_stack.get_branch()
 585         if os.path.exists(to_stack.__base_file):
 586             os.remove(to_stack.__base_file)
 587
 588         git.rename_branch(self.__name, to_name)
 589
 590         if os.path.isdir(self._dir()):
 591             rename(os.path.join(self.__base_dir, 'patches'),
 592                    self.__name, to_stack.__name)
 593         if os.path.exists(self.__base_file):
 594             rename(os.path.join(self.__base_dir, 'refs', 'bases'),
 595                    self.__name, to_stack.__name)
 596         if os.path.exists(self.__refs_dir):
 597             rename(os.path.join(self.__base_dir, 'refs', 'patches'),
 598                    self.__name, to_stack.__name)
 599
 600         # Rename the config section
 601         config.rename_section("branch.%s" % self.__name,
 602                               "branch.%s" % to_name)
 603
 604         self.__init__(to_name)
 605
 606     def clone(self, target_series):
 607         """Clones a series
 608         """
 609         try:
 610             # allow cloning of branches not under StGIT control
 611             base = self.get_base()
 612         except:
 613             base = git.get_head()
 614         Series(target_series).init(create_at = base)
 615         new_series = Series(target_series)
 616
 617         # generate an artificial description file
 618         new_series.set_description('clone of "%s"' % self.__name)
 619
 620         # clone self's entire series as unapplied patches
 621         try:
 622             # allow cloning of branches not under StGIT control
 623             applied = self.get_applied()
 624             unapplied = self.get_unapplied()
 625             patches = applied + unapplied
 626             patches.reverse()
 627         except:
 628             patches = applied = unapplied = []
 629         for p in patches:
 630             patch = self.get_patch(p)
 631             new_series.new_patch(p, message = patch.get_description(),
 632                                  can_edit = False, unapplied = True,
 633                                  bottom = patch.get_bottom(),
 634                                  top = patch.get_top(),
 635                                  author_name = patch.get_authname(),
 636                                  author_email = patch.get_authemail(),
 637                                  author_date = patch.get_authdate())
 638
 639         # fast forward the cloned series to self's top
 640         new_series.forward_patches(applied)
 641
 642         # Clone remote and merge settings
 643         value = config.get('branch.%s.remote' % self.__name)
 644         if value:
 645             config.set('branch.%s.remote' % target_series, value)
 646
 647         value = config.get('branch.%s.merge' % self.__name)
 648         if value:
 649             config.set('branch.%s.merge' % target_series, value)
 650
 651     def delete(self, force = False):
 652         """Deletes an stgit series
 653         """
 654         if self.is_initialised():
 655             patches = self.get_unapplied() + self.get_applied()
 656             if not force and patches:
 657                 raise StackException, \
 658                       'Cannot delete: the series still contains patches'
 659             for p in patches:
 660                 Patch(p, self.__patch_dir, self.__refs_dir).delete()
 661
 662             # remove the trash directory
 663             for fname in os.listdir(self.__trash_dir):
 664                 os.remove(fname)
 665             os.rmdir(self.__trash_dir)
 666
 667             # FIXME: find a way to get rid of those manual removals
 668             # (move functionality to StgitObject ?)
 669             if os.path.exists(self.__applied_file):
 670                 os.remove(self.__applied_file)
 671             if os.path.exists(self.__unapplied_file):
 672                 os.remove(self.__unapplied_file)
 673             if os.path.exists(self.__hidden_file):
 674                 os.remove(self.__hidden_file)
 675             if os.path.exists(self.__current_file):
 676                 os.remove(self.__current_file)
 677             if os.path.exists(self.__descr_file):
 678                 os.remove(self.__descr_file)
 679             if not os.listdir(self.__patch_dir):
 680                 os.rmdir(self.__patch_dir)
 681             else:
 682                 print 'Patch directory %s is not empty.' % self.__name
 683             if not os.listdir(self._dir()):
 684                 remove_dirs(os.path.join(self.__base_dir, 'patches'),
 685                             self.__name)
 686             else:
 687                 print 'Series directory %s is not empty.' % self.__name
 688             if not os.listdir(self.__refs_dir):
 689                 remove_dirs(os.path.join(self.__base_dir, 'refs', 'patches'),
 690                             self.__name)
 691             else:
 692                 print 'Refs directory %s is not empty.' % self.__refs_dir
 693
 694         if os.path.exists(self.__base_file):
 695             remove_file_and_dirs(
 696                 os.path.join(self.__base_dir, 'refs', 'bases'), self.__name)
 697
 698     def refresh_patch(self, files = None, message = None, edit = False,
 699                       show_patch = False,
 700                       cache_update = True,
 701                       author_name = None, author_email = None,
 702                       author_date = None,
 703                       committer_name = None, committer_email = None,
 704                       backup = False, sign_str = None, log = 'refresh'):
 705         """Generates a new commit for the given patch
 706         """
 707         name = self.get_current()
 708         if not name:
 709             raise StackException, 'No patches applied'
 710
 711         patch = Patch(name, self.__patch_dir, self.__refs_dir)
 712
 713         descr = patch.get_description()
 714         if not (message or descr):
 715             edit = True
 716             descr = ''
 717         elif message:
 718             descr = message
 719
 720         if not message and edit:
 721             descr = edit_file(self, descr.rstrip(), \
 722                               'Please edit the description for patch "%s" ' \
 723                               'above.' % name, show_patch)
 724
 725         if not author_name:
 726             author_name = patch.get_authname()
 727         if not author_email:
 728             author_email = patch.get_authemail()
 729         if not author_date:
 730             author_date = patch.get_authdate()
 731         if not committer_name:
 732             committer_name = patch.get_commname()
 733         if not committer_email:
 734             committer_email = patch.get_commemail()
 735
 736         if sign_str:
 737             descr = '%s\n%s: %s <%s>\n' % (descr.rstrip(), sign_str,
 738                                            committer_name, committer_email)
 739
 740         bottom = patch.get_bottom()
 741
 742         commit_id = git.commit(files = files,
 743                                message = descr, parents = [bottom],
 744                                cache_update = cache_update,
 745                                allowempty = True,
 746                                author_name = author_name,
 747                                author_email = author_email,
 748                                author_date = author_date,
 749                                committer_name = committer_name,
 750                                committer_email = committer_email)
 751
 752         patch.set_bottom(bottom, backup = backup)
 753         patch.set_top(commit_id, backup = backup)
 754         patch.set_description(descr)
 755         patch.set_authname(author_name)
 756         patch.set_authemail(author_email)
 757         patch.set_authdate(author_date)
 758         patch.set_commname(committer_name)
 759         patch.set_commemail(committer_email)
 760
 761         if log:
 762             self.log_patch(patch, log)
 763
 764         return commit_id
 765
 766     def undo_refresh(self):
 767         """Undo the patch boundaries changes caused by 'refresh'
 768         """
 769         name = self.get_current()
 770         assert(name)
 771
 772         patch = Patch(name, self.__patch_dir, self.__refs_dir)
 773         old_bottom = patch.get_old_bottom()
 774         old_top = patch.get_old_top()
 775
 776         # the bottom of the patch is not changed by refresh. If the
 777         # old_bottom is different, there wasn't any previous 'refresh'
 778         # command (probably only a 'push')
 779         if old_bottom != patch.get_bottom() or old_top == patch.get_top():
 780             raise StackException, 'No undo information available'
 781
 782         git.reset(tree_id = old_top, check_out = False)
 783         if patch.restore_old_boundaries():
 784             self.log_patch(patch, 'undo')
 785
 786     def new_patch(self, name, message = None, can_edit = True,
 787                   unapplied = False, show_patch = False,
 788                   top = None, bottom = None,
 789                   author_name = None, author_email = None, author_date = None,
 790                   committer_name = None, committer_email = None,
 791                   before_existing = False, refresh = True):
 792         """Creates a new patch
 793         """
 794         self.__patch_name_valid(name)
 795
 796         if self.patch_applied(name) or self.patch_unapplied(name):
 797             raise StackException, 'Patch "%s" already exists' % name
 798
 799         if not message and can_edit:
 800             descr = edit_file(self, None, \
 801                               'Please enter the description for patch "%s" ' \
 802                               'above.' % name, show_patch)
 803         else:
 804             descr = message
 805
 806         head = git.get_head()
 807
 808         self.__begin_stack_check()
 809
 810         patch = Patch(name, self.__patch_dir, self.__refs_dir)
 811         patch.create()
 812
 813         if bottom:
 814             patch.set_bottom(bottom)
 815         else:
 816             patch.set_bottom(head)
 817         if top:
 818             patch.set_top(top)
 819         else:
 820             patch.set_top(head)
 821
 822         patch.set_description(descr)
 823         patch.set_authname(author_name)
 824         patch.set_authemail(author_email)
 825         patch.set_authdate(author_date)
 826         patch.set_commname(committer_name)
 827         patch.set_commemail(committer_email)
 828
 829         if unapplied:
 830             self.log_patch(patch, 'new')
 831
 832             patches = [patch.get_name()] + self.get_unapplied()
 833
 834             f = file(self.__unapplied_file, 'w+')
 835             f.writelines([line + '\n' for line in patches])
 836             f.close()
 837         elif before_existing:
 838             self.log_patch(patch, 'new')
 839
 840             insert_string(self.__applied_file, patch.get_name())
 841             if not self.get_current():
 842                 self.__set_current(name)
 843         else:
 844             append_string(self.__applied_file, patch.get_name())
 845             self.__set_current(name)
 846             if refresh:
 847                 self.refresh_patch(cache_update = False, log = 'new')
 848
 849     def delete_patch(self, name):
 850         """Deletes a patch
 851         """
 852         self.__patch_name_valid(name)
 853         patch = Patch(name, self.__patch_dir, self.__refs_dir)
 854
 855         if self.__patch_is_current(patch):
 856             self.pop_patch(name)
 857         elif self.patch_applied(name):
 858             raise StackException, 'Cannot remove an applied patch, "%s", ' \
 859                   'which is not current' % name
 860         elif not name in self.get_unapplied():
 861             raise StackException, 'Unknown patch "%s"' % name
 862
 863         # save the commit id to a trash file
 864         write_string(os.path.join(self.__trash_dir, name), patch.get_top())
 865
 866         patch.delete()
 867
 868         unapplied = self.get_unapplied()
 869         unapplied.remove(name)
 870         f = file(self.__unapplied_file, 'w+')
 871         f.writelines([line + '\n' for line in unapplied])
 872         f.close()
 873
 874         if self.patch_hidden(name):
 875             self.unhide_patch(name)
 876
 877         self.__begin_stack_check()
 878
 879     def forward_patches(self, names):
 880         """Try to fast-forward an array of patches.
 881
 882         On return, patches in names[0:returned_value] have been pushed on the
 883         stack. Apply the rest with push_patch
 884         """
 885         unapplied = self.get_unapplied()
 886         self.__begin_stack_check()
 887
 888         forwarded = 0
 889         top = git.get_head()
 890
 891         for name in names:
 892             assert(name in unapplied)
 893
 894             patch = Patch(name, self.__patch_dir, self.__refs_dir)
 895
 896             head = top
 897             bottom = patch.get_bottom()
 898             top = patch.get_top()
 899
 900             # top != bottom always since we have a commit for each patch
 901             if head == bottom:
 902                 # reset the backup information. No logging since the
 903                 # patch hasn't changed
 904                 patch.set_bottom(head, backup = True)
 905                 patch.set_top(top, backup = True)
 906
 907             else:
 908                 head_tree = git.get_commit(head).get_tree()
 909                 bottom_tree = git.get_commit(bottom).get_tree()
 910                 if head_tree == bottom_tree:
 911                     # We must just reparent this patch and create a new commit
 912                     # for it
 913                     descr = patch.get_description()
 914                     author_name = patch.get_authname()
 915                     author_email = patch.get_authemail()
 916                     author_date = patch.get_authdate()
 917                     committer_name = patch.get_commname()
 918                     committer_email = patch.get_commemail()
 919
 920                     top_tree = git.get_commit(top).get_tree()
 921
 922                     top = git.commit(message = descr, parents = [head],
 923                                      cache_update = False,
 924                                      tree_id = top_tree,
 925                                      allowempty = True,
 926                                      author_name = author_name,
 927                                      author_email = author_email,
 928                                      author_date = author_date,
 929                                      committer_name = committer_name,
 930                                      committer_email = committer_email)
 931
 932                     patch.set_bottom(head, backup = True)
 933                     patch.set_top(top, backup = True)
 934
 935                     self.log_patch(patch, 'push(f)')
 936                 else:
 937                     top = head
 938                     # stop the fast-forwarding, must do a real merge
 939                     break
 940
 941             forwarded+=1
 942             unapplied.remove(name)
 943
 944         if forwarded == 0:
 945             return 0
 946
 947         git.switch(top)
 948
 949         append_strings(self.__applied_file, names[0:forwarded])
 950
 951         f = file(self.__unapplied_file, 'w+')
 952         f.writelines([line + '\n' for line in unapplied])
 953         f.close()
 954
 955         self.__set_current(name)
 956
 957         return forwarded
 958
 959     def merged_patches(self, names):
 960         """Test which patches were merged upstream by reverse-applying
 961         them in reverse order. The function returns the list of
 962         patches detected to have been applied. The state of the tree
 963         is restored to the original one
 964         """
 965         patches = [Patch(name, self.__patch_dir, self.__refs_dir)
 966                    for name in names]
 967         patches.reverse()
 968
 969         merged = []
 970         for p in patches:
 971             if git.apply_diff(p.get_top(), p.get_bottom()):
 972                 merged.append(p.get_name())
 973         merged.reverse()
 974
 975         git.reset()
 976
 977         return merged
 978
 979     def push_patch(self, name, empty = False):
 980         """Pushes a patch on the stack
 981         """
 982         unapplied = self.get_unapplied()
 983         assert(name in unapplied)
 984
 985         self.__begin_stack_check()
 986
 987         patch = Patch(name, self.__patch_dir, self.__refs_dir)
 988
 989         head = git.get_head()
 990         bottom = patch.get_bottom()
 991         top = patch.get_top()
 992
 993         ex = None
 994         modified = False
 995
 996         # top != bottom always since we have a commit for each patch
 997         if empty:
 998             # just make an empty patch (top = bottom = HEAD). This
 999             # option is useful to allow undoing already merged
1000             # patches. The top is updated by refresh_patch since we
1001             # need an empty commit
1002             patch.set_bottom(head, backup = True)
1003             patch.set_top(head, backup = True)
1004             modified = True
1005         elif head == bottom:
1006             # reset the backup information. No need for logging
1007             patch.set_bottom(bottom, backup = True)
1008             patch.set_top(top, backup = True)
1009
1010             git.switch(top)
1011         else:
1012             # new patch needs to be refreshed.
1013             # The current patch is empty after merge.
1014             patch.set_bottom(head, backup = True)
1015             patch.set_top(head, backup = True)
1016
1017             # Try the fast applying first. If this fails, fall back to the
1018             # three-way merge
1019             if not git.apply_diff(bottom, top):
1020                 # if git.apply_diff() fails, the patch requires a diff3
1021                 # merge and can be reported as modified
1022                 modified = True
1023
1024                 # merge can fail but the patch needs to be pushed
1025                 try:
1026                     git.merge(bottom, head, top, recursive = True)
1027                 except git.GitException, ex:
1028                     print >> sys.stderr, \
1029                           'The merge failed during "push". ' \
1030                           'Use "refresh" after fixing the conflicts'
1031
1032         append_string(self.__applied_file, name)
1033
1034         unapplied.remove(name)
1035         f = file(self.__unapplied_file, 'w+')
1036         f.writelines([line + '\n' for line in unapplied])
1037         f.close()
1038
1039         self.__set_current(name)
1040
1041         # head == bottom case doesn't need to refresh the patch
1042         if empty or head != bottom:
1043             if not ex:
1044                 # if the merge was OK and no conflicts, just refresh the patch
1045                 # The GIT cache was already updated by the merge operation
1046                 if modified:
1047                     log = 'push(m)'
1048                 else:
1049                     log = 'push'
1050                 self.refresh_patch(cache_update = False, log = log)
1051             else:
1052                 # we store the correctly merged files only for
1053                 # tracking the conflict history. Note that the
1054                 # git.merge() operations should always leave the index
1055                 # in a valid state (i.e. only stage 0 files)
1056                 self.refresh_patch(cache_update = False, log = 'push(c)')
1057                 raise StackException, str(ex)
1058
1059         return modified
1060
1061     def undo_push(self):
1062         name = self.get_current()
1063         assert(name)
1064
1065         patch = Patch(name, self.__patch_dir, self.__refs_dir)
1066         old_bottom = patch.get_old_bottom()
1067         old_top = patch.get_old_top()
1068
1069         # the top of the patch is changed by a push operation only
1070         # together with the bottom (otherwise the top was probably
1071         # modified by 'refresh'). If they are both unchanged, there
1072         # was a fast forward
1073         if old_bottom == patch.get_bottom() and old_top != patch.get_top():
1074             raise StackException, 'No undo information available'
1075
1076         git.reset()
1077         self.pop_patch(name)
1078         ret = patch.restore_old_boundaries()
1079         if ret:
1080             self.log_patch(patch, 'undo')
1081
1082         return ret
1083
1084     def pop_patch(self, name, keep = False):
1085         """Pops the top patch from the stack
1086         """
1087         applied = self.get_applied()
1088         applied.reverse()
1089         assert(name in applied)
1090
1091         patch = Patch(name, self.__patch_dir, self.__refs_dir)
1092
1093         # only keep the local changes
1094         if keep and not git.apply_diff(git.get_head(), patch.get_bottom()):
1095             raise StackException, \
1096                   'Failed to pop patches while preserving the local changes'
1097
1098         git.switch(patch.get_bottom(), keep)
1099
1100         # save the new applied list
1101         idx = applied.index(name) + 1
1102
1103         popped = applied[:idx]
1104         popped.reverse()
1105         unapplied = popped + self.get_unapplied()
1106
1107         f = file(self.__unapplied_file, 'w+')
1108         f.writelines([line + '\n' for line in unapplied])
1109         f.close()
1110
1111         del applied[:idx]
1112         applied.reverse()
1113
1114         f = file(self.__applied_file, 'w+')
1115         f.writelines([line + '\n' for line in applied])
1116         f.close()
1117
1118         if applied == []:
1119             self.__set_current(None)
1120         else:
1121             self.__set_current(applied[-1])
1122
1123         self.__end_stack_check()
1124
1125     def empty_patch(self, name):
1126         """Returns True if the patch is empty
1127         """
1128         self.__patch_name_valid(name)
1129         patch = Patch(name, self.__patch_dir, self.__refs_dir)
1130         bottom = patch.get_bottom()
1131         top = patch.get_top()
1132
1133         if bottom == top:
1134             return True
1135         elif git.get_commit(top).get_tree() \
1136                  == git.get_commit(bottom).get_tree():
1137             return True
1138
1139         return False
1140
1141     def rename_patch(self, oldname, newname):
1142         self.__patch_name_valid(newname)
1143
1144         applied = self.get_applied()
1145         unapplied = self.get_unapplied()
1146
1147         if oldname == newname:
1148             raise StackException, '"To" name and "from" name are the same'
1149
1150         if newname in applied or newname in unapplied:
1151             raise StackException, 'Patch "%s" already exists' % newname
1152
1153         if self.patch_hidden(oldname):
1154             self.unhide_patch(oldname)
1155             self.hide_patch(newname)
1156
1157         if oldname in unapplied:
1158             Patch(oldname, self.__patch_dir, self.__refs_dir).rename(newname)
1159             unapplied[unapplied.index(oldname)] = newname
1160
1161             f = file(self.__unapplied_file, 'w+')
1162             f.writelines([line + '\n' for line in unapplied])
1163             f.close()
1164         elif oldname in applied:
1165             Patch(oldname, self.__patch_dir, self.__refs_dir).rename(newname)
1166             if oldname == self.get_current():
1167                 self.__set_current(newname)
1168
1169             applied[applied.index(oldname)] = newname
1170
1171             f = file(self.__applied_file, 'w+')
1172             f.writelines([line + '\n' for line in applied])
1173             f.close()
1174         else:
1175             raise StackException, 'Unknown patch "%s"' % oldname
1176
1177     def log_patch(self, patch, message):
1178         """Generate a log commit for a patch
1179         """
1180         top = git.get_commit(patch.get_top())
1181         msg = '%s\t%s' % (message, top.get_id_hash())
1182
1183         old_log = patch.get_log()
1184         if old_log:
1185             parents = [old_log]
1186         else:
1187             parents = []
1188
1189         log = git.commit(message = msg, parents = parents,
1190                          cache_update = False, tree_id = top.get_tree(),
1191                          allowempty = True)
1192         patch.set_log(log)
1193
1194     def hide_patch(self, name):
1195         """Add the patch to the hidden list.
1196         """
1197         if not self.patch_exists(name):
1198             raise StackException, 'Unknown patch "%s"' % name
1199         elif self.patch_hidden(name):
1200             raise StackException, 'Patch "%s" already hidden' % name
1201
1202         append_string(self.__hidden_file, name)
1203
1204     def unhide_patch(self, name):
1205         """Add the patch to the hidden list.
1206         """
1207         if not self.patch_exists(name):
1208             raise StackException, 'Unknown patch "%s"' % name
1209         hidden = self.get_hidden()
1210         if not name in hidden:
1211             raise StackException, 'Patch "%s" not hidden' % name
1212
1213         hidden.remove(name)
1214
1215         f = file(self.__hidden_file, 'w+')
1216         f.writelines([line + '\n' for line in hidden])
1217         f.close()