ugit/models.py

   1 import os
   2 import sys
   3 import re
   4 import time
   5 import subprocess
   6 from cStringIO import StringIO
   7
   8 # GitPython http://gitorious.org/projects/git-python
   9 import git
  10
  11 from ugit import utils
  12 from ugit import model
  13
  14 #+-------------------------------------------------------------------------
  15 #+ A regex for matching the output of git(log|rev-list) --pretty=oneline
  16 REV_LIST_REGEX = re.compile('([0-9a-f]+)\W(.*)')
  17
  18 #+-------------------------------------------------------------------------
  19 # List of functions available directly through model.command_name()
  20 GIT_COMMANDS = """
  21         am annotate apply archive archive_recursive
  22         bisect blame branch bundle
  23         checkout checkout_index cherry cherry_pick citool
  24         clean commit config count_objects
  25         describe diff
  26         fast_export fetch filter_branch format_patch fsck
  27         gc get_tar_commit_id grep gui
  28         hard_repack imap_send init instaweb
  29         log lost_found ls_files ls_remote ls_tree
  30         merge mergetool mv name_rev pull push
  31         read_tree rebase relink remote repack
  32         request_pull reset revert rev_list rm
  33         send_email shortlog show show_branch
  34         show_ref stash status submodule svn
  35         tag var verify_pack whatchanged
  36 """.split()
  37
  38 class Model(model.Model):
  39         """Provides a friendly wrapper for doing commit git operations."""
  40
  41         def init(self):
  42                 """Reads git repository settings and sets several methods
  43                 so that they refer to the git module.  This object is
  44                 encapsulates ugit's interaction with git."""
  45
  46                 # chdir to the root of the git tree.
  47                 # This keeps paths relative.
  48                 self.git = git.Git()
  49                 os.chdir( self.git.git_dir )
  50
  51                 # Read git config
  52                 self.__init_config_data()
  53
  54                 # Import all git commands from git.py
  55                 for cmd in GIT_COMMANDS:
  56                         setattr(self, cmd, getattr(self.git, cmd))
  57
  58                 self.create(
  59                         #####################################################
  60                         # Used in various places
  61                         currentbranch = '',
  62                         remotes = [],
  63                         remotename = '',
  64                         local_branch = '',
  65                         remote_branch = '',
  66                         search_text = '',
  67                         git_version = self.git.version(),
  68
  69                         #####################################################
  70                         # Used primarily by the main UI
  71                         project = os.path.basename(os.getcwd()),
  72                         commitmsg = '',
  73                         modified = [],
  74                         staged = [],
  75                         unstaged = [],
  76                         untracked = [],
  77                         window_geom = utils.parse_geom(
  78                                         self.get_global_ugit_geometry()),
  79
  80                         #####################################################
  81                         # Used by the create branch dialog
  82                         revision = '',
  83                         local_branches = [],
  84                         remote_branches = [],
  85                         tags = [],
  86
  87                         #####################################################
  88                         # Used by the commit/repo browser
  89                         directory = '',
  90                         revisions = [],
  91                         summaries = [],
  92
  93                         # These are parallel lists
  94                         types = [],
  95                         sha1s = [],
  96                         names = [],
  97
  98                         # All items below here are re-calculated in
  99                         # init_browser_data()
 100                         directories = [],
 101                         directory_entries = {},
 102
 103                         # These are also parallel lists
 104                         subtree_types = [],
 105                         subtree_sha1s = [],
 106                         subtree_names = [],
 107                         )
 108
 109         def __init_config_data(self):
 110                 """Reads git config --list and creates parameters
 111                 for each setting."""
 112                 # These parameters are saved in .gitconfig,
 113                 # so ideally these should be as short as possible.
 114
 115                 # config items that are controllable globally
 116                 # and per-repository
 117                 self.__local_and_global_defaults = {
 118                         'user_name': '',
 119                         'user_email': '',
 120                         'merge_summary': False,
 121                         'merge_diffstat': True,
 122                         'merge_verbosity': 2,
 123                         'gui_diffcontext': 3,
 124                         'gui_pruneduringfetch': False,
 125                 }
 126                 # config items that are purely git config --global settings
 127                 self.__global_defaults = {
 128                         'ugit_geometry':'',
 129                         'ugit_fontui': '',
 130                         'ugit_fontui_size':12,
 131                         'ugit_fontdiff': '',
 132                         'ugit_fontdiff_size':12,
 133                         'ugit_historybrowser': 'gitk',
 134                         'ugit_savewindowsettings': False,
 135                         'ugit_saveatexit': False,
 136                 }
 137
 138                 local_dict = self.config_dict(local=True)
 139                 global_dict = self.config_dict(local=False)
 140
 141                 for k,v in local_dict.iteritems():
 142                         self.set_param('local_'+k, v)
 143                 for k,v in global_dict.iteritems():
 144                         self.set_param('global_'+k, v)
 145                         if k not in local_dict:
 146                                 local_dict[k]=v
 147                                 self.set_param('local_'+k, v)
 148
 149                 # Bootstrap the internal font*_size variables
 150                 for param in ('global_ugit_fontui', 'global_ugit_fontdiff'):
 151                         if hasattr(self, param):
 152                                 font = self.get_param(param)
 153                                 if font:
 154                                         size = int(font.split(',')[1])
 155                                         self.set_param(param+'_size', size)
 156                                         param = param[len('global_'):]
 157                                         global_dict[param] = font
 158                                         global_dict[param+'_size'] = size
 159
 160                 # Load defaults for all undefined items
 161                 local_and_global_defaults = self.__local_and_global_defaults
 162                 for k,v in local_and_global_defaults.iteritems():
 163                         if k not in local_dict:
 164                                 self.set_param('local_'+k, v)
 165                         if k not in global_dict:
 166                                 self.set_param('global_'+k, v)
 167
 168                 global_defaults = self.__global_defaults
 169                 for k,v in global_defaults.iteritems():
 170                         if k not in global_dict:
 171                                 self.set_param('global_'+k, v)
 172
 173                 # Load the diff context
 174                 self.diff_context = self.local_gui_diffcontext
 175
 176         def branch_list(self, remote=False):
 177                 branches = map(lambda x: x.lstrip('* '),
 178                                 self.git.branch(r=remote).splitlines())
 179                 if remote:
 180                         remotes = []
 181                         for branch in branches:
 182                                 if branch.endswith('/HEAD'):
 183                                         continue
 184                                 remotes.append(branch)
 185                         return remotes
 186                 return branches
 187
 188         def get_config_params(self):
 189                 params = []
 190                 params.extend(map(lambda x: 'local_' + x,
 191                                 self.__local_and_global_defaults.keys()))
 192                 params.extend(map(lambda x: 'global_' + x,
 193                                 self.__local_and_global_defaults.keys()))
 194                 params.extend(map(lambda x: 'global_' + x,
 195                                 self.__global_defaults.keys()))
 196                 return params
 197
 198         def save_config_param(self, param):
 199                 if param not in self.get_config_params():
 200                         return
 201                 value = self.get_param(param)
 202                 if param == 'local_gui_diffcontext':
 203                         self.diff_context = value
 204                 if param.startswith('local_'):
 205                         param = param[len('local_'):]
 206                         is_local = True
 207                 elif param.startswith('global_'):
 208                         param = param[len('global_'):]
 209                         is_local = False
 210                 else:
 211                         raise Exception("Invalid param '%s' passed to " % param
 212                                         + "save_config_param()")
 213                 param = param.replace('_','.') # model -> git
 214                 return self.config_set(param, value, local=is_local)
 215
 216         def init_browser_data(self):
 217                 '''This scans over self.(names, sha1s, types) to generate
 218                 directories, directory_entries, and subtree_*'''
 219
 220                 # Collect data for the model
 221                 if not self.get_currentbranch(): return
 222
 223                 self.subtree_types = []
 224                 self.subtree_sha1s = []
 225                 self.subtree_names = []
 226                 self.directories = []
 227                 self.directory_entries = {}
 228
 229                 # Lookup the tree info
 230                 tree_info = self.parse_ls_tree(self.get_currentbranch())
 231
 232                 self.set_types(map( lambda(x): x[1], tree_info ))
 233                 self.set_sha1s(map( lambda(x): x[2], tree_info ))
 234                 self.set_names(map( lambda(x): x[3], tree_info ))
 235
 236                 if self.directory: self.directories.append('..')
 237
 238                 dir_entries = self.directory_entries
 239                 dir_regex = re.compile('([^/]+)/')
 240                 dirs_seen = {}
 241                 subdirs_seen = {}
 242
 243                 for idx, name in enumerate(self.names):
 244
 245                         if not name.startswith(self.directory): continue
 246                         name = name[ len(self.directory): ]
 247
 248                         if name.count('/'):
 249                                 # This is a directory...
 250                                 match = dir_regex.match(name)
 251                                 if not match: continue
 252
 253                                 dirent = match.group(1) + '/'
 254                                 if dirent not in self.directory_entries:
 255                                         self.directory_entries[dirent] = []
 256
 257                                 if dirent not in dirs_seen:
 258                                         dirs_seen[dirent] = True
 259                                         self.directories.append(dirent)
 260
 261                                 entry = name.replace(dirent, '')
 262                                 entry_match = dir_regex.match(entry)
 263                                 if entry_match:
 264                                         subdir = entry_match.group(1) + '/'
 265                                         if subdir in subdirs_seen: continue
 266                                         subdirs_seen[subdir] = True
 267                                         dir_entries[dirent].append(subdir)
 268                                 else:
 269                                         dir_entries[dirent].append(entry)
 270                         else:
 271                                 self.subtree_types.append(self.types[idx])
 272                                 self.subtree_sha1s.append(self.sha1s[idx])
 273                                 self.subtree_names.append(name)
 274
 275         def add_or_remove(self, *to_process):
 276                 """Invokes 'git add' to index the filenames in to_process that exist
 277                 and 'git rm' for those that do not exist."""
 278
 279                 if not to_process:
 280                         return 'No files to add or remove.'
 281
 282                 to_add = []
 283                 to_remove = []
 284
 285                 for filename in to_process:
 286                         if os.path.exists(filename):
 287                                 to_add.append(filename)
 288
 289                 output = self.git.add(verbose=True, *to_add)
 290
 291                 if len(to_add) == len(to_process):
 292                         # to_process only contained unremoved files --
 293                         # short-circuit the removal checks
 294                         return output
 295
 296                 # Process files to remote
 297                 for filename in to_process:
 298                         if not os.path.exists(filename):
 299                                 to_remove.append(filename)
 300                 output + '\n\n' + self.git.rm(*to_remove)
 301
 302         def get_history_browser(self):
 303                 return self.global_ugit_historybrowser
 304
 305         def remember_gui_settings(self):
 306                 return self.global_ugit_savewindowsettings
 307
 308         def save_at_exit(self):
 309                 return self.global_ugit_saveatexit
 310
 311         def get_tree_node(self, idx):
 312                 return (self.get_types()[idx],
 313                         self.get_sha1s()[idx],
 314                         self.get_names()[idx] )
 315
 316         def get_subtree_node(self, idx):
 317                 return (self.get_subtree_types()[idx],
 318                         self.get_subtree_sha1s()[idx],
 319                         self.get_subtree_names()[idx] )
 320
 321         def get_all_branches(self):
 322                 return (self.get_local_branches() + self.get_remote_branches())
 323
 324         def set_remote(self, remote):
 325                 if not remote: return
 326                 self.set_param('remote', remote)
 327                 branches = utils.grep( '%s/\S+$' % remote,
 328                                 self.branch_list(remote=True), squash=False)
 329                 self.set_remote_branches(branches)
 330
 331         def add_signoff(self,*rest):
 332                 '''Adds a standard Signed-off by: tag to the end
 333                 of the current commit message.'''
 334
 335                 msg = self.get_commitmsg()
 336                 signoff =('\n\nSigned-off-by: %s <%s>\n' % (
 337                                 self.get_local_user_name(),
 338                                 self.get_local_user_email()))
 339
 340                 if signoff not in msg:
 341                         self.set_commitmsg(msg + signoff)
 342
 343         def apply_diff(self, filename):
 344                 return self.git.apply(filename, index=True, cached=True)
 345
 346         def load_commitmsg(self, path):
 347                 file = open(path, 'r')
 348                 contents = file.read()
 349                 file.close()
 350                 self.set_commitmsg(contents)
 351
 352         def get_prev_commitmsg(self,*rest):
 353                 '''Queries git for the latest commit message and sets it in
 354                 self.commitmsg.'''
 355                 commit_msg = []
 356                 commit_lines = self.git.show('HEAD').split('\n')
 357                 for idx, msg in enumerate(commit_lines):
 358                         if idx < 4: continue
 359                         msg = msg.lstrip()
 360                         if msg.startswith('diff --git'):
 361                                 commit_msg.pop()
 362                                 break
 363                         commit_msg.append(msg)
 364                 self.set_commitmsg('\n'.join(commit_msg).rstrip())
 365
 366         def update_status(self):
 367                 # This allows us to defer notification until the
 368                 # we finish processing data
 369                 notify_enabled = self.get_notify()
 370                 self.set_notify(False)
 371
 372                 # Reset the staged and unstaged model lists
 373                 # NOTE: the model's unstaged list is used to
 374                 # hold both modified and untracked files.
 375                 self.staged = []
 376                 self.modified = []
 377                 self.untracked = []
 378
 379                 # Read git status items
 380                 ( staged_items,
 381                   modified_items,
 382                   untracked_items ) = self.parse_status()
 383
 384                 # Gather items to be committed
 385                 for staged in staged_items:
 386                         if staged not in self.get_staged():
 387                                 self.add_staged(staged)
 388
 389                 # Gather unindexed items
 390                 for modified in modified_items:
 391                         if modified not in self.get_modified():
 392                                 self.add_modified(modified)
 393
 394                 # Gather untracked items
 395                 for untracked in untracked_items:
 396                         if untracked not in self.get_untracked():
 397                                 self.add_untracked(untracked)
 398
 399                 self.set_currentbranch(self.current_branch())
 400                 self.set_unstaged(self.get_modified() + self.get_untracked())
 401                 self.set_remotes(self.git.remote().splitlines())
 402                 self.set_remote_branches(self.branch_list(remote=True))
 403                 self.set_local_branches(self.branch_list(remote=False))
 404                 self.set_tags(self.git.tag().splitlines())
 405                 self.set_revision('')
 406                 self.set_local_branch('')
 407                 self.set_remote_branch('')
 408                 # Re-enable notifications and emit changes
 409                 self.set_notify(notify_enabled)
 410                 self.notify_observers('staged','unstaged')
 411
 412         def delete_branch(self, branch):
 413                 return self.git.branch(branch, D=True)
 414
 415         def get_revision_sha1(self, idx):
 416                 return self.get_revisions()[idx]
 417
 418         def apply_font_size(self, param, default):
 419                 old_font = self.get_param(param)
 420                 if not old_font:
 421                         old_font = default
 422
 423                 size = self.get_param(param+'_size')
 424                 props = old_font.split(',')
 425                 props[1] = str(size)
 426                 new_font = ','.join(props)
 427
 428                 self.set_param(param, new_font)
 429
 430         def read_font_size(self, param, new_font):
 431                 new_size = int(new_font.split(',')[1])
 432                 self.set_param(param, new_size)
 433
 434         def get_commit_diff(self, sha1):
 435                 commit = self.git.show(sha1)
 436                 first_newline = commit.index('\n')
 437                 if commit[first_newline+1:].startswith('Merge:'):
 438                         return (commit
 439                                 + '\n\n'
 440                                 + self.diff_helper(
 441                                         commit=sha1,
 442                                         cached=False,
 443                                         suppress_header=False,
 444                                         )
 445                                 )
 446                 else:
 447                         return commit
 448
 449         def get_diff_and_status(self, idx, staged=True):
 450                 if staged:
 451                         filename = self.get_staged()[idx]
 452                         if os.path.exists(filename):
 453                                 status = 'Staged for commit'
 454                         else:
 455                                 status = 'Staged for removal'
 456                         diff = self.diff_helper(
 457                                         filename=filename,
 458                                         cached=True,
 459                                         )
 460                 else:
 461                         filename = self.get_unstaged()[idx]
 462                         if os.path.isdir(filename):
 463                                 status = 'Untracked directory'
 464                                 diff = '\n'.join(os.listdir(filename))
 465                         elif filename in self.get_modified():
 466                                 status = 'Modified, not staged'
 467                                 diff = self.diff_helper(
 468                                                 filename=filename,
 469                                                 cached=False,
 470                                                 )
 471                         else:
 472                                 status = 'Untracked, not staged'
 473
 474                                 file_type = utils.run_cmd('file', '-b', filename)
 475                                 if 'binary' in file_type or 'data' in file_type:
 476                                         diff = utils.run_cmd('hexdump', '-C', filename)
 477                                 else:
 478                                         if os.path.exists(filename):
 479                                                 file = open(filename, 'r')
 480                                                 diff = file.read()
 481                                                 file.close()
 482                                         else:
 483                                                 diff = ''
 484                 return diff, status
 485
 486         def stage_modified(self):
 487                 output = self.git.add(self.get_modified())
 488                 self.update_status()
 489                 return output
 490
 491         def stage_untracked(self):
 492                 output = self.git.add(self.get_untracked())
 493                 self.update_status()
 494                 return output
 495
 496         def reset(self, *items):
 497                 output = self.git.reset('--', *items)
 498                 self.update_status()
 499                 return output
 500
 501         def unstage_all(self):
 502                 self.git.reset('--', *self.get_staged())
 503                 self.update_status()
 504
 505         def save_gui_settings(self):
 506                 self.config_set('ugit.geometry', utils.get_geom(), local=False)
 507
 508         def config_set(self, key=None, value=None, local=True):
 509                 if key and value is not None:
 510                         # git config category.key value
 511                         strval = str(value)
 512                         if type(value) is bool:
 513                                 # git uses "true" and "false"
 514                                 strval = strval.lower()
 515                         if local:
 516                                 argv = [ key, strval ]
 517                         else:
 518                                 argv = [ '--global', key, strval ]
 519                         return self.git.config(*argv)
 520                 else:
 521                         msg = "oops in config_set(key=%s,value=%s,local=%s"
 522                         raise Exception(msg % (key, value, local))
 523
 524         def config_dict(self, local=True):
 525                 """parses the lines from git config --list into a dictionary"""
 526
 527                 kwargs = {
 528                         'list': True,
 529                         'global': not local,
 530                 }
 531                 config_lines = self.git.config(**kwargs).splitlines()
 532                 newdict = {}
 533                 for line in config_lines:
 534                         k, v = line.split('=', 1)
 535                         k = k.replace('.','_') # git -> model
 536                         if v == 'true' or v == 'false':
 537                                 v = bool(eval(v.title()))
 538                         try:
 539                                 v = int(eval(v))
 540                         except:
 541                                 pass
 542                         newdict[k]=v
 543                 return newdict
 544
 545         def commit_with_msg(self, msg, amend=False):
 546                 """Creates a git commit."""
 547
 548                 if not msg.endswith('\n'):
 549                         msg += '\n'
 550                 # Sure, this is a potential "security risk," but if someone
 551                 # is trying to intercept/re-write commit messages on your system,
 552                 # then you probably have bigger problems to worry about.
 553                 tmpfile = self.get_tmp_filename()
 554
 555                 # Create the commit message file
 556                 file = open(tmpfile, 'w')
 557                 file.write(msg)
 558                 file.close()
 559
 560                 # Run 'git commit'
 561                 output = self.git.commit(F=tmpfile, amend=amend)
 562                 os.unlink(tmpfile)
 563
 564                 return ('git commit -F %s --amend %s\n\n%s'
 565                         % ( tmpfile, amend, output ))
 566
 567
 568         def diffindex(self):
 569                 return self.git.diff(
 570                                 unified=self.diff_context,
 571                                 stat=True,
 572                                 cached=True
 573                                 )
 574
 575         def get_tmp_filename(self):
 576                 # Allow TMPDIR/TMP with a fallback to /tmp
 577                 env = os.environ
 578                 basename = '.git.%s.%s' % ( os.getpid(), time.time() )
 579                 tmpdir = env.get('TMP', env.get('TMPDIR', '/tmp'))
 580                 return os.path.join( tmpdir, basename )
 581
 582         def log_helper(self, all=False):
 583                 """Returns a pair of parallel arrays listing the revision sha1's
 584                 and commit summaries."""
 585                 revs = []
 586                 summaries = []
 587                 regex = REV_LIST_REGEX
 588                 output = self.git.log(pretty='oneline', all=all)
 589                 for line in output.splitlines():
 590                         match = regex.match(line)
 591                         if match:
 592                                 revs.append(match.group(1))
 593                                 summaries.append(match.group(2))
 594                 return( revs, summaries )
 595
 596         def parse_rev_list(self, raw_revs):
 597                 revs = []
 598                 for line in raw_revs.splitlines():
 599                         match = REV_LIST_REGEX.match(line)
 600                         if match:
 601                                 rev_id = match.group(1)
 602                                 summary = match.group(2)
 603                                 revs.append((rev_id, summary,) )
 604                 return revs
 605
 606         def rev_list_range(self, start, end):
 607                 range = '%s..%s' % ( start, end )
 608                 raw_revs = self.git.rev_list(range, pretty='oneline')
 609                 return self.parse_rev_list(raw_revs)
 610
 611         def diff_helper(self,
 612                         commit=None,
 613                         filename=None,
 614                         color=False,
 615                         cached=True,
 616                         with_diff_header=False,
 617                         suppress_header=True,
 618                         reverse=False):
 619                 "Invokes git diff on a filepath."
 620
 621                 argv = []
 622                 if commit:
 623                         argv.append('%s^..%s' % (commit, commit))
 624
 625                 if filename:
 626                         argv.append('--')
 627                         if type(filename) is list:
 628                                 argv.extend(filename)
 629                         else:
 630                                 argv.append(filename)
 631
 632                 diff = self.git.diff(
 633                                 R=reverse,
 634                                 color=color,
 635                                 cached=cached,
 636                                 patch_with_raw=True,
 637                                 unified=self.diff_context,
 638                                 *argv
 639                         ).splitlines()
 640
 641                 output = StringIO()
 642                 start = False
 643                 del_tag = 'deleted file mode '
 644
 645                 headers = []
 646                 deleted = cached and not os.path.exists(filename)
 647                 for line in diff:
 648                         if not start and '@@ ' in line and ' @@' in line:
 649                                 start = True
 650                         if start or(deleted and del_tag in line):
 651                                 output.write(line + '\n')
 652                         else:
 653                                 if with_diff_header:
 654                                         headers.append(line)
 655                                 elif not suppress_header:
 656                                         output.write(line + '\n')
 657                 result = output.getvalue()
 658                 output.close()
 659                 if with_diff_header:
 660                         return('\n'.join(headers), result)
 661                 else:
 662                         return result
 663
 664         def git_repo_path(self, *subpaths):
 665                 paths = [ self.git.rev_parse(git_dir=True) ]
 666                 paths.extend(subpaths)
 667                 return os.path.realpath(os.path.join(*paths))
 668
 669         def get_merge_message_path(self):
 670                 for file in ('MERGE_MSG', 'SQUASH_MSG'):
 671                         path = self.git_repo_path(file)
 672                         if os.path.exists(path):
 673                                 return path
 674                 return None
 675
 676         def get_merge_message(self):
 677                 return self.git.fmt_merge_msg(
 678                                 '--file', self.git_repo_path('FETCH_HEAD')
 679                                 )
 680
 681         def abort_merge(self):
 682                 # Reset the worktree
 683                 output = self.git.read_tree("HEAD", reset=True, u=True, v=True)
 684                 # remove MERGE_HEAD
 685                 merge_head = self.git_repo_path('MERGE_HEAD')
 686                 if os.path.exists(merge_head):
 687                         os.unlink(merge_head)
 688                 # remove MERGE_MESSAGE, etc.
 689                 merge_msg_path = self.get_merge_message_path()
 690                 while merge_msg_path:
 691                         os.unlink(merge_msg_path)
 692                         merge_msg_path = self.get_merge_message_path()
 693
 694
 695         def parse_status(self):
 696                 """RETURNS: A tuple of staged, unstaged and untracked file lists.
 697                 """
 698                 def eval_path(path):
 699                         """handles quoted paths."""
 700                         if path.startswith('"') and path.endswith('"'):
 701                                 return eval(path)
 702                         else:
 703                                 return path
 704
 705                 MODIFIED_TAG = '# Changed but not updated:'
 706                 UNTRACKED_TAG = '# Untracked files:'
 707                 RGX_RENAMED = re.compile(
 708                                         '(#\trenamed:\s+)'
 709                                         '(.*?)\s->\s(.*)'
 710                                         )
 711                 RGX_MODIFIED = re.compile(
 712                                         '(#\tmodified:\s+'
 713                                         '|#\tnew file:\s+'
 714                                         '|#\tdeleted:\s+)'
 715                                         )
 716                 staged = []
 717                 unstaged = []
 718                 untracked = []
 719
 720                 STAGED_MODE = 0
 721                 UNSTAGED_MODE = 1
 722                 UNTRACKED_MODE = 2
 723
 724                 current_dest = staged
 725                 mode = STAGED_MODE
 726
 727                 for status_line in self.git.status().splitlines():
 728                         if status_line == MODIFIED_TAG:
 729                                 mode = UNSTAGED_MODE
 730                                 current_dest = unstaged
 731                                 continue
 732                         elif status_line == UNTRACKED_TAG:
 733                                 mode = UNTRACKED_MODE
 734                                 current_dest = untracked
 735                                 continue
 736                         # Staged/unstaged modified/renamed/deleted files
 737                         if mode is STAGED_MODE or mode is UNSTAGED_MODE:
 738                                 match = RGX_MODIFIED.match(status_line)
 739                                 if match:
 740                                         tag = match.group(0)
 741                                         filename = status_line.replace(tag, '')
 742                                         current_dest.append(eval_path(filename))
 743                                         continue
 744                                 match = RGX_RENAMED.match(status_line)
 745                                 if match:
 746                                         oldname = match.group(2)
 747                                         newname = match.group(3)
 748                                         current_dest.append(eval_path(oldname))
 749                                         current_dest.append(eval_path(newname))
 750                                         continue
 751                         # Untracked files
 752                         elif mode is UNTRACKED_MODE:
 753                                 if status_line.startswith('#\t'):
 754                                         current_dest.append(eval_path(status_line[2:]))
 755
 756                 return( staged, unstaged, untracked )
 757
 758         def reset_helper(self, *args, **kwargs):
 759                 return self.git.reset('--', *args, **kwargs)
 760
 761         def remote_url(self, name):
 762                 return self.git.config('remote.%s.url' % name, get=True)
 763
 764         def push_helper(self, remote, local_branch, remote_branch,
 765                         ffwd=True, tags=False):
 766                 if ffwd:
 767                         branch_arg = '%s:%s' % ( local_branch, remote_branch )
 768                 else:
 769                         branch_arg = '+%s:%s' % ( local_branch, remote_branch )
 770                 return self.git.push(remote, branch_arg,
 771                                 with_status=True, tags=tags
 772                                 )
 773
 774         def parse_ls_tree(self, rev):
 775                 """Returns a list of(mode, type, sha1, path) tuples."""
 776                 lines = self.git.ls_tree(rev, r=True).splitlines()
 777                 output = []
 778                 regex = re.compile('^(\d+)\W(\w+)\W(\w+)[ \t]+(.*)$')
 779                 for line in lines:
 780                         match = regex.match(line)
 781                         if match:
 782                                 mode = match.group(1)
 783                                 objtype = match.group(2)
 784                                 sha1 = match.group(3)
 785                                 filename = match.group(4)
 786                                 output.append((mode, objtype, sha1, filename,) )
 787                 return output
 788
 789         def format_patch_helper(self, to_export, revs, output='patches'):
 790                 """writes patches named by to_export to the output directory."""
 791
 792                 outlines = []
 793
 794                 cur_rev = to_export[0]
 795                 cur_master_idx = revs.index(cur_rev)
 796
 797                 patches_to_export = [ [cur_rev] ]
 798                 patchset_idx = 0
 799
 800                 for idx, rev in enumerate(to_export[1:]):
 801                         # Limit the search to the current neighborhood for efficiency
 802                         master_idx = revs[ cur_master_idx: ].index(rev)
 803                         master_idx += cur_master_idx
 804                         if master_idx == cur_master_idx + 1:
 805                                 patches_to_export[ patchset_idx ].append(rev)
 806                                 cur_master_idx += 1
 807                                 continue
 808                         else:
 809                                 patches_to_export.append([ rev ])
 810                                 cur_master_idx = master_idx
 811                                 patchset_idx += 1
 812
 813                 for patchset in patches_to_export:
 814                         revarg = '%s^..%s' % (patchset[0], patchset[-1])
 815                         outlines.append(
 816                                 self.git.format_patch(
 817                                         revarg,
 818                                         o=output,
 819                                         n=len(patchset) > 1,
 820                                         thread=True,
 821                                         patch_with_stat=True
 822                                         )
 823                                 )
 824
 825                 return '\n'.join(outlines)
 826
 827         def current_branch(self):
 828                 """Parses 'git branch' to find the current branch."""
 829                 branches = self.git.branch().splitlines()
 830                 for branch in branches:
 831                         if branch.startswith('* '):
 832                                 return branch.lstrip('* ')
 833                 return 'Detached HEAD'
 834
 835         def create_branch(self, name, base, track=False):
 836                 """Creates a branch starting from base.  Pass track=True
 837                 to create a remote tracking branch."""
 838                 return self.git.branch(name, base, track=track)
 839
 840         def cherry_pick_list(self, revs, **kwargs):
 841                 """Cherry-picks each revision into the current branch.
 842                 Returns a list of command output strings (1 per cherry pick)"""
 843                 if not revs:
 844                         return []
 845                 cherries = []
 846                 for rev in revs:
 847                         cherries.append(self.git.cherry_pick(rev, **kwargs))
 848                 return '\n'.join(cherries)