mdw@git.distorted.org.uk Git - stgit/blob - stgit/commands/sync.py

   1 __copyright__ = """
   2 Copyright (C) 2006, Catalin Marinas <catalin.marinas@gmail.com>
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License version 2 as
   6 published by the Free Software Foundation.
   7
   8 This program is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 GNU General Public License for more details.
  12
  13 You should have received a copy of the GNU General Public License
  14 along with this program; if not, write to the Free Software
  15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16 """
  17
  18 import sys, os
  19 from optparse import OptionParser, make_option
  20
  21 import stgit.commands.common
  22 from stgit.commands.common import *
  23 from stgit.utils import *
  24 from stgit.out import *
  25 from stgit import stack, git
  26
  27
  28 help = 'synchronise patches with a branch or a series'
  29 usage = """%prog [options] [<patch1>] [<patch2>] [<patch3>..<patch4>]
  30
  31 For each of the specified patches perform a three-way merge with the
  32 same patch in the specified branch or series. The command can be used
  33 for keeping patches on several branches in sync. Note that the
  34 operation may fail for some patches because of conflicts. The patches
  35 in the series must apply cleanly.
  36
  37 The sync operation can be reverted for individual patches with --undo."""
  38
  39 directory = DirectoryGotoToplevel()
  40 options = [make_option('-a', '--all',
  41                        help = 'synchronise all the applied patches',
  42                        action = 'store_true'),
  43            make_option('-B', '--ref-branch',
  44                        help = 'syncronise patches with BRANCH'),
  45            make_option('-s', '--series',
  46                        help = 'syncronise patches with SERIES'),
  47            make_option('--undo',
  48                        help = 'undo the synchronisation of the current patch',
  49                        action = 'store_true')]
  50
  51 def __check_all():
  52     check_local_changes()
  53     check_conflicts()
  54     check_head_top_equal(crt_series)
  55
  56 def __branch_merge_patch(remote_series, pname):
  57     """Merge a patch from a remote branch into the current tree.
  58     """
  59     patch = remote_series.get_patch(pname)
  60     git.merge(patch.get_bottom(), git.get_head(), patch.get_top())
  61
  62 def __series_merge_patch(base, patchdir, pname):
  63     """Merge a patch file with the given StGIT patch.
  64     """
  65     patchfile = os.path.join(patchdir, pname)
  66     git.apply_patch(filename = patchfile, base = base)
  67
  68 def func(parser, options, args):
  69     """Synchronise a range of patches
  70     """
  71     if options.undo:
  72         if options.ref_branch or options.series:
  73             raise CmdException, \
  74                   '--undo cannot be specified with --ref-branch or --series'
  75         __check_all()
  76
  77         out.start('Undoing the sync of "%s"' % crt_series.get_current())
  78         crt_series.undo_refresh()
  79         git.reset()
  80         out.done()
  81         return
  82
  83     if options.ref_branch:
  84         remote_series = stack.Series(options.ref_branch)
  85         if options.ref_branch == crt_series.get_name():
  86             raise CmdException, 'Cannot synchronise with the current branch'
  87         remote_patches = remote_series.get_applied()
  88
  89         # the merge function merge_patch(patch, pname)
  90         merge_patch = lambda patch, pname: \
  91                       __branch_merge_patch(remote_series, pname)
  92     elif options.series:
  93         patchdir = os.path.dirname(options.series)
  94
  95         remote_patches = []
  96         f = file(options.series)
  97         for line in f:
  98             p = re.sub('#.*$', '', line).strip()
  99             if not p:
 100                 continue
 101             remote_patches.append(p)
 102         f.close()
 103
 104         # the merge function merge_patch(patch, pname)
 105         merge_patch = lambda patch, pname: \
 106                       __series_merge_patch(patch.get_bottom(), patchdir, pname)
 107     else:
 108         raise CmdException, 'No remote branch or series specified'
 109
 110     applied = crt_series.get_applied()
 111     unapplied = crt_series.get_unapplied()
 112
 113     if options.all:
 114         patches = applied
 115     elif len(args) != 0:
 116         patches = parse_patches(args, applied + unapplied, len(applied),
 117                                 ordered = True)
 118     elif applied:
 119         patches = [crt_series.get_current()]
 120     else:
 121         parser.error('no patches applied')
 122
 123     if not patches:
 124         raise CmdException, 'No patches to synchronise'
 125
 126     __check_all()
 127
 128     # only keep the patches to be synchronised
 129     sync_patches = [p for p in patches if p in remote_patches]
 130     if not sync_patches:
 131         raise CmdException, 'No common patches to be synchronised'
 132
 133     # pop to the one before the first patch to be synchronised
 134     first_patch = sync_patches[0]
 135     if first_patch in applied:
 136         to_pop = applied[applied.index(first_patch) + 1:]
 137         if to_pop:
 138             pop_patches(crt_series, to_pop[::-1])
 139         pushed = [first_patch]
 140     else:
 141         to_pop = []
 142         pushed = []
 143     popped = to_pop + [p for p in patches if p in unapplied]
 144
 145     for p in pushed + popped:
 146         if p in popped:
 147             # push this patch
 148             push_patches(crt_series, [p])
 149         if p not in sync_patches:
 150             # nothing to synchronise
 151             continue
 152
 153         # the actual sync
 154         out.start('Synchronising "%s"' % p)
 155
 156         patch = crt_series.get_patch(p)
 157         bottom = patch.get_bottom()
 158         top = patch.get_top()
 159
 160         # reset the patch backup information. That's needed in case we
 161         # undo the sync but there were no changes made
 162         patch.set_bottom(bottom, backup = True)
 163         patch.set_top(top, backup = True)
 164
 165         # the actual merging (either from a branch or an external file)
 166         merge_patch(patch, p)
 167
 168         if git.local_changes(verbose = False):
 169             # index (cache) already updated by the git merge. The
 170             # backup information was already reset above
 171             crt_series.refresh_patch(cache_update = False, backup = False,
 172                                      log = 'sync')
 173             out.done('updated')
 174         else:
 175             out.done()