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

   1
   2 __copyright__ = """
   3 Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License version 2 as
   7 published by the Free Software Foundation.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17 """
  18
  19 from stgit.commands import common
  20 from stgit.lib import transaction
  21 from stgit import argparse
  22 from stgit.argparse import opt
  23
  24 help = 'Pop one or more patches from the stack'
  25 kind = 'stack'
  26 usage = ['[options] [--] [<patch1>] [<patch2>] [<patch3>..<patch4>]']
  27 description = """
  28 Pop the topmost patch or a range of patches from the stack. The
  29 command fails if there are conflicts or local changes (and --keep was
  30 not specified).
  31
  32 A series of pop and push operations are performed so that only the
  33 patches passed on the command line are popped from the stack. Some of
  34 the push operations may fail because of conflicts ("stg undo" would
  35 revert the last push operation)."""
  36
  37 args = [argparse.patch_range(argparse.applied_patches)]
  38 options = [
  39     opt('-a', '--all', action = 'store_true',
  40         short = 'Pop all the applied patches'),
  41     opt('-n', '--number', type = 'int',
  42         short = 'Pop the specified number of patches', long = '''
  43         Pop the specified number of patches.
  44
  45         With a negative number, pop all but that many patches.'''),
  46     ] + argparse.keep_option()
  47
  48 directory = common.DirectoryHasRepositoryLib()
  49
  50 def func(parser, options, args):
  51     """Pop the given patches or the topmost one from the stack."""
  52     stack = directory.repository.current_stack
  53     iw = stack.repository.default_iw
  54     clean_iw = (not options.keep and iw) or None
  55     trans = transaction.StackTransaction(stack, 'pop',
  56                                          check_clean_iw = clean_iw)
  57
  58     if options.number == 0:
  59         # explicitly allow this without any warning/error message
  60         return
  61
  62     if not trans.applied:
  63         raise common.CmdException('No patches applied')
  64
  65     if options.all:
  66         patches = trans.applied
  67     elif options.number is not None:
  68         # reverse it twice to also work with negative or bigger than
  69         # the length numbers
  70         patches = trans.applied[::-1][:options.number][::-1]
  71     elif not args:
  72         patches = [trans.applied[-1]]
  73     else:
  74         patches = common.parse_patches(args, trans.applied, ordered = True)
  75
  76     if not patches:
  77         raise common.CmdException('No patches to pop')
  78
  79     applied = [p for p in trans.applied if not p in set(patches)]
  80     unapplied = patches + trans.unapplied
  81     try:
  82         trans.reorder_patches(applied, unapplied, iw = iw)
  83     except transaction.TransactionException:
  84         pass
  85     return trans.run(iw)