extdiff: refactor logic which does diff of patches
The current extdiff code is hard to understand on first look. Took me few hours
to grasp the code. Before adding more things, decided to do some refactoring.
Differential Revision: https://phab.mercurial-scm.org/D8686
# closehead.py - Close arbitrary heads without checking them out first
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
'''close arbitrary heads without checking them out first'''
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial import (
bookmarks,
cmdutil,
context,
error,
pycompat,
registrar,
scmutil,
)
cmdtable = {}
command = registrar.command(cmdtable)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = b'ships-with-hg-core'
commitopts = cmdutil.commitopts
commitopts2 = cmdutil.commitopts2
commitopts3 = [(b'r', b'rev', [], _(b'revision to check'), _(b'REV'))]
@command(
b'close-head|close-heads',
commitopts + commitopts2 + commitopts3,
_(b'[OPTION]... [REV]...'),
helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
inferrepo=True,
)
def close_branch(ui, repo, *revs, **opts):
"""close the given head revisions
This is equivalent to checking out each revision in a clean tree and running
``hg commit --close-branch``, except that it doesn't change the working
directory.
The commit message must be specified with -l or -m.
"""
def docommit(rev):
cctx = context.memctx(
repo,
parents=[rev, None],
text=message,
files=[],
filectxfn=None,
user=opts.get(b'user'),
date=opts.get(b'date'),
extra=extra,
)
tr = repo.transaction(b'commit')
ret = repo.commitctx(cctx, True)
bookmarks.update(repo, [rev, None], ret)
cctx.markcommitted(ret)
tr.close()
opts = pycompat.byteskwargs(opts)
revs += tuple(opts.get(b'rev', []))
revs = scmutil.revrange(repo, revs)
if not revs:
raise error.Abort(_(b'no revisions specified'))
heads = []
for branch in repo.branchmap():
heads.extend(repo.branchheads(branch))
heads = {repo[h].rev() for h in heads}
for rev in revs:
if rev not in heads:
raise error.Abort(_(b'revision is not an open head: %d') % rev)
message = cmdutil.logmessage(ui, opts)
if not message:
raise error.Abort(_(b"no commit message specified with -l or -m"))
extra = {b'close': b'1'}
with repo.wlock(), repo.lock():
for rev in revs:
r = repo[rev]
branch = r.branch()
extra[b'branch'] = branch
docommit(r)
return 0