mirror of
https://github.com/facebook/sapling.git
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a5e71891bd
Maintain a whitelist of commands to infer the repo for instead. The whitelist contains those commands that take file(s) in the working dir as arguments.
334 lines
12 KiB
Python
334 lines
12 KiB
Python
# extdiff.py - external diff program support for mercurial
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#
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# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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'''command to allow external programs to compare revisions
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The extdiff Mercurial extension allows you to use external programs
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to compare revisions, or revision with working directory. The external
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diff programs are called with a configurable set of options and two
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non-option arguments: paths to directories containing snapshots of
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files to compare.
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The extdiff extension also allows you to configure new diff commands, so
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you do not need to type :hg:`extdiff -p kdiff3` always. ::
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[extdiff]
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# add new command that runs GNU diff(1) in 'context diff' mode
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cdiff = gdiff -Nprc5
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## or the old way:
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#cmd.cdiff = gdiff
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#opts.cdiff = -Nprc5
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# add new command called vdiff, runs kdiff3
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vdiff = kdiff3
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# add new command called meld, runs meld (no need to name twice)
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meld =
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# add new command called vimdiff, runs gvimdiff with DirDiff plugin
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# (see http://www.vim.org/scripts/script.php?script_id=102) Non
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# English user, be sure to put "let g:DirDiffDynamicDiffText = 1" in
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# your .vimrc
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vimdiff = gvim -f "+next" \\
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"+execute 'DirDiff' fnameescape(argv(0)) fnameescape(argv(1))"
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Tool arguments can include variables that are expanded at runtime::
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$parent1, $plabel1 - filename, descriptive label of first parent
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$child, $clabel - filename, descriptive label of child revision
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$parent2, $plabel2 - filename, descriptive label of second parent
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$root - repository root
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$parent is an alias for $parent1.
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The extdiff extension will look in your [diff-tools] and [merge-tools]
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sections for diff tool arguments, when none are specified in [extdiff].
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::
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[extdiff]
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kdiff3 =
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[diff-tools]
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kdiff3.diffargs=--L1 '$plabel1' --L2 '$clabel' $parent $child
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You can use -I/-X and list of file or directory names like normal
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:hg:`diff` command. The extdiff extension makes snapshots of only
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needed files, so running the external diff program will actually be
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pretty fast (at least faster than having to compare the entire tree).
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'''
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from mercurial.i18n import _
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from mercurial.node import short, nullid
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from mercurial import scmutil, scmutil, util, commands, encoding
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import os, shlex, shutil, tempfile, re
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testedwith = 'internal'
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def snapshot(ui, repo, files, node, tmproot):
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'''snapshot files as of some revision
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if not using snapshot, -I/-X does not work and recursive diff
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in tools like kdiff3 and meld displays too many files.'''
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dirname = os.path.basename(repo.root)
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if dirname == "":
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dirname = "root"
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if node is not None:
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dirname = '%s.%s' % (dirname, short(node))
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base = os.path.join(tmproot, dirname)
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os.mkdir(base)
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if node is not None:
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ui.note(_('making snapshot of %d files from rev %s\n') %
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(len(files), short(node)))
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else:
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ui.note(_('making snapshot of %d files from working directory\n') %
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(len(files)))
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wopener = scmutil.opener(base)
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fns_and_mtime = []
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ctx = repo[node]
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for fn in files:
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wfn = util.pconvert(fn)
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if wfn not in ctx:
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# File doesn't exist; could be a bogus modify
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continue
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ui.note(' %s\n' % wfn)
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dest = os.path.join(base, wfn)
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fctx = ctx[wfn]
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data = repo.wwritedata(wfn, fctx.data())
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if 'l' in fctx.flags():
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wopener.symlink(data, wfn)
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else:
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wopener.write(wfn, data)
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if 'x' in fctx.flags():
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util.setflags(dest, False, True)
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if node is None:
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fns_and_mtime.append((dest, repo.wjoin(fn),
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os.lstat(dest).st_mtime))
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return dirname, fns_and_mtime
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def dodiff(ui, repo, diffcmd, diffopts, pats, opts):
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'''Do the actual diff:
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- copy to a temp structure if diffing 2 internal revisions
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- copy to a temp structure if diffing working revision with
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another one and more than 1 file is changed
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- just invoke the diff for a single file in the working dir
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'''
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revs = opts.get('rev')
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change = opts.get('change')
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args = ' '.join(diffopts)
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do3way = '$parent2' in args
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if revs and change:
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msg = _('cannot specify --rev and --change at the same time')
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raise util.Abort(msg)
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elif change:
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node2 = scmutil.revsingle(repo, change, None).node()
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node1a, node1b = repo.changelog.parents(node2)
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else:
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node1a, node2 = scmutil.revpair(repo, revs)
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if not revs:
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node1b = repo.dirstate.p2()
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else:
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node1b = nullid
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# Disable 3-way merge if there is only one parent
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if do3way:
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if node1b == nullid:
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do3way = False
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matcher = scmutil.match(repo[node2], pats, opts)
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mod_a, add_a, rem_a = map(set, repo.status(node1a, node2, matcher)[:3])
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if do3way:
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mod_b, add_b, rem_b = map(set, repo.status(node1b, node2, matcher)[:3])
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else:
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mod_b, add_b, rem_b = set(), set(), set()
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modadd = mod_a | add_a | mod_b | add_b
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common = modadd | rem_a | rem_b
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if not common:
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return 0
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tmproot = tempfile.mkdtemp(prefix='extdiff.')
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try:
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# Always make a copy of node1a (and node1b, if applicable)
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dir1a_files = mod_a | rem_a | ((mod_b | add_b) - add_a)
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dir1a = snapshot(ui, repo, dir1a_files, node1a, tmproot)[0]
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rev1a = '@%d' % repo[node1a].rev()
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if do3way:
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dir1b_files = mod_b | rem_b | ((mod_a | add_a) - add_b)
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dir1b = snapshot(ui, repo, dir1b_files, node1b, tmproot)[0]
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rev1b = '@%d' % repo[node1b].rev()
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else:
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dir1b = None
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rev1b = ''
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fns_and_mtime = []
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# If node2 in not the wc or there is >1 change, copy it
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dir2root = ''
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rev2 = ''
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if node2:
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dir2 = snapshot(ui, repo, modadd, node2, tmproot)[0]
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rev2 = '@%d' % repo[node2].rev()
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elif len(common) > 1:
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#we only actually need to get the files to copy back to
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#the working dir in this case (because the other cases
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#are: diffing 2 revisions or single file -- in which case
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#the file is already directly passed to the diff tool).
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dir2, fns_and_mtime = snapshot(ui, repo, modadd, None, tmproot)
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else:
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# This lets the diff tool open the changed file directly
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dir2 = ''
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dir2root = repo.root
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label1a = rev1a
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label1b = rev1b
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label2 = rev2
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# If only one change, diff the files instead of the directories
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# Handle bogus modifies correctly by checking if the files exist
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if len(common) == 1:
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common_file = util.localpath(common.pop())
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dir1a = os.path.join(tmproot, dir1a, common_file)
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label1a = common_file + rev1a
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if not os.path.isfile(dir1a):
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dir1a = os.devnull
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if do3way:
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dir1b = os.path.join(tmproot, dir1b, common_file)
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label1b = common_file + rev1b
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if not os.path.isfile(dir1b):
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dir1b = os.devnull
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dir2 = os.path.join(dir2root, dir2, common_file)
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label2 = common_file + rev2
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# Function to quote file/dir names in the argument string.
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# When not operating in 3-way mode, an empty string is
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# returned for parent2
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replace = dict(parent=dir1a, parent1=dir1a, parent2=dir1b,
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plabel1=label1a, plabel2=label1b,
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clabel=label2, child=dir2,
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root=repo.root)
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def quote(match):
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key = match.group()[1:]
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if not do3way and key == 'parent2':
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return ''
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return util.shellquote(replace[key])
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# Match parent2 first, so 'parent1?' will match both parent1 and parent
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regex = '\$(parent2|parent1?|child|plabel1|plabel2|clabel|root)'
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if not do3way and not re.search(regex, args):
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args += ' $parent1 $child'
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args = re.sub(regex, quote, args)
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cmdline = util.shellquote(diffcmd) + ' ' + args
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ui.debug('running %r in %s\n' % (cmdline, tmproot))
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util.system(cmdline, cwd=tmproot, out=ui.fout)
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for copy_fn, working_fn, mtime in fns_and_mtime:
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if os.lstat(copy_fn).st_mtime != mtime:
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ui.debug('file changed while diffing. '
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'Overwriting: %s (src: %s)\n' % (working_fn, copy_fn))
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util.copyfile(copy_fn, working_fn)
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return 1
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finally:
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ui.note(_('cleaning up temp directory\n'))
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shutil.rmtree(tmproot)
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def extdiff(ui, repo, *pats, **opts):
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'''use external program to diff repository (or selected files)
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Show differences between revisions for the specified files, using
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an external program. The default program used is diff, with
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default options "-Npru".
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To select a different program, use the -p/--program option. The
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program will be passed the names of two directories to compare. To
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pass additional options to the program, use -o/--option. These
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will be passed before the names of the directories to compare.
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When two revision arguments are given, then changes are shown
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between those revisions. If only one revision is specified then
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that revision is compared to the working directory, and, when no
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revisions are specified, the working directory files are compared
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to its parent.'''
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program = opts.get('program')
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option = opts.get('option')
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if not program:
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program = 'diff'
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option = option or ['-Npru']
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return dodiff(ui, repo, program, option, pats, opts)
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cmdtable = {
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"extdiff":
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(extdiff,
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[('p', 'program', '',
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_('comparison program to run'), _('CMD')),
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('o', 'option', [],
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_('pass option to comparison program'), _('OPT')),
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('r', 'rev', [],
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_('revision'), _('REV')),
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('c', 'change', '',
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_('change made by revision'), _('REV')),
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] + commands.walkopts,
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_('hg extdiff [OPT]... [FILE]...')),
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}
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def uisetup(ui):
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for cmd, path in ui.configitems('extdiff'):
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if cmd.startswith('cmd.'):
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cmd = cmd[4:]
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if not path:
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path = cmd
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diffopts = ui.config('extdiff', 'opts.' + cmd, '')
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diffopts = diffopts and [diffopts] or []
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elif cmd.startswith('opts.'):
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continue
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else:
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# command = path opts
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if path:
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diffopts = shlex.split(path)
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path = diffopts.pop(0)
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else:
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path, diffopts = cmd, []
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# look for diff arguments in [diff-tools] then [merge-tools]
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if diffopts == []:
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args = ui.config('diff-tools', cmd+'.diffargs') or \
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ui.config('merge-tools', cmd+'.diffargs')
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if args:
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diffopts = shlex.split(args)
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def save(cmd, path, diffopts):
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'''use closure to save diff command to use'''
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def mydiff(ui, repo, *pats, **opts):
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return dodiff(ui, repo, path, diffopts + opts['option'],
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pats, opts)
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doc = _('''\
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use %(path)s to diff repository (or selected files)
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Show differences between revisions for the specified files, using
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the %(path)s program.
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When two revision arguments are given, then changes are shown
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between those revisions. If only one revision is specified then
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that revision is compared to the working directory, and, when no
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revisions are specified, the working directory files are compared
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to its parent.\
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''') % dict(path=util.uirepr(path))
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# We must translate the docstring right away since it is
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# used as a format string. The string will unfortunately
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# be translated again in commands.helpcmd and this will
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# fail when the docstring contains non-ASCII characters.
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# Decoding the string to a Unicode string here (using the
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# right encoding) prevents that.
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mydiff.__doc__ = doc.decode(encoding.encoding)
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return mydiff
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cmdtable[cmd] = (save(cmd, path, diffopts),
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cmdtable['extdiff'][1][1:],
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_('hg %s [OPTION]... [FILE]...') % cmd)
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commands.inferrepo += " extdiff"
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