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# 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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If there is more than one file being compared and the "child" revision
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is the working directory, any modifications made in the external diff
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program will be copied back to the working directory from the temporary
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directory.
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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 meld, runs meld (no need to name twice). If
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# the meld executable is not available, the meld tool in [merge-tools]
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# will be used, if available
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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 $child
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If a program has a graphical interface, it might be interesting to tell
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Mercurial about it. It will prevent the program from being mistakenly
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used in a terminal-only environment (such as an SSH terminal session),
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and will make :hg:`extdiff --per-file` open multiple file diffs at once
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instead of one by one (if you still want to open file diffs one by one,
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you can use the --confirm option).
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Declaring that a tool has a graphical interface can be done with the
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``gui`` flag next to where ``diffargs`` are specified:
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::
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[diff-tools]
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kdiff3.diffargs=--L1 '$plabel1' --L2 '$clabel' $parent $child
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kdiff3.gui = true
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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 __future__ import absolute_import
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import os
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import re
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import shutil
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import stat
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import subprocess
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from mercurial.i18n import _
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from mercurial.node import (
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nullid,
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short,
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)
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from mercurial import (
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archival,
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cmdutil,
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encoding,
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error,
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filemerge,
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formatter,
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pycompat,
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registrar,
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scmutil,
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util,
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)
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from mercurial.utils import (
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procutil,
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stringutil,
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)
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cmdtable = {}
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command = registrar.command(cmdtable)
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configtable = {}
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configitem = registrar.configitem(configtable)
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configitem('extdiff', br'opts\..*',
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default='',
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generic=True,
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)
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configitem('extdiff', br'gui\..*',
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generic=True,
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)
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configitem('diff-tools', br'.*\.diffargs$',
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default=None,
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generic=True,
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)
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configitem('diff-tools', br'.*\.gui$',
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generic=True,
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)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = 'ships-with-hg-core'
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def snapshot(ui, repo, files, node, tmproot, listsubrepos):
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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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fnsandstat = []
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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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if files:
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repo.ui.setconfig("ui", "archivemeta", False)
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archival.archive(repo, base, node, 'files',
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match=scmutil.matchfiles(repo, files),
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subrepos=listsubrepos)
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for fn in sorted(files):
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wfn = util.pconvert(fn)
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ui.note(' %s\n' % wfn)
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if node is None:
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dest = os.path.join(base, wfn)
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fnsandstat.append((dest, repo.wjoin(fn), os.lstat(dest)))
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return dirname, fnsandstat
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def formatcmdline(cmdline, repo_root, do3way,
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parent1, plabel1, parent2, plabel2, child, clabel):
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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 = {'parent': parent1, 'parent1': parent1, 'parent2': parent2,
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'plabel1': plabel1, 'plabel2': plabel2,
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'child': child, 'clabel': clabel,
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'root': repo_root}
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def quote(match):
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pre = match.group(2)
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key = match.group(3)
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if not do3way and key == 'parent2':
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return pre
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return pre + procutil.shellquote(replace[key])
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# Match parent2 first, so 'parent1?' will match both parent1 and parent
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regex = (br'''(['"]?)([^\s'"$]*)'''
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br'\$(parent2|parent1?|child|plabel1|plabel2|clabel|root)\1')
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if not do3way and not re.search(regex, cmdline):
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cmdline += ' $parent1 $child'
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return re.sub(regex, quote, cmdline)
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def _systembackground(cmd, environ=None, cwd=None):
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''' like 'procutil.system', but returns the Popen object directly
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so we don't have to wait on it.
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'''
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cmd = procutil.quotecommand(cmd)
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env = procutil.shellenviron(environ)
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proc = subprocess.Popen(procutil.tonativestr(cmd),
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shell=True, close_fds=procutil.closefds,
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env=procutil.tonativeenv(env),
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cwd=pycompat.rapply(procutil.tonativestr, cwd))
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return proc
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def _runperfilediff(cmdline, repo_root, ui, guitool, do3way, confirm,
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commonfiles, tmproot, dir1a, dir1b,
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dir2root, dir2,
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rev1a, rev1b, rev2):
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# Note that we need to sort the list of files because it was
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# built in an "unstable" way and it's annoying to get files in a
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# random order, especially when "confirm" mode is enabled.
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waitprocs = []
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totalfiles = len(commonfiles)
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for idx, commonfile in enumerate(sorted(commonfiles)):
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path1a = os.path.join(tmproot, dir1a, commonfile)
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label1a = commonfile + rev1a
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if not os.path.isfile(path1a):
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path1a = os.devnull
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path1b = ''
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label1b = ''
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if do3way:
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path1b = os.path.join(tmproot, dir1b, commonfile)
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label1b = commonfile + rev1b
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if not os.path.isfile(path1b):
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path1b = os.devnull
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path2 = os.path.join(dir2root, dir2, commonfile)
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label2 = commonfile + rev2
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if confirm:
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# Prompt before showing this diff
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difffiles = _('diff %s (%d of %d)') % (commonfile, idx + 1,
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totalfiles)
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responses = _('[Yns?]'
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'$$ &Yes, show diff'
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'$$ &No, skip this diff'
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'$$ &Skip remaining diffs'
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'$$ &? (display help)')
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r = ui.promptchoice('%s %s' % (difffiles, responses))
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if r == 3: # ?
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while r == 3:
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for c, t in ui.extractchoices(responses)[1]:
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ui.write('%s - %s\n' % (c, encoding.lower(t)))
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r = ui.promptchoice('%s %s' % (difffiles, responses))
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if r == 0: # yes
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pass
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elif r == 1: # no
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continue
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elif r == 2: # skip
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break
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curcmdline = formatcmdline(
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cmdline, repo_root, do3way=do3way,
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parent1=path1a, plabel1=label1a,
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parent2=path1b, plabel2=label1b,
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child=path2, clabel=label2)
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if confirm or not guitool:
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# Run the comparison program and wait for it to exit
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# before we show the next file.
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# This is because either we need to wait for confirmation
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# from the user between each invocation, or because, as far
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# as we know, the tool doesn't have a GUI, in which case
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# we can't run multiple CLI programs at the same time.
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ui.debug('running %r in %s\n' %
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(pycompat.bytestr(curcmdline), tmproot))
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ui.system(curcmdline, cwd=tmproot, blockedtag='extdiff')
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else:
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# Run the comparison program but don't wait, as we're
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# going to rapid-fire each file diff and then wait on
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# the whole group.
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ui.debug('running %r in %s (backgrounded)\n' %
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(pycompat.bytestr(curcmdline), tmproot))
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proc = _systembackground(curcmdline, cwd=tmproot)
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waitprocs.append(proc)
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if waitprocs:
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with ui.timeblockedsection('extdiff'):
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for proc in waitprocs:
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proc.wait()
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def dodiff(ui, repo, cmdline, pats, opts, guitool=False):
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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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do3way = '$parent2' in cmdline
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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 error.Abort(msg)
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elif change:
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ctx2 = scmutil.revsingle(repo, change, None)
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ctx1a, ctx1b = ctx2.p1(), ctx2.p2()
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else:
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ctx1a, ctx2 = scmutil.revpair(repo, revs)
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if not revs:
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ctx1b = repo[None].p2()
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else:
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ctx1b = repo[nullid]
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perfile = opts.get('per_file')
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confirm = opts.get('confirm')
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node1a = ctx1a.node()
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node1b = ctx1b.node()
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node2 = ctx2.node()
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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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subrepos=opts.get('subrepos')
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matcher = scmutil.match(repo[node2], pats, opts)
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if opts.get('patch'):
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if subrepos:
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raise error.Abort(_('--patch cannot be used with --subrepos'))
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if perfile:
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raise error.Abort(_('--patch cannot be used with --per-file'))
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if node2 is None:
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raise error.Abort(_('--patch requires two revisions'))
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else:
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mod_a, add_a, rem_a = map(set, repo.status(node1a, node2, matcher,
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listsubrepos=subrepos)[:3])
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if do3way:
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mod_b, add_b, rem_b = map(set,
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repo.status(node1b, node2, matcher,
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listsubrepos=subrepos)[: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 = pycompat.mkdtemp(prefix='extdiff.')
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try:
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if not opts.get('patch'):
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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,
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subrepos)[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,
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subrepos)[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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fnsandstat = []
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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, subrepos)[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, fnsandstat = snapshot(ui, repo, modadd, None, tmproot,
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subrepos)
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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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else:
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template = 'hg-%h.patch'
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|
with formatter.nullformatter(ui, 'extdiff', {}) as fm:
|
|
|
cmdutil.export(repo, [repo[node1a].rev(), repo[node2].rev()],
|
|
|
fm,
|
|
|
fntemplate=repo.vfs.reljoin(tmproot, template),
|
|
|
match=matcher)
|
|
|
label1a = cmdutil.makefilename(repo[node1a], template)
|
|
|
label2 = cmdutil.makefilename(repo[node2], template)
|
|
|
dir1a = repo.vfs.reljoin(tmproot, label1a)
|
|
|
dir2 = repo.vfs.reljoin(tmproot, label2)
|
|
|
dir1b = None
|
|
|
label1b = None
|
|
|
fnsandstat = []
|
|
|
|
|
|
if not perfile:
|
|
|
# Run the external tool on the 2 temp directories or the patches
|
|
|
cmdline = formatcmdline(
|
|
|
cmdline, repo.root, do3way=do3way,
|
|
|
parent1=dir1a, plabel1=label1a,
|
|
|
parent2=dir1b, plabel2=label1b,
|
|
|
child=dir2, clabel=label2)
|
|
|
ui.debug('running %r in %s\n' % (pycompat.bytestr(cmdline),
|
|
|
tmproot))
|
|
|
ui.system(cmdline, cwd=tmproot, blockedtag='extdiff')
|
|
|
else:
|
|
|
# Run the external tool once for each pair of files
|
|
|
_runperfilediff(
|
|
|
cmdline, repo.root, ui, guitool=guitool,
|
|
|
do3way=do3way, confirm=confirm,
|
|
|
commonfiles=common, tmproot=tmproot, dir1a=dir1a, dir1b=dir1b,
|
|
|
dir2root=dir2root, dir2=dir2,
|
|
|
rev1a=rev1a, rev1b=rev1b, rev2=rev2)
|
|
|
|
|
|
for copy_fn, working_fn, st in fnsandstat:
|
|
|
cpstat = os.lstat(copy_fn)
|
|
|
# Some tools copy the file and attributes, so mtime may not detect
|
|
|
# all changes. A size check will detect more cases, but not all.
|
|
|
# The only certain way to detect every case is to diff all files,
|
|
|
# which could be expensive.
|
|
|
# copyfile() carries over the permission, so the mode check could
|
|
|
# be in an 'elif' branch, but for the case where the file has
|
|
|
# changed without affecting mtime or size.
|
|
|
if (cpstat[stat.ST_MTIME] != st[stat.ST_MTIME]
|
|
|
or cpstat.st_size != st.st_size
|
|
|
or (cpstat.st_mode & 0o100) != (st.st_mode & 0o100)):
|
|
|
ui.debug('file changed while diffing. '
|
|
|
'Overwriting: %s (src: %s)\n' % (working_fn, copy_fn))
|
|
|
util.copyfile(copy_fn, working_fn)
|
|
|
|
|
|
return 1
|
|
|
finally:
|
|
|
ui.note(_('cleaning up temp directory\n'))
|
|
|
shutil.rmtree(tmproot)
|
|
|
|
|
|
extdiffopts = [
|
|
|
('o', 'option', [],
|
|
|
_('pass option to comparison program'), _('OPT')),
|
|
|
('r', 'rev', [], _('revision'), _('REV')),
|
|
|
('c', 'change', '', _('change made by revision'), _('REV')),
|
|
|
('', 'per-file', False,
|
|
|
_('compare each file instead of revision snapshots')),
|
|
|
('', 'confirm', False,
|
|
|
_('prompt user before each external program invocation')),
|
|
|
('', 'patch', None, _('compare patches for two revisions'))
|
|
|
] + cmdutil.walkopts + cmdutil.subrepoopts
|
|
|
|
|
|
@command('extdiff',
|
|
|
[('p', 'program', '', _('comparison program to run'), _('CMD')),
|
|
|
] + extdiffopts,
|
|
|
_('hg extdiff [OPT]... [FILE]...'),
|
|
|
helpcategory=command.CATEGORY_FILE_CONTENTS,
|
|
|
inferrepo=True)
|
|
|
def extdiff(ui, repo, *pats, **opts):
|
|
|
'''use external program to diff repository (or selected files)
|
|
|
|
|
|
Show differences between revisions for the specified files, using
|
|
|
an external program. The default program used is diff, with
|
|
|
default options "-Npru".
|
|
|
|
|
|
To select a different program, use the -p/--program option. The
|
|
|
program will be passed the names of two directories to compare,
|
|
|
unless the --per-file option is specified (see below). To pass
|
|
|
additional options to the program, use -o/--option. These will be
|
|
|
passed before the names of the directories or files to compare.
|
|
|
|
|
|
When two revision arguments are given, then changes are shown
|
|
|
between those revisions. If only one revision is specified then
|
|
|
that revision is compared to the working directory, and, when no
|
|
|
revisions are specified, the working directory files are compared
|
|
|
to its parent.
|
|
|
|
|
|
The --per-file option runs the external program repeatedly on each
|
|
|
file to diff, instead of once on two directories. By default,
|
|
|
this happens one by one, where the next file diff is open in the
|
|
|
external program only once the previous external program (for the
|
|
|
previous file diff) has exited. If the external program has a
|
|
|
graphical interface, it can open all the file diffs at once instead
|
|
|
of one by one. See :hg:`help -e extdiff` for information about how
|
|
|
to tell Mercurial that a given program has a graphical interface.
|
|
|
|
|
|
The --confirm option will prompt the user before each invocation of
|
|
|
the external program. It is ignored if --per-file isn't specified.
|
|
|
'''
|
|
|
opts = pycompat.byteskwargs(opts)
|
|
|
program = opts.get('program')
|
|
|
option = opts.get('option')
|
|
|
if not program:
|
|
|
program = 'diff'
|
|
|
option = option or ['-Npru']
|
|
|
cmdline = ' '.join(map(procutil.shellquote, [program] + option))
|
|
|
return dodiff(ui, repo, cmdline, pats, opts)
|
|
|
|
|
|
class savedcmd(object):
|
|
|
"""use external program to diff repository (or selected files)
|
|
|
|
|
|
Show differences between revisions for the specified files, using
|
|
|
the following program::
|
|
|
|
|
|
%(path)s
|
|
|
|
|
|
When two revision arguments are given, then changes are shown
|
|
|
between those revisions. If only one revision is specified then
|
|
|
that revision is compared to the working directory, and, when no
|
|
|
revisions are specified, the working directory files are compared
|
|
|
to its parent.
|
|
|
"""
|
|
|
|
|
|
def __init__(self, path, cmdline, isgui):
|
|
|
# We can't pass non-ASCII through docstrings (and path is
|
|
|
# in an unknown encoding anyway), but avoid double separators on
|
|
|
# Windows
|
|
|
docpath = stringutil.escapestr(path).replace(b'\\\\', b'\\')
|
|
|
self.__doc__ %= {r'path': pycompat.sysstr(stringutil.uirepr(docpath))}
|
|
|
self._cmdline = cmdline
|
|
|
self._isgui = isgui
|
|
|
|
|
|
def __call__(self, ui, repo, *pats, **opts):
|
|
|
opts = pycompat.byteskwargs(opts)
|
|
|
options = ' '.join(map(procutil.shellquote, opts['option']))
|
|
|
if options:
|
|
|
options = ' ' + options
|
|
|
return dodiff(ui, repo, self._cmdline + options, pats, opts,
|
|
|
guitool=self._isgui)
|
|
|
|
|
|
def uisetup(ui):
|
|
|
for cmd, path in ui.configitems('extdiff'):
|
|
|
path = util.expandpath(path)
|
|
|
if cmd.startswith('cmd.'):
|
|
|
cmd = cmd[4:]
|
|
|
if not path:
|
|
|
path = procutil.findexe(cmd)
|
|
|
if path is None:
|
|
|
path = filemerge.findexternaltool(ui, cmd) or cmd
|
|
|
diffopts = ui.config('extdiff', 'opts.' + cmd)
|
|
|
cmdline = procutil.shellquote(path)
|
|
|
if diffopts:
|
|
|
cmdline += ' ' + diffopts
|
|
|
isgui = ui.configbool('extdiff', 'gui.' + cmd)
|
|
|
elif cmd.startswith('opts.') or cmd.startswith('gui.'):
|
|
|
continue
|
|
|
else:
|
|
|
if path:
|
|
|
# case "cmd = path opts"
|
|
|
cmdline = path
|
|
|
diffopts = len(pycompat.shlexsplit(cmdline)) > 1
|
|
|
else:
|
|
|
# case "cmd ="
|
|
|
path = procutil.findexe(cmd)
|
|
|
if path is None:
|
|
|
path = filemerge.findexternaltool(ui, cmd) or cmd
|
|
|
cmdline = procutil.shellquote(path)
|
|
|
diffopts = False
|
|
|
isgui = ui.configbool('extdiff', 'gui.' + cmd)
|
|
|
# look for diff arguments in [diff-tools] then [merge-tools]
|
|
|
if not diffopts:
|
|
|
key = cmd + '.diffargs'
|
|
|
for section in ('diff-tools', 'merge-tools'):
|
|
|
args = ui.config(section, key)
|
|
|
if args:
|
|
|
cmdline += ' ' + args
|
|
|
if isgui is None:
|
|
|
isgui = ui.configbool(section, cmd + '.gui') or False
|
|
|
break
|
|
|
command(cmd, extdiffopts[:], _('hg %s [OPTION]... [FILE]...') % cmd,
|
|
|
helpcategory=command.CATEGORY_FILE_CONTENTS,
|
|
|
inferrepo=True)(savedcmd(path, cmdline, isgui))
|
|
|
|
|
|
# tell hggettext to extract docstrings from these functions:
|
|
|
i18nfunctions = [savedcmd]
|
|
|
|
