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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(
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b'extdiff', br'opts\..*', default=b'', generic=True,
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)
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configitem(
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b'extdiff', br'gui\..*', generic=True,
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)
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configitem(
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b'diff-tools', br'.*\.diffargs$', default=None, generic=True,
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)
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configitem(
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b'diff-tools', br'.*\.gui$', 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 = b'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 == b"":
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dirname = b"root"
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if node is not None:
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dirname = b'%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(
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_(b'making snapshot of %d files from rev %s\n')
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% (len(files), short(node))
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)
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else:
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ui.note(
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_(b'making snapshot of %d files from working directory\n')
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% (len(files))
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)
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if files:
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repo.ui.setconfig(b"ui", b"archivemeta", False)
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archival.archive(
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repo,
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base,
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node,
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b'files',
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match=scmutil.matchfiles(repo, files),
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subrepos=listsubrepos,
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)
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for fn in sorted(files):
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wfn = util.pconvert(fn)
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ui.note(b' %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(
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cmdline,
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repo_root,
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do3way,
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parent1,
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plabel1,
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parent2,
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plabel2,
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child,
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clabel,
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):
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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 = {
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b'parent': parent1,
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b'parent1': parent1,
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b'parent2': parent2,
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b'plabel1': plabel1,
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b'plabel2': plabel2,
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b'child': child,
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b'clabel': clabel,
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b'root': repo_root,
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}
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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 == b'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 = (
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br'''(['"]?)([^\s'"$]*)'''
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br'\$(parent2|parent1?|child|plabel1|plabel2|clabel|root)\1'
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)
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if not do3way and not re.search(regex, cmdline):
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cmdline += b' $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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env = procutil.shellenviron(environ)
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proc = subprocess.Popen(
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procutil.tonativestr(cmd),
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shell=True,
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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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)
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return proc
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def _runperfilediff(
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cmdline,
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repo_root,
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ui,
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guitool,
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do3way,
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confirm,
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commonfiles,
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tmproot,
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dir1a,
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dir1b,
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dir2root,
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dir2,
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rev1a,
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rev1b,
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rev2,
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):
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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 = pycompat.osdevnull
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path1b = b''
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label1b = b''
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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 = pycompat.osdevnull
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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 = _(b'diff %s (%d of %d)') % (
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commonfile,
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idx + 1,
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totalfiles,
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)
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responses = _(
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b'[Yns?]'
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b'$$ &Yes, show diff'
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b'$$ &No, skip this diff'
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b'$$ &Skip remaining diffs'
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b'$$ &? (display help)'
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)
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r = ui.promptchoice(b'%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(b'%s - %s\n' % (c, encoding.lower(t)))
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r = ui.promptchoice(b'%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,
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repo_root,
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do3way=do3way,
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parent1=path1a,
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plabel1=label1a,
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parent2=path1b,
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plabel2=label1b,
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child=path2,
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clabel=label2,
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)
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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(
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b'running %r in %s\n' % (pycompat.bytestr(curcmdline), tmproot)
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)
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ui.system(curcmdline, cwd=tmproot, blockedtag=b'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(
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b'running %r in %s (backgrounded)\n'
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% (pycompat.bytestr(curcmdline), tmproot)
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)
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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(b'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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cmdutil.check_at_most_one_arg(opts, b'rev', b'change')
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revs = opts.get(b'rev')
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change = opts.get(b'change')
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do3way = b'$parent2' in cmdline
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if 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(b'per_file')
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confirm = opts.get(b'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(b'subrepos')
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matcher = scmutil.match(repo[node2], pats, opts)
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if opts.get(b'patch'):
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if subrepos:
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raise error.Abort(_(b'--patch cannot be used with --subrepos'))
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if perfile:
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raise error.Abort(_(b'--patch cannot be used with --per-file'))
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if node2 is None:
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raise error.Abort(_(b'--patch requires two revisions'))
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else:
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st = repo.status(node1a, node2, matcher, listsubrepos=subrepos)
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mod_a, add_a, rem_a = set(st.modified), set(st.added), set(st.removed)
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if do3way:
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stb = repo.status(node1b, node2, matcher, listsubrepos=subrepos)
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mod_b, add_b, rem_b = (
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set(stb.modified),
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set(stb.added),
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set(stb.removed),
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)
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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=b'extdiff.')
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try:
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if not opts.get(b'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, subrepos)[
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0
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]
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rev1a = b'@%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(
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ui, repo, dir1b_files, node1b, tmproot, subrepos
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)[0]
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rev1b = b'@%d' % repo[node1b].rev()
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else:
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dir1b = None
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rev1b = b''
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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 = b''
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|
rev2 = b''
|
|
|
if node2:
|
|
|
dir2 = snapshot(ui, repo, modadd, node2, tmproot, subrepos)[0]
|
|
|
rev2 = b'@%d' % repo[node2].rev()
|
|
|
elif len(common) > 1:
|
|
|
# we only actually need to get the files to copy back to
|
|
|
# the working dir in this case (because the other cases
|
|
|
# are: diffing 2 revisions or single file -- in which case
|
|
|
# the file is already directly passed to the diff tool).
|
|
|
dir2, fnsandstat = snapshot(
|
|
|
ui, repo, modadd, None, tmproot, subrepos
|
|
|
)
|
|
|
else:
|
|
|
# This lets the diff tool open the changed file directly
|
|
|
dir2 = b''
|
|
|
dir2root = repo.root
|
|
|
|
|
|
label1a = rev1a
|
|
|
label1b = rev1b
|
|
|
label2 = rev2
|
|
|
|
|
|
# If only one change, diff the files instead of the directories
|
|
|
# Handle bogus modifies correctly by checking if the files exist
|
|
|
if len(common) == 1:
|
|
|
common_file = util.localpath(common.pop())
|
|
|
dir1a = os.path.join(tmproot, dir1a, common_file)
|
|
|
label1a = common_file + rev1a
|
|
|
if not os.path.isfile(dir1a):
|
|
|
dir1a = pycompat.osdevnull
|
|
|
if do3way:
|
|
|
dir1b = os.path.join(tmproot, dir1b, common_file)
|
|
|
label1b = common_file + rev1b
|
|
|
if not os.path.isfile(dir1b):
|
|
|
dir1b = pycompat.osdevnull
|
|
|
dir2 = os.path.join(dir2root, dir2, common_file)
|
|
|
label2 = common_file + rev2
|
|
|
else:
|
|
|
template = b'hg-%h.patch'
|
|
|
with formatter.nullformatter(ui, b'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(
|
|
|
b'running %r in %s\n' % (pycompat.bytestr(cmdline), tmproot)
|
|
|
)
|
|
|
ui.system(cmdline, cwd=tmproot, blockedtag=b'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(
|
|
|
b'file changed while diffing. '
|
|
|
b'Overwriting: %s (src: %s)\n' % (working_fn, copy_fn)
|
|
|
)
|
|
|
util.copyfile(copy_fn, working_fn)
|
|
|
|
|
|
return 1
|
|
|
finally:
|
|
|
ui.note(_(b'cleaning up temp directory\n'))
|
|
|
shutil.rmtree(tmproot)
|
|
|
|
|
|
|
|
|
extdiffopts = (
|
|
|
[
|
|
|
(
|
|
|
b'o',
|
|
|
b'option',
|
|
|
[],
|
|
|
_(b'pass option to comparison program'),
|
|
|
_(b'OPT'),
|
|
|
),
|
|
|
(b'r', b'rev', [], _(b'revision'), _(b'REV')),
|
|
|
(b'c', b'change', b'', _(b'change made by revision'), _(b'REV')),
|
|
|
(
|
|
|
b'',
|
|
|
b'per-file',
|
|
|
False,
|
|
|
_(b'compare each file instead of revision snapshots'),
|
|
|
),
|
|
|
(
|
|
|
b'',
|
|
|
b'confirm',
|
|
|
False,
|
|
|
_(b'prompt user before each external program invocation'),
|
|
|
),
|
|
|
(b'', b'patch', None, _(b'compare patches for two revisions')),
|
|
|
]
|
|
|
+ cmdutil.walkopts
|
|
|
+ cmdutil.subrepoopts
|
|
|
)
|
|
|
|
|
|
|
|
|
@command(
|
|
|
b'extdiff',
|
|
|
[(b'p', b'program', b'', _(b'comparison program to run'), _(b'CMD')),]
|
|
|
+ extdiffopts,
|
|
|
_(b'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(b'program')
|
|
|
option = opts.get(b'option')
|
|
|
if not program:
|
|
|
program = b'diff'
|
|
|
option = option or [b'-Npru']
|
|
|
cmdline = b' '.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__ %= {'path': pycompat.sysstr(stringutil.uirepr(docpath))}
|
|
|
self._cmdline = cmdline
|
|
|
self._isgui = isgui
|
|
|
|
|
|
def __call__(self, ui, repo, *pats, **opts):
|
|
|
opts = pycompat.byteskwargs(opts)
|
|
|
options = b' '.join(map(procutil.shellquote, opts[b'option']))
|
|
|
if options:
|
|
|
options = b' ' + options
|
|
|
return dodiff(
|
|
|
ui, repo, self._cmdline + options, pats, opts, guitool=self._isgui
|
|
|
)
|
|
|
|
|
|
|
|
|
def uisetup(ui):
|
|
|
for cmd, path in ui.configitems(b'extdiff'):
|
|
|
path = util.expandpath(path)
|
|
|
if cmd.startswith(b'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(b'extdiff', b'opts.' + cmd)
|
|
|
cmdline = procutil.shellquote(path)
|
|
|
if diffopts:
|
|
|
cmdline += b' ' + diffopts
|
|
|
isgui = ui.configbool(b'extdiff', b'gui.' + cmd)
|
|
|
elif cmd.startswith(b'opts.') or cmd.startswith(b'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(b'extdiff', b'gui.' + cmd)
|
|
|
# look for diff arguments in [diff-tools] then [merge-tools]
|
|
|
if not diffopts:
|
|
|
key = cmd + b'.diffargs'
|
|
|
for section in (b'diff-tools', b'merge-tools'):
|
|
|
args = ui.config(section, key)
|
|
|
if args:
|
|
|
cmdline += b' ' + args
|
|
|
if isgui is None:
|
|
|
isgui = ui.configbool(section, cmd + b'.gui') or False
|
|
|
break
|
|
|
command(
|
|
|
cmd,
|
|
|
extdiffopts[:],
|
|
|
_(b'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]
|
|
|
|
