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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
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# of the GNU General Public License, incorporated herein by reference.
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#
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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 dir. The external diff
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# 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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#
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# To enable this extension:
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#
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# [extensions]
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# hgext.extdiff =
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#
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# The `extdiff' extension also allows 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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#
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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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# 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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# cmd.vdiff = kdiff3
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# # add new command called meld, runs meld (no need to name twice)
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# cmd.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)
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# cmd.vimdiff = LC_ALL=C gvim -f '+bdel 1 2' '+ execute "DirDiff ".argv(0)." ".argv(1)'
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#
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# Each custom diff commands can have two parts: a `cmd' and an `opts'
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# part. The cmd.xxx option defines the name of an executable program
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# that will be run, and opts.xxx defines a set of command-line options
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# which will be inserted to the command between the program name and
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# the files/directories to diff (i.e. the cdiff example above).
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#
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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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from mercurial.demandload import demandload
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from mercurial.i18n import gettext as _
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from mercurial.node import *
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demandload(globals(), 'mercurial:commands,cmdutil,util os shutil tempfile')
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def dodiff(ui, repo, diffcmd, diffopts, pats, opts):
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def snapshot_node(files, node):
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'''snapshot files as of some revision'''
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changes = repo.changelog.read(node)
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mf = repo.manifest.read(changes[0])
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dirname = '%s.%s' % (os.path.basename(repo.root), short(node))
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base = os.path.join(tmproot, dirname)
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os.mkdir(base)
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if not ui.quiet:
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ui.write_err(_('making snapshot of %d files from rev %s\n') %
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(len(files), short(node)))
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for fn in files:
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wfn = util.pconvert(fn)
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ui.note(' %s\n' % wfn)
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dest = os.path.join(base, wfn)
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destdir = os.path.dirname(dest)
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if not os.path.isdir(destdir):
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os.makedirs(destdir)
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repo.wwrite(wfn, repo.file(fn).read(mf[fn]), open(dest, 'w'))
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return dirname
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def snapshot_wdir(files):
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'''snapshot files from working directory.
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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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base = os.path.join(tmproot, dirname)
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os.mkdir(base)
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if not ui.quiet:
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ui.write_err(_('making snapshot of %d files from working dir\n') %
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(len(files)))
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for fn in files:
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wfn = util.pconvert(fn)
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ui.note(' %s\n' % wfn)
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dest = os.path.join(base, wfn)
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destdir = os.path.dirname(dest)
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if not os.path.isdir(destdir):
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os.makedirs(destdir)
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fp = open(dest, 'w')
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for chunk in util.filechunkiter(repo.wopener(wfn)):
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fp.write(chunk)
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return dirname
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node1, node2 = commands.revpair(ui, repo, opts['rev'])
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files, matchfn, anypats = cmdutil.matchpats(repo, pats, opts)
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modified, added, removed, deleted, unknown = repo.status(
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node1, node2, files, match=matchfn)[:5]
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if not (modified or added or removed):
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return 0
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tmproot = tempfile.mkdtemp(prefix='extdiff.')
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try:
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dir1 = snapshot_node(modified + removed, node1)
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if node2:
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dir2 = snapshot_node(modified + added, node2)
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else:
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dir2 = snapshot_wdir(modified + added)
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cmdline = ('%s %s %s %s' %
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(util.shellquote(diffcmd),
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' '.join(map(util.shellquote, diffopts)),
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util.shellquote(dir1), util.shellquote(dir2)))
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ui.debug('running %r in %s\n' % (cmdline, tmproot))
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util.system(cmdline, cwd=tmproot)
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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 option. The program
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will be passed the names of two directories to compare. To pass
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additional options to the program, use the -o option. These will
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be passed before the names of the directories to compare.
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When two revision arguments are given, then changes are
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shown between those revisions. If only one revision is
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specified then that revision is compared to the working
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directory, and, when no revisions are specified, the
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working directory files are compared to its parent.'''
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return dodiff(ui, repo, opts['program'] or 'diff',
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opts['option'] or ['-Npru'], pats, opts)
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cmdtable = {
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"extdiff":
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(extdiff,
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[('p', 'program', '', _('comparison program to run')),
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('o', 'option', [], _('pass option to comparison program')),
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('r', 'rev', [], _('revision')),
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('I', 'include', [], _('include names matching the given patterns')),
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('X', 'exclude', [], _('exclude names matching the given patterns'))],
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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 not cmd.startswith('cmd.'): continue
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cmd = cmd[4:]
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if not path: 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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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, pats, opts)
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mydiff.__doc__ = '''use %(path)r to diff repository (or selected files)
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Show differences between revisions for the specified
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files, using the %(path)r program.
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When two revision arguments are given, then changes are
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shown between those revisions. If only one revision is
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specified then that revision is compared to the working
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directory, and, when no revisions are specified, the
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working directory files are compared to its parent.''' % {
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'path': path,
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}
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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 [OPT]... [FILE]...') % cmd)
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