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comparison hgext/extdiff.py @ 2333:de0c05afa511

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new extension: extdiff. allows to use external diff program.
author Vadim Gelfer <vadim.gelfer@gmail.com>
date Sun, 21 May 2006 23:39:07 -0700
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children 391c5d0f9ef3
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2331:953dbfb2824c 2333:de0c05afa511
1 # extdiff.py - external diff program support for mercurial
2 #
3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
4 #
5 # This software may be used and distributed according to the terms
6 # of the GNU General Public License, incorporated herein by reference.
7 #
8 # allow to use external programs to compare revisions, or revision
9 # with working dir. program is called with two arguments: paths to
10 # directories containing snapshots of files to compare.
11 #
12 # to enable:
13 #
14 # [extensions]
15 # hgext.extdiff =
16 #
17 # also allows to configure new diff commands, so you do not need to
18 # type "hg extdiff -p kdiff3" always.
19 #
20 # [extdiff]
21 # # add new command called vdiff, runs kdiff3
22 # cmd.vdiff = kdiff3
23 # # add new command called meld, runs meld (no need to name twice)
24 # cmd.meld =
25 #
26 # you can use -I/-X and list of file or directory names like normal
27 # "hg diff" command. extdiff makes snapshots of only needed files, so
28 # compare program will be fast.
29
30 from mercurial.demandload import demandload
31 from mercurial.i18n import gettext as _
32 from mercurial.node import *
33 demandload(globals(), 'mercurial:commands,util os shutil tempfile')
34
35 def dodiff(ui, repo, diffcmd, pats, opts):
36 def snapshot_node(files, node):
37 '''snapshot files as of some revision'''
38 changes = repo.changelog.read(node)
39 mf = repo.manifest.read(changes[0])
40 dirname = '%s.%s' % (os.path.basename(repo.root), short(node))
41 base = os.path.join(tmproot, dirname)
42 os.mkdir(base)
43 if not ui.quiet:
44 ui.write_err(_('making snapshot of %d files from rev %s\n') %
45 (len(files), short(node)))
46 for fn in files:
47 wfn = util.pconvert(fn)
48 ui.note(' %s\n' % wfn)
49 dest = os.path.join(base, wfn)
50 destdir = os.path.dirname(dest)
51 if not os.path.isdir(destdir):
52 os.makedirs(destdir)
53 repo.wwrite(wfn, repo.file(fn).read(mf[fn]), open(dest, 'w'))
54 return dirname
55
56 def snapshot_wdir(files):
57 '''snapshot files from working directory.
58 if not using snapshot, -I/-X does not work and recursive diff
59 in tools like kdiff3 and meld displays too many files.'''
60 dirname = os.path.basename(repo.root)
61 base = os.path.join(tmproot, dirname)
62 os.mkdir(base)
63 if not ui.quiet:
64 ui.write_err(_('making snapshot of %d files from working dir\n') %
65 (len(files)))
66 for fn in files:
67 wfn = util.pconvert(fn)
68 ui.note(' %s\n' % wfn)
69 dest = os.path.join(base, wfn)
70 destdir = os.path.dirname(dest)
71 if not os.path.isdir(destdir):
72 os.makedirs(destdir)
73 fp = open(dest, 'w')
74 for chunk in util.filechunkiter(repo.wopener(wfn)):
75 fp.write(chunk)
76 return dirname
77
78 node1, node2 = commands.revpair(ui, repo, opts['rev'])
79 files, matchfn, anypats = commands.matchpats(repo, pats, opts)
80 modified, added, removed, deleted, unknown = repo.changes(
81 node1, node2, files, match=matchfn)
82 if not (modified or added or removed):
83 return 0
84
85 tmproot = tempfile.mkdtemp(prefix='extdiff.')
86 try:
87 dir1 = snapshot_node(modified + removed, node1)
88 if node2:
89 dir2 = snapshot_node(modified + added, node2)
90 else:
91 dir2 = snapshot_wdir(modified + added)
92 util.system('%s %s "%s" "%s"' %
93 (diffcmd, ' '.join(opts['option']), dir1, dir2),
94 cwd=tmproot)
95 return 1
96 finally:
97 ui.note(_('cleaning up temp directory\n'))
98 shutil.rmtree(tmproot)
99
100 def extdiff(ui, repo, *pats, **opts):
101 '''use external program to diff repository (or selected files)
102
103 Show differences between revisions for the specified files, using
104 an external program. The default program used is "diff -Pnru".
105 To select a different program, use the -p option. The program
106 will be passed the names of two directories to compare. To pass
107 additional options to the program, use the -o option. These will
108 be passed before the names of the directories to compare.
109
110 When two revision arguments are given, then changes are
111 shown between those revisions. If only one revision is
112 specified then that revision is compared to the working
113 directory, and, when no revisions are specified, the
114 working directory files are compared to its parent.'''
115 return dodiff(ui, repo, opts['program'] or 'diff -Npru', pats, opts)
116
117 cmdtable = {
118 "extdiff":
119 (extdiff,
120 [('p', 'program', '', _('comparison program to run')),
121 ('o', 'option', [], _('pass option to comparison program')),
122 ('r', 'rev', [], _('revision')),
123 ('I', 'include', [], _('include names matching the given patterns')),
124 ('X', 'exclude', [], _('exclude names matching the given patterns'))],
125 _('hg extdiff [OPT]... [FILE]...')),
126 }
127
128 def uisetup(ui):
129 for cmd, path in ui.configitems('extdiff'):
130 if not cmd.startswith('cmd.'): continue
131 cmd = cmd[4:]
132 if not path: path = cmd
133 def save(cmd, path):
134 '''use closure to save diff command to use'''
135 def mydiff(ui, repo, *pats, **opts):
136 return dodiff(ui, repo, path, pats, opts)
137 mydiff.__doc__ = '''use %s to diff repository (or selected files)
138
139 Show differences between revisions for the specified
140 files, using the %s program.
141
142 When two revision arguments are given, then changes are
143 shown between those revisions. If only one revision is
144 specified then that revision is compared to the working
145 directory, and, when no revisions are specified, the
146 working directory files are compared to its parent.''' % (cmd, cmd)
147 return mydiff
148 cmdtable[cmd] = (save(cmd, path),
149 cmdtable['extdiff'][1][1:],
150 _('hg %s [OPT]... [FILE]...') % cmd)