# Minimal support for git commands on an hg repository
#
# Copyright 2005, 2006 Chris Mason <mason@suse.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
#
# The hgk extension allows browsing the history of a repository in a
# graphical way. It requires Tcl/Tk version 8.4 or later. (Tcl/Tk is
# not distributed with Mercurial.)
#
# hgk consists of two parts: a Tcl script that does the displaying and
# querying of information, and an extension to mercurial named hgk.py,
# which provides hooks for hgk to get information. hgk can be found in
# the contrib directory, and hgk.py can be found in the hgext
# directory.
#
# To load the hgext.py extension, add it to your .hgrc file (you have
# to use your global $HOME/.hgrc file, not one in a repository). You
# can specify an absolute path:
#
# [extensions]
# hgk=/usr/local/lib/hgk.py
#
# Mercurial can also scan the default python library path for a file
# named 'hgk.py' if you set hgk empty:
#
# [extensions]
# hgk=
#
# The hg view command will launch the hgk Tcl script. For this command
# to work, hgk must be in your search path. Alternately, you can
# specify the path to hgk in your .hgrc file:
#
# [hgk]
# path=/location/of/hgk
#
# hgk can make use of the extdiff extension to visualize
# revisions. Assuming you had already configured extdiff vdiff
# command, just add:
#
# [hgk]
# vdiff=vdiff
#
# Revisions context menu will now display additional entries to fire
# vdiff on hovered and selected revisions.
import os
from mercurial import commands, util, patch, revlog
from mercurial.node import nullid, nullrev, short
def difftree(ui, repo, node1=None, node2=None, *files, **opts):
"""diff trees from two commits"""
def __difftree(repo, node1, node2, files=[]):
assert node2 is not None
mmap = repo.changectx(node1).manifest()
mmap2 = repo.changectx(node2).manifest()
status = repo.status(node1, node2, files=files)[:5]
modified, added, removed, deleted, unknown = status
empty = short(nullid)
for f in modified:
# TODO get file permissions
ui.write(":100664 100664 %s %s M\t%s\t%s\n" %
(short(mmap[f]), short(mmap2[f]), f, f))
for f in added:
ui.write(":000000 100664 %s %s N\t%s\t%s\n" %
(empty, short(mmap2[f]), f, f))
for f in removed:
ui.write(":100664 000000 %s %s D\t%s\t%s\n" %
(short(mmap[f]), empty, f, f))
##
while True:
if opts['stdin']:
try:
line = raw_input().split(' ')
node1 = line[0]
if len(line) > 1:
node2 = line[1]
else:
node2 = None
except EOFError:
break
node1 = repo.lookup(node1)
if node2:
node2 = repo.lookup(node2)
else:
node2 = node1
node1 = repo.changelog.parents(node1)[0]
if opts['patch']:
if opts['pretty']:
catcommit(ui, repo, node2, "")
patch.diff(repo, node1, node2,
files=files,
opts=patch.diffopts(ui, {'git': True}))
else:
__difftree(repo, node1, node2, files=files)
if not opts['stdin']:
break
def catcommit(ui, repo, n, prefix, ctx=None):
nlprefix = '\n' + prefix;
if ctx is None:
ctx = repo.changectx(n)
(p1, p2) = ctx.parents()
ui.write("tree %s\n" % short(ctx.changeset()[0])) # use ctx.node() instead ??
if p1: ui.write("parent %s\n" % short(p1.node()))
if p2: ui.write("parent %s\n" % short(p2.node()))
date = ctx.date()
description = ctx.description().replace("\0", "")
lines = description.splitlines()
if lines and lines[-1].startswith('committer:'):
committer = lines[-1].split(': ')[1].rstrip()
else:
committer = ctx.user()
ui.write("author %s %s %s\n" % (ctx.user(), int(date[0]), date[1]))
ui.write("committer %s %s %s\n" % (committer, int(date[0]), date[1]))
ui.write("revision %d\n" % ctx.rev())
ui.write("branch %s\n\n" % ctx.branch())
if prefix != "":
ui.write("%s%s\n" % (prefix, description.replace('\n', nlprefix).strip()))
else:
ui.write(description + "\n")
if prefix:
ui.write('\0')
def base(ui, repo, node1, node2):
"""Output common ancestor information"""
node1 = repo.lookup(node1)
node2 = repo.lookup(node2)
n = repo.changelog.ancestor(node1, node2)
ui.write(short(n) + "\n")
def catfile(ui, repo, type=None, r=None, **opts):
"""cat a specific revision"""
# in stdin mode, every line except the commit is prefixed with two
# spaces. This way the our caller can find the commit without magic
# strings
#
prefix = ""
if opts['stdin']:
try:
(type, r) = raw_input().split(' ');
prefix = " "
except EOFError:
return
else:
if not type or not r:
ui.warn("cat-file: type or revision not supplied\n")
commands.help_(ui, 'cat-file')
while r:
if type != "commit":
ui.warn("aborting hg cat-file only understands commits\n")
return 1;
n = repo.lookup(r)
catcommit(ui, repo, n, prefix)
if opts['stdin']:
try:
(type, r) = raw_input().split(' ');
except EOFError:
break
else:
break
# git rev-tree is a confusing thing. You can supply a number of
# commit sha1s on the command line, and it walks the commit history
# telling you which commits are reachable from the supplied ones via
# a bitmask based on arg position.
# you can specify a commit to stop at by starting the sha1 with ^
def revtree(ui, args, repo, full="tree", maxnr=0, parents=False):
def chlogwalk():
count = repo.changelog.count()
i = count
l = [0] * 100
chunk = 100
while True:
if chunk > i:
chunk = i
i = 0
else:
i -= chunk
for x in xrange(0, chunk):
if i + x >= count:
l[chunk - x:] = [0] * (chunk - x)
break
if full != None:
l[x] = repo.changectx(i + x)
l[x].changeset() # force reading
else:
l[x] = 1
for x in xrange(chunk-1, -1, -1):
if l[x] != 0:
yield (i + x, full != None and l[x] or None)
if i == 0:
break
# calculate and return the reachability bitmask for sha
def is_reachable(ar, reachable, sha):
if len(ar) == 0:
return 1
mask = 0
for i in xrange(len(ar)):
if sha in reachable[i]:
mask |= 1 << i
return mask
reachable = []
stop_sha1 = []
want_sha1 = []
count = 0
# figure out which commits they are asking for and which ones they
# want us to stop on
for i in xrange(len(args)):
if args[i].startswith('^'):
s = repo.lookup(args[i][1:])
stop_sha1.append(s)
want_sha1.append(s)
elif args[i] != 'HEAD':
want_sha1.append(repo.lookup(args[i]))
# calculate the graph for the supplied commits
for i in xrange(len(want_sha1)):
reachable.append({});
n = want_sha1[i];
visit = [n];
reachable[i][n] = 1
while visit:
n = visit.pop(0)
if n in stop_sha1:
continue
for p in repo.changelog.parents(n):
if p not in reachable[i]:
reachable[i][p] = 1
visit.append(p)
if p in stop_sha1:
continue
# walk the repository looking for commits that are in our
# reachability graph
for i, ctx in chlogwalk():
n = repo.changelog.node(i)
mask = is_reachable(want_sha1, reachable, n)
if mask:
parentstr = ""
if parents:
pp = repo.changelog.parents(n)
if pp[0] != nullid:
parentstr += " " + short(pp[0])
if pp[1] != nullid:
parentstr += " " + short(pp[1])
if not full:
ui.write("%s%s\n" % (short(n), parentstr))
elif full == "commit":
ui.write("%s%s\n" % (short(n), parentstr))
catcommit(ui, repo, n, ' ', ctx)
else:
(p1, p2) = repo.changelog.parents(n)
(h, h1, h2) = map(short, (n, p1, p2))
(i1, i2) = map(repo.changelog.rev, (p1, p2))
date = ctx.date()[0]
ui.write("%s %s:%s" % (date, h, mask))
mask = is_reachable(want_sha1, reachable, p1)
if i1 != nullrev and mask > 0:
ui.write("%s:%s " % (h1, mask)),
mask = is_reachable(want_sha1, reachable, p2)
if i2 != nullrev and mask > 0:
ui.write("%s:%s " % (h2, mask))
ui.write("\n")
if maxnr and count >= maxnr:
break
count += 1
def revparse(ui, repo, *revs, **opts):
"""Parse given revisions"""
def revstr(rev):
if rev == 'HEAD':
rev = 'tip'
return revlog.hex(repo.lookup(rev))
for r in revs:
revrange = r.split(':', 1)
ui.write('%s\n' % revstr(revrange[0]))
if len(revrange) == 2:
ui.write('^%s\n' % revstr(revrange[1]))
# git rev-list tries to order things by date, and has the ability to stop
# at a given commit without walking the whole repo. TODO add the stop
# parameter
def revlist(ui, repo, *revs, **opts):
"""print revisions"""
if opts['header']:
full = "commit"
else:
full = None
copy = [x for x in revs]
revtree(ui, copy, repo, full, opts['max_count'], opts['parents'])
def config(ui, repo, **opts):
"""print extension options"""
def writeopt(name, value):
ui.write('k=%s\nv=%s\n' % (name, value))
writeopt('vdiff', ui.config('hgk', 'vdiff', ''))
def view(ui, repo, *etc, **opts):
"start interactive history viewer"
os.chdir(repo.root)
optstr = ' '.join(['--%s %s' % (k, v) for k, v in opts.iteritems() if v])
cmd = ui.config("hgk", "path", "hgk") + " %s %s" % (optstr, " ".join(etc))
ui.debug("running %s\n" % cmd)
util.system(cmd)
cmdtable = {
"^view":
(view,
[('l', 'limit', '', 'limit number of changes displayed')],
'hg view [-l LIMIT] [REVRANGE]'),
"debug-diff-tree":
(difftree,
[('p', 'patch', None, 'generate patch'),
('r', 'recursive', None, 'recursive'),
('P', 'pretty', None, 'pretty'),
('s', 'stdin', None, 'stdin'),
('C', 'copy', None, 'detect copies'),
('S', 'search', "", 'search')],
'hg git-diff-tree [OPTION]... NODE1 NODE2 [FILE]...'),
"debug-cat-file":
(catfile,
[('s', 'stdin', None, 'stdin')],
'hg debug-cat-file [OPTION]... TYPE FILE'),
"debug-config":
(config, [], 'hg debug-config'),
"debug-merge-base":
(base, [], 'hg debug-merge-base node node'),
"debug-rev-parse":
(revparse,
[('', 'default', '', 'ignored')],
'hg debug-rev-parse REV'),
"debug-rev-list":
(revlist,
[('H', 'header', None, 'header'),
('t', 'topo-order', None, 'topo-order'),
('p', 'parents', None, 'parents'),
('n', 'max-count', 0, 'max-count')],
'hg debug-rev-list [options] revs'),
}