contrib/hgit
author mpm@selenic.com
Sat, 20 Aug 2005 13:08:07 -0700
changeset 981 4f81068ed8cd
parent 740 d2422f10c136
child 1239 29f17e083e84
permissions -rwxr-xr-x
Merge with jeffpc
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#!/usr/bin/env python
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#
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# Minimal support for git commands on an hg repository
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#
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# Copyright 2005 Chris Mason <mason@suse.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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import time, sys, signal
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from mercurial import hg, mdiff, fancyopts, commands, ui
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def difftree(args, ui, repo):
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    def __difftree(repo, files = None, node1 = None, node2 = None):
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        def date(c):
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            return time.asctime(time.gmtime(float(c[2].split(' ')[0])))
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        if node2:
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            change = repo.changelog.read(node2)
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            mmap2 = repo.manifest.read(change[0])
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            (c, a, d, u) = repo.changes(node1, node2)
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            def read(f): return repo.file(f).read(mmap2[f])
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            date2 = date(change)
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        else:
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            date2 = time.asctime()
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            (c, a, d, u) = repo.diffdir(repo.root, node1)
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            if not node1:
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                node1 = repo.dirstate.parents()[0]
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            def read(f): return file(os.path.join(repo.root, f)).read()
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        change = repo.changelog.read(node1)
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        mmap = repo.manifest.read(change[0])
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        date1 = date(change)
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        empty = "0" * 40;
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        if files:
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            c, a, d = map(lambda x: filterfiles(files, x), (c, a, d))
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        for f in c:
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            # TODO get file permissions
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            print ":100664 100664 %s %s M\t%s\t%s" % (hg.hex(mmap[f]), 
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                                                      hg.hex(mmap2[f]), f, f)
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        for f in a:
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            print ":000000 100664 %s %s N\t%s\t%s" % (empty, hg.hex(mmap2[f]), f, f)
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        for f in d:
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            print ":100664 000000 %s %s D\t%s\t%s" % (hg.hex(mmap[f]), empty, f, f)
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    ##
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    revs = []
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    if args:
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        doptions = {}
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        opts = [('p', 'patch', None, 'patch'),
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                ('r', 'recursive', None, 'recursive')]
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        args = fancyopts.fancyopts(args, opts, doptions)
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    if len(args) < 2:
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        help()
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        sys.exit(1)
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    revs.append(repo.lookup(args[0]))
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    revs.append(repo.lookup(args[1]))
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    args = args[2:]
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    if doptions['patch']:
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        commands.dodiff(sys.stdout, ui, repo, args, *revs)
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    else:
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        __difftree(repo, args, *revs)
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def catcommit(repo, n, prefix):
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    nlprefix = '\n' + prefix;
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    changes = repo.changelog.read(n)
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    (p1, p2) = repo.changelog.parents(n)
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    (h, h1, h2) = map(hg.hex, (n, p1, p2))
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    (i1, i2) = map(repo.changelog.rev, (p1, p2))
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    print "tree %s" % (h)
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    if i1 != -1: print "%sparent %s" % (prefix, h1)
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    if i2 != -1: print "%sparent %s" % (prefix, h2)
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    date_ar = changes[2].split(' ')
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    date = int(float(date_ar[0]))
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    print "%sauthor <%s> %s %s" % (prefix, changes[1], date, date_ar[1])
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    print "%scommitter <%s> %s %s" % (prefix, changes[1], date, date_ar[1])
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    print prefix
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    if prefix != "":
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        print "%s%s" % (prefix, changes[4].replace('\n', nlprefix).strip())
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    else:
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        print changes[4]
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def catfile(args, ui, repo):
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    doptions = {}
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    opts = [('s', 'stdin', None, 'stdin')]
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    args = fancyopts.fancyopts(args, opts, doptions)
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    # in stdin mode, every line except the commit is prefixed with two
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    # spaces.  This way the our caller can find the commit without magic
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    # strings
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    #
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    prefix = ""
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    if doptions['stdin']:
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        try:
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            (type, r) = raw_input().split(' ');
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            prefix = "  "
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        except EOFError:
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            return
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    else:
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        if len(args) < 2:
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            help()
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            sys.exit(1)
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        type = args[0]
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        r = args[1]
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    while r:
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        if type != "commit":
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            sys.stderr.write("aborting hg cat-file only understands commits\n")
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            sys.exit(1);
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        n = repo.lookup(r)
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        catcommit(repo, n, prefix)
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        if doptions['stdin']:
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            try:
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                (type, r) = raw_input().split(' ');
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            except EOFError:
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                break
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        else:
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            break
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# git rev-tree is a confusing thing.  You can supply a number of
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# commit sha1s on the command line, and it walks the commit history
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# telling you which commits are reachable from the supplied ones via
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# a bitmask based on arg position.
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# you can specify a commit to stop at by starting the sha1 with ^
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def revtree(args, repo, full="tree", maxnr=0):
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    # calculate and return the reachability bitmask for sha
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    def is_reachable(ar, reachable, sha):
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        if len(ar) == 0:
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            return 1
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        mask = 0
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        for i in range(len(ar)):
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            if sha in reachable[i]:
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                mask |= 1 << i
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        return mask
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    reachable = []
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    stop_sha1 = []
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    want_sha1 = []
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    count = 0
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    # figure out which commits they are asking for and which ones they
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    # want us to stop on
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    for i in range(len(args)):
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        if args[i].startswith('^'):
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            s = repo.lookup(args[i][1:])
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            stop_sha1.append(s)
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            want_sha1.append(s)
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        elif args[i] != 'HEAD':
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            want_sha1.append(repo.lookup(args[i]))
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    # calculate the graph for the supplied commits
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    for i in range(len(want_sha1)):
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        reachable.append({});
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        n = want_sha1[i];
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        visit = [n];
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        reachable[i][n] = 1
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        while visit:
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            n = visit.pop(0)
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            if n in stop_sha1:
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                break
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            for p in repo.changelog.parents(n):
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                if p not in reachable[i]:
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                    reachable[i][p] = 1
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                    visit.append(p)
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                if p in stop_sha1:
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                    break
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    # walk the repository looking for commits that are in our
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    # reachability graph
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    for i in range(repo.changelog.count()-1, -1, -1):
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        n = repo.changelog.node(i)
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        mask = is_reachable(want_sha1, reachable, n)
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        if mask:
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            if not full:
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                print hg.hex(n)
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            elif full is "commit":
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                print hg.hex(n)
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                catcommit(repo, n, '  ')
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            else:
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                changes = repo.changelog.read(n)
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                (p1, p2) = repo.changelog.parents(n)
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                (h, h1, h2) = map(hg.hex, (n, p1, p2))
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                (i1, i2) = map(repo.changelog.rev, (p1, p2))
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                date = changes[2].split(' ')[0]
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                print "%s %s:%s" % (date, h, mask),
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                mask = is_reachable(want_sha1, reachable, p1)
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                if i1 != -1 and mask > 0:
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                    print "%s:%s " % (h1, mask),
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                mask = is_reachable(want_sha1, reachable, p2)
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                if i2 != -1 and mask > 0:
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                    print "%s:%s " % (h2, mask),
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                print ""
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            if maxnr and count >= maxnr:
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                break
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            count += 1
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# git rev-list tries to order things by date, and has the ability to stop
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# at a given commit without walking the whole repo.  TODO add the stop
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# parameter
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def revlist(args, repo):
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    doptions = {}
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    opts = [('c', 'commit', None, 'commit'),
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            ('n', 'max-nr', 0, 'max-nr')]
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    args = fancyopts.fancyopts(args, opts, doptions)
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    if doptions['commit']:
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        full = "commit"
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    else:
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        full = None
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    for i in range(1, len(args)):
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        args[i] = '^' + args[i]
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    revtree(args, repo, full, doptions['max-nr'])
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def catchterm(*args):
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    raise SignalInterrupt
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def help():
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    sys.stderr.write("commands:\n")
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    sys.stderr.write("  hgit cat-file [type] sha1\n")
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    sys.stderr.write("  hgit diff-tree [-p] [-r] sha1 sha1\n")
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    sys.stderr.write("  hgit rev-tree [sha1 ... [^stop sha1]]\n")
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    sys.stderr.write("  hgit rev-list [-c] [sha1 [stop sha1]\n")
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cmd = sys.argv[1]
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args = sys.argv[2:]
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u = ui.ui()
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signal.signal(signal.SIGTERM, catchterm)
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repo = hg.repository(ui = u)
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if cmd == "diff-tree":
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    difftree(args, u, repo)
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elif cmd == "cat-file":
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    catfile(args, u, repo)
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elif cmd == "rev-tree":
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    revtree(args, repo)
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elif cmd == "rev-list":
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    revlist(args, repo)
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elif cmd == "help":
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    help()
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else:
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    if cmd: sys.stderr.write("unknown command\n\n")
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    help()
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    sys.exit(1)
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sys.exit(0)