contrib/hgit
author Thomas Arendsen Hein <thomas@intevation.de>
Wed, 10 Aug 2005 06:47:46 +0100
changeset 862 d70c1c31fd45
parent 740 d2422f10c136
child 1239 29f17e083e84
permissions -rwxr-xr-x
Fix 3-way-merge of original parent, workdir and new parent. The dirstate has to match what is in the repository (what would be checked out with 'hg update -C'), because the resulting file may be identical to the new parent, or it may be completely different. Previously the dirstate wasn't updated, so if you changed the file to look like the original parent, it might be considered unmodified relative to the new parent.
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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)