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