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authorNishanth Amuluru2011-01-11 22:41:51 +0530
committerNishanth Amuluru2011-01-11 22:41:51 +0530
commitb03203c8cb991c16ac8a3d74c8c4078182d0bb48 (patch)
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-# ASCII graph log extension for Mercurial
-#
-# Copyright 2007 Joel Rosdahl <joel@rosdahl.net>
-#
-# This software may be used and distributed according to the terms of the
-# GNU General Public License version 2 or any later version.
-
-'''command to view revision graphs from a shell
-
-This extension adds a --graph option to the incoming, outgoing and log
-commands. When this options is given, an ASCII representation of the
-revision graph is also shown.
-'''
-
-import os
-from mercurial.cmdutil import revrange, show_changeset
-from mercurial.commands import templateopts
-from mercurial.i18n import _
-from mercurial.node import nullrev
-from mercurial import cmdutil, commands, extensions
-from mercurial import hg, util, graphmod
-
-ASCIIDATA = 'ASC'
-
-def asciiedges(seen, rev, parents):
- """adds edge info to changelog DAG walk suitable for ascii()"""
- if rev not in seen:
- seen.append(rev)
- nodeidx = seen.index(rev)
-
- knownparents = []
- newparents = []
- for parent in parents:
- if parent in seen:
- knownparents.append(parent)
- else:
- newparents.append(parent)
-
- ncols = len(seen)
- seen[nodeidx:nodeidx + 1] = newparents
- edges = [(nodeidx, seen.index(p)) for p in knownparents]
-
- if len(newparents) > 0:
- edges.append((nodeidx, nodeidx))
- if len(newparents) > 1:
- edges.append((nodeidx, nodeidx + 1))
-
- nmorecols = len(seen) - ncols
- return nodeidx, edges, ncols, nmorecols
-
-def fix_long_right_edges(edges):
- for (i, (start, end)) in enumerate(edges):
- if end > start:
- edges[i] = (start, end + 1)
-
-def get_nodeline_edges_tail(
- node_index, p_node_index, n_columns, n_columns_diff, p_diff, fix_tail):
- if fix_tail and n_columns_diff == p_diff and n_columns_diff != 0:
- # Still going in the same non-vertical direction.
- if n_columns_diff == -1:
- start = max(node_index + 1, p_node_index)
- tail = ["|", " "] * (start - node_index - 1)
- tail.extend(["/", " "] * (n_columns - start))
- return tail
- else:
- return ["\\", " "] * (n_columns - node_index - 1)
- else:
- return ["|", " "] * (n_columns - node_index - 1)
-
-def draw_edges(edges, nodeline, interline):
- for (start, end) in edges:
- if start == end + 1:
- interline[2 * end + 1] = "/"
- elif start == end - 1:
- interline[2 * start + 1] = "\\"
- elif start == end:
- interline[2 * start] = "|"
- else:
- nodeline[2 * end] = "+"
- if start > end:
- (start, end) = (end, start)
- for i in range(2 * start + 1, 2 * end):
- if nodeline[i] != "+":
- nodeline[i] = "-"
-
-def get_padding_line(ni, n_columns, edges):
- line = []
- line.extend(["|", " "] * ni)
- if (ni, ni - 1) in edges or (ni, ni) in edges:
- # (ni, ni - 1) (ni, ni)
- # | | | | | | | |
- # +---o | | o---+
- # | | c | | c | |
- # | |/ / | |/ /
- # | | | | | |
- c = "|"
- else:
- c = " "
- line.extend([c, " "])
- line.extend(["|", " "] * (n_columns - ni - 1))
- return line
-
-def asciistate():
- """returns the initial value for the "state" argument to ascii()"""
- return [0, 0]
-
-def ascii(ui, state, type, char, text, coldata):
- """prints an ASCII graph of the DAG
-
- takes the following arguments (one call per node in the graph):
-
- - ui to write to
- - Somewhere to keep the needed state in (init to asciistate())
- - Column of the current node in the set of ongoing edges.
- - Type indicator of node data == ASCIIDATA.
- - Payload: (char, lines):
- - Character to use as node's symbol.
- - List of lines to display as the node's text.
- - Edges; a list of (col, next_col) indicating the edges between
- the current node and its parents.
- - Number of columns (ongoing edges) in the current revision.
- - The difference between the number of columns (ongoing edges)
- in the next revision and the number of columns (ongoing edges)
- in the current revision. That is: -1 means one column removed;
- 0 means no columns added or removed; 1 means one column added.
- """
-
- idx, edges, ncols, coldiff = coldata
- assert -2 < coldiff < 2
- if coldiff == -1:
- # Transform
- #
- # | | | | | |
- # o | | into o---+
- # |X / |/ /
- # | | | |
- fix_long_right_edges(edges)
-
- # add_padding_line says whether to rewrite
- #
- # | | | | | | | |
- # | o---+ into | o---+
- # | / / | | | # <--- padding line
- # o | | | / /
- # o | |
- add_padding_line = (len(text) > 2 and coldiff == -1 and
- [x for (x, y) in edges if x + 1 < y])
-
- # fix_nodeline_tail says whether to rewrite
- #
- # | | o | | | | o | |
- # | | |/ / | | |/ /
- # | o | | into | o / / # <--- fixed nodeline tail
- # | |/ / | |/ /
- # o | | o | |
- fix_nodeline_tail = len(text) <= 2 and not add_padding_line
-
- # nodeline is the line containing the node character (typically o)
- nodeline = ["|", " "] * idx
- nodeline.extend([char, " "])
-
- nodeline.extend(
- get_nodeline_edges_tail(idx, state[1], ncols, coldiff,
- state[0], fix_nodeline_tail))
-
- # shift_interline is the line containing the non-vertical
- # edges between this entry and the next
- shift_interline = ["|", " "] * idx
- if coldiff == -1:
- n_spaces = 1
- edge_ch = "/"
- elif coldiff == 0:
- n_spaces = 2
- edge_ch = "|"
- else:
- n_spaces = 3
- edge_ch = "\\"
- shift_interline.extend(n_spaces * [" "])
- shift_interline.extend([edge_ch, " "] * (ncols - idx - 1))
-
- # draw edges from the current node to its parents
- draw_edges(edges, nodeline, shift_interline)
-
- # lines is the list of all graph lines to print
- lines = [nodeline]
- if add_padding_line:
- lines.append(get_padding_line(idx, ncols, edges))
- lines.append(shift_interline)
-
- # make sure that there are as many graph lines as there are
- # log strings
- while len(text) < len(lines):
- text.append("")
- if len(lines) < len(text):
- extra_interline = ["|", " "] * (ncols + coldiff)
- while len(lines) < len(text):
- lines.append(extra_interline)
-
- # print lines
- indentation_level = max(ncols, ncols + coldiff)
- for (line, logstr) in zip(lines, text):
- ln = "%-*s %s" % (2 * indentation_level, "".join(line), logstr)
- ui.write(ln.rstrip() + '\n')
-
- # ... and start over
- state[0] = coldiff
- state[1] = idx
-
-def get_revs(repo, rev_opt):
- if rev_opt:
- revs = revrange(repo, rev_opt)
- if len(revs) == 0:
- return (nullrev, nullrev)
- return (max(revs), min(revs))
- else:
- return (len(repo) - 1, 0)
-
-def check_unsupported_flags(opts):
- for op in ["follow", "follow_first", "date", "copies", "keyword", "remove",
- "only_merges", "user", "branch", "only_branch", "prune",
- "newest_first", "no_merges", "include", "exclude"]:
- if op in opts and opts[op]:
- raise util.Abort(_("--graph option is incompatible with --%s")
- % op.replace("_", "-"))
-
-def generate(ui, dag, displayer, showparents, edgefn):
- seen, state = [], asciistate()
- for rev, type, ctx, parents in dag:
- char = ctx.node() in showparents and '@' or 'o'
- displayer.show(ctx)
- lines = displayer.hunk.pop(rev).split('\n')[:-1]
- displayer.flush(rev)
- ascii(ui, state, type, char, lines, edgefn(seen, rev, parents))
- displayer.close()
-
-def graphlog(ui, repo, path=None, **opts):
- """show revision history alongside an ASCII revision graph
-
- Print a revision history alongside a revision graph drawn with
- ASCII characters.
-
- Nodes printed as an @ character are parents of the working
- directory.
- """
-
- check_unsupported_flags(opts)
- limit = cmdutil.loglimit(opts)
- start, stop = get_revs(repo, opts["rev"])
- if start == nullrev:
- return
-
- if path:
- path = util.canonpath(repo.root, os.getcwd(), path)
- if path: # could be reset in canonpath
- revdag = graphmod.filerevs(repo, path, start, stop, limit)
- else:
- if limit is not None:
- stop = max(stop, start - limit + 1)
- revdag = graphmod.revisions(repo, start, stop)
-
- displayer = show_changeset(ui, repo, opts, buffered=True)
- showparents = [ctx.node() for ctx in repo[None].parents()]
- generate(ui, revdag, displayer, showparents, asciiedges)
-
-def graphrevs(repo, nodes, opts):
- limit = cmdutil.loglimit(opts)
- nodes.reverse()
- if limit is not None:
- nodes = nodes[:limit]
- return graphmod.nodes(repo, nodes)
-
-def goutgoing(ui, repo, dest=None, **opts):
- """show the outgoing changesets alongside an ASCII revision graph
-
- Print the outgoing changesets alongside a revision graph drawn with
- ASCII characters.
-
- Nodes printed as an @ character are parents of the working
- directory.
- """
-
- check_unsupported_flags(opts)
- o = hg._outgoing(ui, repo, dest, opts)
- if o is None:
- return
-
- revdag = graphrevs(repo, o, opts)
- displayer = show_changeset(ui, repo, opts, buffered=True)
- showparents = [ctx.node() for ctx in repo[None].parents()]
- generate(ui, revdag, displayer, showparents, asciiedges)
-
-def gincoming(ui, repo, source="default", **opts):
- """show the incoming changesets alongside an ASCII revision graph
-
- Print the incoming changesets alongside a revision graph drawn with
- ASCII characters.
-
- Nodes printed as an @ character are parents of the working
- directory.
- """
- def subreporecurse():
- return 1
-
- check_unsupported_flags(opts)
- def display(other, chlist, displayer):
- revdag = graphrevs(other, chlist, opts)
- showparents = [ctx.node() for ctx in repo[None].parents()]
- generate(ui, revdag, displayer, showparents, asciiedges)
-
- hg._incoming(display, subreporecurse, ui, repo, source, opts, buffered=True)
-
-def uisetup(ui):
- '''Initialize the extension.'''
- _wrapcmd(ui, 'log', commands.table, graphlog)
- _wrapcmd(ui, 'incoming', commands.table, gincoming)
- _wrapcmd(ui, 'outgoing', commands.table, goutgoing)
-
-def _wrapcmd(ui, cmd, table, wrapfn):
- '''wrap the command'''
- def graph(orig, *args, **kwargs):
- if kwargs['graph']:
- return wrapfn(*args, **kwargs)
- return orig(*args, **kwargs)
- entry = extensions.wrapcommand(table, cmd, graph)
- entry[1].append(('G', 'graph', None, _("show the revision DAG")))
-
-cmdtable = {
- "glog":
- (graphlog,
- [('l', 'limit', '',
- _('limit number of changes displayed'), _('NUM')),
- ('p', 'patch', False, _('show patch')),
- ('r', 'rev', [],
- _('show the specified revision or range'), _('REV')),
- ] + templateopts,
- _('hg glog [OPTION]... [FILE]')),
-}