# 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, incorporated herein by reference.
'''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, sys
from mercurial.cmdutil import revrange, show_changeset
from mercurial.commands import templateopts
from mercurial.i18n import _
from mercurial.node import nullrev
from mercurial import bundlerepo, changegroup, cmdutil, commands, extensions
from mercurial import hg, url, util, graphmod
ASCIIDATA = 'ASC'
def asciiformat(ui, repo, revdag, opts, parentrepo=None):
"""formats a changelog DAG walk for ASCII output"""
if parentrepo is None:
parentrepo = repo
showparents = [ctx.node() for ctx in parentrepo[None].parents()]
displayer = show_changeset(ui, repo, opts, buffered=True)
for (id, type, ctx, parentids) in revdag:
if type != graphmod.CHANGESET:
continue
displayer.show(ctx)
lines = displayer.hunk.pop(ctx.rev()).split('\n')[:-1]
char = ctx.node() in showparents and '@' or 'o'
yield (id, ASCIIDATA, (char, lines), parentids)
def asciiedges(nodes):
"""adds edge info to changelog DAG walk suitable for ascii()"""
seen = []
for node, type, data, parents in nodes:
if node not in seen:
seen.append(node)
nodeidx = seen.index(node)
knownparents = []
newparents = []
for parent in parents:
if parent in seen:
knownparents.append(parent)
else:
newparents.append(parent)
ncols = len(seen)
nextseen = seen[:]
nextseen[nodeidx:nodeidx + 1] = newparents
edges = [(nodeidx, nextseen.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(nextseen) - ncols
seen = nextseen
yield (nodeidx, type, data, 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 ascii(ui, dag):
"""prints an ASCII graph of the DAG
dag is a generator that emits tuples with the following elements:
- 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.
"""
prev_n_columns_diff = 0
prev_node_index = 0
for (node_index, type, (node_ch, node_lines), edges, n_columns, n_columns_diff) in dag:
assert -2 < n_columns_diff < 2
if n_columns_diff == -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(node_lines) > 2 and
n_columns_diff == -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(node_lines) <= 2 and not add_padding_line
# nodeline is the line containing the node character (typically o)
nodeline = ["|", " "] * node_index
nodeline.extend([node_ch, " "])
nodeline.extend(
get_nodeline_edges_tail(
node_index, prev_node_index, n_columns, n_columns_diff,
prev_n_columns_diff, fix_nodeline_tail))
# shift_interline is the line containing the non-vertical
# edges between this entry and the next
shift_interline = ["|", " "] * node_index
if n_columns_diff == -1:
n_spaces = 1
edge_ch = "/"
elif n_columns_diff == 0:
n_spaces = 2
edge_ch = "|"
else:
n_spaces = 3
edge_ch = "\\"
shift_interline.extend(n_spaces * [" "])
shift_interline.extend([edge_ch, " "] * (n_columns - node_index - 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(node_index, n_columns, edges))
lines.append(shift_interline)
# make sure that there are as many graph lines as there are
# log strings
while len(node_lines) < len(lines):
node_lines.append("")
if len(lines) < len(node_lines):
extra_interline = ["|", " "] * (n_columns + n_columns_diff)
while len(lines) < len(node_lines):
lines.append(extra_interline)
# print lines
indentation_level = max(n_columns, n_columns + n_columns_diff)
for (line, logstr) in zip(lines, node_lines):
ln = "%-*s %s" % (2 * indentation_level, "".join(line), logstr)
ui.write(ln.rstrip() + '\n')
# ... and start over
prev_node_index = node_index
prev_n_columns_diff = n_columns_diff
def get_revs(repo, rev_opt):
if rev_opt:
revs = revrange(repo, rev_opt)
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", "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)
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"])
stop = max(stop, start - limit + 1)
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)
else:
revdag = graphmod.revisions(repo, start, stop)
fmtdag = asciiformat(ui, repo, revdag, opts)
ascii(ui, asciiedges(fmtdag))
def graphrevs(repo, nodes, opts):
limit = cmdutil.loglimit(opts)
nodes.reverse()
if limit < sys.maxint:
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)
dest, revs, checkout = hg.parseurl(
ui.expandpath(dest or 'default-push', dest or 'default'),
opts.get('rev'))
if revs:
revs = [repo.lookup(rev) for rev in revs]
other = hg.repository(cmdutil.remoteui(ui, opts), dest)
ui.status(_('comparing with %s\n') % url.hidepassword(dest))
o = repo.findoutgoing(other, force=opts.get('force'))
if not o:
ui.status(_("no changes found\n"))
return
o = repo.changelog.nodesbetween(o, revs)[0]
revdag = graphrevs(repo, o, opts)
fmtdag = asciiformat(ui, repo, revdag, opts)
ascii(ui, asciiedges(fmtdag))
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.
"""
check_unsupported_flags(opts)
source, revs, checkout = hg.parseurl(ui.expandpath(source), opts.get('rev'))
other = hg.repository(cmdutil.remoteui(repo, opts), source)
ui.status(_('comparing with %s\n') % url.hidepassword(source))
if revs:
revs = [other.lookup(rev) for rev in revs]
incoming = repo.findincoming(other, heads=revs, force=opts["force"])
if not incoming:
try:
os.unlink(opts["bundle"])
except:
pass
ui.status(_("no changes found\n"))
return
cleanup = None
try:
fname = opts["bundle"]
if fname or not other.local():
# create a bundle (uncompressed if other repo is not local)
if revs is None:
cg = other.changegroup(incoming, "incoming")
else:
cg = other.changegroupsubset(incoming, revs, 'incoming')
bundletype = other.local() and "HG10BZ" or "HG10UN"
fname = cleanup = changegroup.writebundle(cg, fname, bundletype)
# keep written bundle?
if opts["bundle"]:
cleanup = None
if not other.local():
# use the created uncompressed bundlerepo
other = bundlerepo.bundlerepository(ui, repo.root, fname)
chlist = other.changelog.nodesbetween(incoming, revs)[0]
revdag = graphrevs(other, chlist, opts)
fmtdag = asciiformat(ui, other, revdag, opts, parentrepo=repo)
ascii(ui, asciiedges(fmtdag))
finally:
if hasattr(other, 'close'):
other.close()
if cleanup:
os.unlink(cleanup)
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')),
('p', 'patch', False, _('show patch')),
('r', 'rev', [], _('show the specified revision or range')),
] + templateopts,
_('hg glog [OPTION]... [FILE]')),
}