# Revision graph generator for Mercurial
#
# Copyright 2008 Dirkjan Ochtman <dirkjan@ochtman.nl>
# 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.
"""supports walking the history as DAGs suitable for graphical output
The most basic format we use is that of::
(id, type, data, [parentids])
The node and parent ids are arbitrary integers which identify a node in the
context of the graph returned. Type is a constant specifying the node type.
Data depends on type.
"""
from mercurial.node import nullrev
import util
CHANGESET = 'C'
def dagwalker(repo, revs):
"""cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples
This generator function walks through revisions (which should be ordered
from bigger to lower). It returns a tuple for each node. The node and parent
ids are arbitrary integers which identify a node in the context of the graph
returned.
"""
if not revs:
return
cl = repo.changelog
lowestrev = min(revs)
gpcache = {}
knownrevs = set(revs)
for rev in revs:
ctx = repo[rev]
parents = sorted(set([p.rev() for p in ctx.parents()
if p.rev() in knownrevs]))
mpars = [p.rev() for p in ctx.parents() if
p.rev() != nullrev and p.rev() not in parents]
for mpar in mpars:
gp = gpcache.get(mpar)
if gp is None:
gp = gpcache[mpar] = grandparent(cl, lowestrev, revs, mpar)
if not gp:
parents.append(mpar)
else:
parents.extend(g for g in gp if g not in parents)
yield (ctx.rev(), CHANGESET, ctx, parents)
def nodes(repo, nodes):
"""cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples
This generator function walks the given nodes. It only returns parents
that are in nodes, too.
"""
include = set(nodes)
for node in nodes:
ctx = repo[node]
parents = set([p.rev() for p in ctx.parents() if p.node() in include])
yield (ctx.rev(), CHANGESET, ctx, sorted(parents))
def colored(dag, repo):
"""annotates a DAG with colored edge information
For each DAG node this function emits tuples::
(id, type, data, (col, color), [(col, nextcol, color)])
with the following new elements:
- Tuple (col, color) with column and color index for the current node
- A list of tuples indicating the edges between the current node and its
parents.
"""
seen = []
colors = {}
newcolor = 1
config = {}
for key, val in repo.ui.configitems('graph'):
if '.' in key:
branch, setting = key.rsplit('.', 1)
# Validation
if setting == "width" and val.isdigit():
config.setdefault(branch, {})[setting] = int(val)
elif setting == "color" and val.isalnum():
config.setdefault(branch, {})[setting] = val
if config:
getconf = util.lrucachefunc(
lambda rev: config.get(repo[rev].branch(), {}))
else:
getconf = lambda rev: {}
for (cur, type, data, parents) in dag:
# Compute seen and next
if cur not in seen:
seen.append(cur) # new head
colors[cur] = newcolor
newcolor += 1
col = seen.index(cur)
color = colors.pop(cur)
next = seen[:]
# Add parents to next
addparents = [p for p in parents if p not in next]
next[col:col + 1] = addparents
# Set colors for the parents
for i, p in enumerate(addparents):
if not i:
colors[p] = color
else:
colors[p] = newcolor
newcolor += 1
# Add edges to the graph
edges = []
for ecol, eid in enumerate(seen):
if eid in next:
bconf = getconf(eid)
edges.append((
ecol, next.index(eid), colors[eid],
bconf.get('width', -1),
bconf.get('color', '')))
elif eid == cur:
for p in parents:
bconf = getconf(p)
edges.append((
ecol, next.index(p), color,
bconf.get('width', -1),
bconf.get('color', '')))
# Yield and move on
yield (cur, type, data, (col, color), edges)
seen = next
def grandparent(cl, lowestrev, roots, head):
"""Return all ancestors of head in roots which revision is
greater or equal to lowestrev.
"""
pending = set([head])
seen = set()
kept = set()
llowestrev = max(nullrev, lowestrev)
while pending:
r = pending.pop()
if r >= llowestrev and r not in seen:
if r in roots:
kept.add(r)
else:
pending.update([p for p in cl.parentrevs(r)])
seen.add(r)
return sorted(kept)
def asciiedges(type, char, lines, 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)
nextseen = seen[:]
nextseen[nodeidx:nodeidx + 1] = newparents
edges = [(nodeidx, nextseen.index(p)) for p in knownparents if p != nullrev]
while len(newparents) > 2:
# ascii() only knows how to add or remove a single column between two
# calls. Nodes with more than two parents break this constraint so we
# introduce intermediate expansion lines to grow the active node list
# slowly.
edges.append((nodeidx, nodeidx))
edges.append((nodeidx, nodeidx + 1))
nmorecols = 1
yield (type, char, lines, (nodeidx, edges, ncols, nmorecols))
char = '\\'
lines = []
nodeidx += 1
ncols += 1
edges = []
del newparents[0]
if len(newparents) > 0:
edges.append((nodeidx, nodeidx))
if len(newparents) > 1:
edges.append((nodeidx, nodeidx + 1))
nmorecols = len(nextseen) - ncols
seen[:] = nextseen
yield (type, char, lines, (nodeidx, edges, ncols, nmorecols))
def _fixlongrightedges(edges):
for (i, (start, end)) in enumerate(edges):
if end > start:
edges[i] = (start, end + 1)
def _getnodelineedgestail(
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 _drawedges(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:
if 2 * end >= len(nodeline):
continue
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 _getpaddingline(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, usually 'C' for changesets.
- 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 / |/ /
# | | | |
_fixlongrightedges(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(
_getnodelineedgestail(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
_drawedges(edges, nodeline, shift_interline)
# lines is the list of all graph lines to print
lines = [nodeline]
if add_padding_line:
lines.append(_getpaddingline(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