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"""
Modified mercurial DAG graph functions that re-uses VCS structure
It allows to have a shared codebase for DAG generation for hg and git repos
"""
nullrev = -1
def grandparent(parentrev_func, 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 parentrev_func(r)])
seen.add(r)
return sorted(kept)
def _dagwalker(repo, revs, alias):
if not revs:
return
if alias == 'hg':
cl = repo._repo.changelog.parentrevs
repo = repo
elif alias == 'git':
def cl(rev):
return [x.revision for x in repo[rev].parents()]
repo = repo
lowestrev = min(revs)
gpcache = {}
knownrevs = set(revs)
for rev in revs:
ctx = repo[rev]
parents = sorted(set([p.revision for p in ctx.parents
if p.revision in knownrevs]))
mpars = [p.revision for p in ctx.parents if
p.revision != nullrev and p.revision 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.revision, 'C', ctx, parents)
def _colored(dag):
"""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
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
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