--- a/mercurial/debugcommands.py Sat Oct 15 14:30:16 2016 +0900
+++ b/mercurial/debugcommands.py Wed Aug 17 20:41:54 2016 -0700
@@ -357,3 +357,65 @@
if ui.verbose:
cmdlist = [' '.join(c[0]) for c in cmdlist.values()]
ui.write("%s\n" % "\n".join(sorted(cmdlist)))
+
+@command('debugdag',
+ [('t', 'tags', None, _('use tags as labels')),
+ ('b', 'branches', None, _('annotate with branch names')),
+ ('', 'dots', None, _('use dots for runs')),
+ ('s', 'spaces', None, _('separate elements by spaces'))],
+ _('[OPTION]... [FILE [REV]...]'),
+ optionalrepo=True)
+def debugdag(ui, repo, file_=None, *revs, **opts):
+ """format the changelog or an index DAG as a concise textual description
+
+ If you pass a revlog index, the revlog's DAG is emitted. If you list
+ revision numbers, they get labeled in the output as rN.
+
+ Otherwise, the changelog DAG of the current repo is emitted.
+ """
+ spaces = opts.get('spaces')
+ dots = opts.get('dots')
+ if file_:
+ rlog = revlog.revlog(scmutil.opener(os.getcwd(), audit=False), file_)
+ revs = set((int(r) for r in revs))
+ def events():
+ for r in rlog:
+ yield 'n', (r, list(p for p in rlog.parentrevs(r)
+ if p != -1))
+ if r in revs:
+ yield 'l', (r, "r%i" % r)
+ elif repo:
+ cl = repo.changelog
+ tags = opts.get('tags')
+ branches = opts.get('branches')
+ if tags:
+ labels = {}
+ for l, n in repo.tags().items():
+ labels.setdefault(cl.rev(n), []).append(l)
+ def events():
+ b = "default"
+ for r in cl:
+ if branches:
+ newb = cl.read(cl.node(r))[5]['branch']
+ if newb != b:
+ yield 'a', newb
+ b = newb
+ yield 'n', (r, list(p for p in cl.parentrevs(r)
+ if p != -1))
+ if tags:
+ ls = labels.get(r)
+ if ls:
+ for l in ls:
+ yield 'l', (r, l)
+ else:
+ raise error.Abort(_('need repo for changelog dag'))
+
+ for line in dagparser.dagtextlines(events(),
+ addspaces=spaces,
+ wraplabels=True,
+ wrapannotations=True,
+ wrapnonlinear=dots,
+ usedots=dots,
+ maxlinewidth=70):
+ ui.write(line)
+ ui.write("\n")