360 

   361 @command('debugdag',

   362     [('t', 'tags', None, _('use tags as labels')),

   363     ('b', 'branches', None, _('annotate with branch names')),

   364     ('', 'dots', None, _('use dots for runs')),

   365     ('s', 'spaces', None, _('separate elements by spaces'))],

   366     _('[OPTION]... [FILE [REV]...]'),

   367     optionalrepo=True)

   368 def debugdag(ui, repo, file_=None, *revs, **opts):

   369     """format the changelog or an index DAG as a concise textual description

   370 

   371     If you pass a revlog index, the revlog's DAG is emitted. If you list

   372     revision numbers, they get labeled in the output as rN.

   373 

   374     Otherwise, the changelog DAG of the current repo is emitted.

   375     """

   376     spaces = opts.get('spaces')

   377     dots = opts.get('dots')

   378     if file_:

   379         rlog = revlog.revlog(scmutil.opener(os.getcwd(), audit=False), file_)

   380         revs = set((int(r) for r in revs))

   381         def events():

   382             for r in rlog:

   383                 yield 'n', (r, list(p for p in rlog.parentrevs(r)

   384                                         if p != -1))

   385                 if r in revs:

   386                     yield 'l', (r, "r%i" % r)

   387     elif repo:

   388         cl = repo.changelog

   389         tags = opts.get('tags')

   390         branches = opts.get('branches')

   391         if tags:

   392             labels = {}

   393             for l, n in repo.tags().items():

   394                 labels.setdefault(cl.rev(n), []).append(l)

   395         def events():

   396             b = "default"

   397             for r in cl:

   398                 if branches:

   399                     newb = cl.read(cl.node(r))[5]['branch']

   400                     if newb != b:

   401                         yield 'a', newb

   402                         b = newb

   403                 yield 'n', (r, list(p for p in cl.parentrevs(r)

   404                                         if p != -1))

   405                 if tags:

   406                     ls = labels.get(r)

   407                     if ls:

   408                         for l in ls:

   409                             yield 'l', (r, l)

   410     else:

   411         raise error.Abort(_('need repo for changelog dag'))

   412 

   413     for line in dagparser.dagtextlines(events(),

   414                                        addspaces=spaces,

   415                                        wraplabels=True,

   416                                        wrapannotations=True,

   417                                        wrapnonlinear=dots,

   418                                        usedots=dots,

   419                                        maxlinewidth=70):

   420         ui.write(line)

   421         ui.write("\n")