diff mercurial/cmdutil.py @ 27216:8117e2cd959e

graphlog: make node symbol templatable by ui.graphnodetemplate option

New ui.graphnodetemplate option allows us to colorize a node symbol by phase
or branch,

  [ui]
  graphnodetemplate = {label('graphnode.{phase}', graphnode)}
  [color]
  graphnode.draft = yellow bold

or use a variety of unicode emoji characters, and so on. (You'll need less-481
to display non-BMP unicode character.)

  [ui]
  graphnodetemplate = {ifeq(obsolete, 'stable', graphnode, '\xf0\x9f\x92\xa9')}

--- a/mercurial/cmdutil.py	Sat Nov 14 17:02:57 2015 +0900
+++ b/mercurial/cmdutil.py	Sat Nov 14 17:25:43 2015 +0900
@@ -2159,11 +2159,31 @@
 
     return revs, expr, filematcher
 
+def _graphnodeformatter(ui, displayer):
+    spec = ui.config('ui', 'graphnodetemplate')
+    if not spec:
+        return templatekw.showgraphnode  # fast path for "{graphnode}"
+
+    templ = formatter.gettemplater(ui, 'graphnode', spec)
+    cache = {}
+    if isinstance(displayer, changeset_templater):
+        cache = displayer.cache  # reuse cache of slow templates
+    props = templatekw.keywords.copy()
+    props['templ'] = templ
+    props['cache'] = cache
+    def formatnode(repo, ctx):
+        props['ctx'] = ctx
+        props['repo'] = repo
+        props['revcache'] = {}
+        return templater.stringify(templ('graphnode', **props))
+    return formatnode
+
 def displaygraph(ui, repo, dag, displayer, edgefn, getrenamed=None,
                  filematcher=None):
+    formatnode = _graphnodeformatter(ui, displayer)
     seen, state = [], graphmod.asciistate()
     for rev, type, ctx, parents in dag:
-        char = templatekw.showgraphnode(repo, ctx)
+        char = formatnode(repo, ctx)
         copies = None
         if getrenamed and ctx.rev():
             copies = []