[PATCH] obsfate: makes successorsetverb takes the markers as argument

[Boris Feld]

# HG changeset patch
# User Boris Feld <boris.feld at octobus.net>
# Date 1508409347 -7200
#      Thu Oct 19 12:35:47 2017 +0200
# Node ID b5b9f31a676701ca272c10fc2630e4587413e4e7
# Parent  3ce0e4b51f789eff195ec900a07c1fa5e8d5c5f2
# EXP-Topic fix-obsfate
# Available At https://bitbucket.org/octobus/mercurial-devel/
#              hg pull https://bitbucket.org/octobus/mercurial-devel/ -r b5b9f31a6767
obsfate: makes successorsetverb takes the markers as argument

Right now, successorsetverb only needs successors to compute the verb. But we
will want use additional information (effect-flags and operation) in the near
future to compute a better verb.

Add the markers parameter now so extensions (like Evolve) could wrap the
function and start experimenting around better obsfate verbs.

As successorsetverb now takes both successorset and markers parameters, rename
it to obsfateverb, successorsetandmarkersverb was too long.

Differential Revision: https://phab.mercurial-scm.org/D1191

diff --git a/mercurial/obsutil.py b/mercurial/obsutil.py
--- a/mercurial/obsutil.py
+++ b/mercurial/obsutil.py
@@ -751,8 +751,9 @@ def successorsandmarkers(repo, ctx):
 
     return values
 
-def successorsetverb(successorset):
-    """ Return the verb summarizing the successorset
+def obsfateverb(successorset, markers):
+    """ Return the verb summarizing the successorset and potentially using
+    information from the markers
     """
     if not successorset:
         verb = 'pruned'
@@ -795,7 +796,7 @@ def obsfateprinter(successors, markers, 
     line = []
 
     # Verb
-    line.append(successorsetverb(successors))
+    line.append(obsfateverb(successors, markers))
 
     # Operations
     operations = markersoperations(markers)
diff --git a/mercurial/templater.py b/mercurial/templater.py
--- a/mercurial/templater.py
+++ b/mercurial/templater.py
@@ -1005,17 +1005,18 @@ def obsfateusers(context, mapping, args)
                 "obsmakers")
         raise error.ParseError(msg)
 
- at templatefunc('obsfateverb(successors)')
+ at templatefunc('obsfateverb(successors, markers)')
 def obsfateverb(context, mapping, args):
     """Compute obsfate related information based on successors (EXPERIMENTAL)"""
-    if len(args) != 1:
+    if len(args) != 2:
         # i18n: "obsfateverb" is a keyword
-        raise error.ParseError(_("obsfateverb expects one arguments"))
+        raise error.ParseError(_("obsfateverb expects two arguments"))
 
     successors = evalfuncarg(context, mapping, args[0])
+    markers = evalfuncarg(context, mapping, args[1])
 
     try:
-        return obsutil.successorsetverb(successors)
+        return obsutil.obsfateverb(successors, markers)
     except TypeError:
         # i18n: "obsfateverb" is a keyword
         errmsg = _("obsfateverb first argument should be countable")
diff --git a/tests/test-obsmarker-template.t b/tests/test-obsmarker-template.t
--- a/tests/test-obsmarker-template.t
+++ b/tests/test-obsmarker-template.t
@@ -13,7 +13,7 @@ Global setup
   > evolution=true
   > [templates]
   > obsfatesuccessors = "{if(successors, " as ")}{join(successors, ", ")}"
-  > obsfateverb = "{obsfateverb(successors)}"
+  > obsfateverb = "{obsfateverb(successors, markers)}"
   > obsfateoperations = "{if(obsfateoperations(markers), " using {join(obsfateoperations(markers), ", ")}")}"
   > obsfateusers = "{if(obsfateusers(markers), " by {join(obsfateusers(markers), ", ")}")}"
   > obsfatedate = "{if(obsfatedate(markers), "{ifeq(min(obsfatedate(markers)), max(obsfatedate(markers)), " (at {min(obsfatedate(markers))|isodate})", " (between {min(obsfatedate(markers))|isodate} and {max(obsfatedate(markers))|isodate})")}")}"