commit: change "editform" to distinguish merge commits from others

commit: change "editform" to distinguish merge commits from others

"editform" argument for "getcommiteditor" is decided according to the
format below:

  COMMAND[.ROUTE]

  - COMMAND: name of command
  - ROUTE: name of route, if there are two or more routes in COMMAND

This patch uses "normal.normal" and "normal.merge" as ROUTE of
"editform" instead of "normal", to distinguish merge commits from
others in "hg commit" without "--amend" case.

This patch assumes "editform" variations for "hg commit" below:

    commit.normal.normal
    commit.normal.merge
    commit.amend.normal
    commit.amend.merge

"mergeeditform" is factored out for subsequent patches. It takes
"ctxorbool" argument, because context object can't be passed in some
cases.

--- a/mercurial/cmdutil.py	Sat Aug 16 10:19:26 2014 -0700
+++ b/mercurial/cmdutil.py	Sat Aug 16 10:43:59 2014 +0900
@@ -109,6 +109,23 @@
                              (logfile, inst.strerror))
     return message
 
+def mergeeditform(ctxorbool, baseform):
+    """build appropriate editform from ctxorbool and baseform
+
+    'cxtorbool' is one of a ctx to be committed, or a bool whether
+    merging is committed.
+
+    This returns editform 'baseform' with '.merge' if merging is
+    committed, or one with '.normal' suffix otherwise.
+    """
+    if isinstance(ctxorbool, bool):
+        if ctxorbool:
+            return baseform + ".merge"
+    elif 1 < len(ctxorbool.parents()):
+        return baseform + ".merge"
+
+    return baseform + ".normal"
+
 def getcommiteditor(edit=False, finishdesc=None, extramsg=None,
                     editform='', **opts):
     """get appropriate commit message editor according to '--edit' option

--- a/mercurial/commands.py	Sat Aug 16 10:19:26 2014 -0700
+++ b/mercurial/commands.py	Sat Aug 16 10:43:59 2014 +0900
@@ -1448,7 +1448,7 @@
                     # Propagate to subrepos
                     baseui.setconfig('phases', 'new-commit', 'secret', 'commit')
 
-                editform = 'commit.normal'
+                editform = cmdutil.mergeeditform(repo[None], 'commit.normal')
                 editor = cmdutil.getcommiteditor(editform=editform, **opts)
                 return repo.commit(message, opts.get('user'), opts.get('date'),
                                    match,

--- a/mercurial/help/config.txt	Sat Aug 16 10:19:26 2014 -0700
+++ b/mercurial/help/config.txt	Sat Aug 16 10:43:59 2014 +0900
@@ -395,7 +395,8 @@
 
 - ``changeset.backout`` for :hg:`backout`
 - ``changeset.commit.amend`` for :hg:`commit --amend`
-- ``changeset.commit.normal`` for :hg:`commit` without ``--amend``
+- ``changeset.commit.normal.merge`` for :hg:`commit` on merges
+- ``changeset.commit.normal.normal`` for :hg:`commit` on other
 - ``changeset.fetch`` for :hg:`fetch` (impling merge commit)
 - ``changeset.gpg.sign`` for :hg:`sign`
 - ``changeset.graft`` for :hg:`graft`
@@ -422,7 +423,7 @@
 
 At the external editor invocation for committing, corresponding
 dot-separated list of names without ``changeset.`` prefix
-(e.g. ``commit.normal``) is in ``HGEDITFORM`` environment variable.
+(e.g. ``commit.normal.normal``) is in ``HGEDITFORM`` environment variable.
 
 In this section, items other than ``changeset`` can be referred from
 others. For example, the configuration to list committed files up

--- a/tests/test-commit.t	Sat Aug 16 10:19:26 2014 -0700
+++ b/tests/test-commit.t	Sat Aug 16 10:43:59 2014 +0900
@@ -9,7 +9,7 @@
   > true
   > EOF
   $ HGEDITOR="sh $TESTTMP/checkeditform.sh" hg commit -m ""
-  HGEDITFORM=commit.normal
+  HGEDITFORM=commit.normal.normal
   abort: empty commit message
   [255]
   $ hg commit -d '0 0' -m commit-1
@@ -282,7 +282,8 @@
 
 should succeed
 
-  $ hg ci -mmerge
+  $ HGEDITOR="sh $TESTTMP/checkeditform.sh" hg ci -mmerge --edit
+  HGEDITFORM=commit.normal.merge
   $ cd ..