histedit: add addhisteditaction decorator

This decorator will is allowing us to move the registering the action
in actiontable closer to the action code. Also it is storing the
verb inside histedit action so the action is aware of the verb
needed to trigger it.

hgext/histedit.py

@@ -544,6 +544,20 b' def abortdirty():'
             '--continue, or abort with histedit --abort'))
 
 
+actiontable = {}
+actionlist = []
+
+def addhisteditaction(verbs):
+    def wrap(cls):
+        cls.verb = verbs[0]
+        for verb in verbs:
+            actiontable[verb] = cls
+        actionlist.append(cls)
+        return cls
+    return wrap
+
+
+@addhisteditaction(['pick', 'p'])
 class pick(histeditaction):
     def run(self):
         rulectx = self.repo[self.node]
@@ -553,6 +567,7 b' class pick(histeditaction):'
 
         return super(pick, self).run()
 
+@addhisteditaction(['edit', 'e'])
 class edit(histeditaction):
     def run(self):
         repo = self.repo
@@ -567,6 +582,7 b' class edit(histeditaction):'
     def commiteditor(self):
         return cmdutil.getcommiteditor(edit=True, editform='histedit.edit')
 
+@addhisteditaction(['fold', 'f'])
 class fold(histeditaction):
     def continuedirty(self):
         repo = self.repo
@@ -677,6 +693,7 b' class base(histeditaction):'
         basectx = self.repo['.']
         return basectx, []
 
+@addhisteditaction(['_multifold'])
 class _multifold(fold):
     """fold subclass used for when multiple folds happen in a row
 
@@ -689,6 +706,7 b' class _multifold(fold):'
     def skipprompt(self):
         return True
 
+@addhisteditaction(["roll", "r"])
 class rollup(fold):
     def mergedescs(self):
         return False
@@ -696,11 +714,13 b' class rollup(fold):'
     def skipprompt(self):
         return True
 
+@addhisteditaction(["drop", "d"])
 class drop(histeditaction):
     def run(self):
         parentctx = self.repo[self.state.parentctxnode]
         return parentctx, [(self.node, tuple())]
 
+@addhisteditaction(["mess", "m"])
 class message(histeditaction):
     def commiteditor(self):
         return cmdutil.getcommiteditor(edit=True, editform='histedit.mess')
@@ -731,20 +751,6 b' def findoutgoing(ui, repo, remote=None, '
         raise error.Abort(msg, hint=hint)
     return repo.lookup(roots[0])
 
-actiontable = {'p': pick,
-               'pick': pick,
-               'e': edit,
-               'edit': edit,
-               'f': fold,
-               'fold': fold,
-               '_multifold': _multifold,
-               'r': rollup,
-               'roll': rollup,
-               'd': drop,
-               'drop': drop,
-               'm': message,
-               'mess': message,
-               }
 
 @command('histedit',
     [('', 'commands', '',
@@ -1379,4 +1385,4 b' def extsetup(ui):'
         ['histedit-state', False, True, _('histedit in progress'),
          _("use 'hg histedit --continue' or 'hg histedit --abort'")])
     if ui.configbool("experimental", "histeditng"):
-        actiontable.update({'b': base, 'base': base})
+        globals()['base'] = addhisteditaction(['base', 'b'])(base)