color: move triggering of the initialisation logic in core

We now run the color initialisation as part of the standard dispatch. This is
opening the way for multiple cleanups since we now have access to the multiple 'ui'
object and we'll be able to see difference between global and local config. This
cleanup will arrive in later changesets.

As a side effect, the '--color' flag is now working without the extension.

Since we now properly initialize color for each ui idependently, we get a
warning message twice.

hgext/color.py

@@ -175,9 +175,6 from mercurial import (
     cmdutil,
     color,
     commands,
-    dispatch,
-    extensions,
-    ui as uimod,
 )
 
 cmdtable = {}
@@ -188,15 +185,6 command = cmdutil.command(cmdtable)
 # leave the attribute unspecified.
 testedwith = 'ships-with-hg-core'
 
-def uisetup(ui):
-    def colorcmd(orig, ui_, opts, cmd, cmdfunc):
-        mode = color._modesetup(ui_, opts['color'])
-        uimod.ui._colormode = mode
-        if mode and mode != 'debug':
-            color.configstyles(ui_)
-        return orig(ui_, opts, cmd, cmdfunc)
-    extensions.wrapfunction(dispatch, '_runcommand', colorcmd)
-
 def extsetup(ui):
     # change default color config
     for idx, entry in enumerate(commands.globalopts):

mercurial/color.py

@@ -161,6 +161,17 def _terminfosetup(ui, mode):
               "ECMA-48 color\n"))
         _terminfo_params.clear()
 
+def setup(ui, coloropts):
+    """configure color on a ui
+
+    The 'coloropts' argument is the value of the '--color' command line
+    argument. That function both set the colormode for the ui object and read
+    the configuration looking for custom colors and effect definitions."""
+    mode = _modesetup(ui, coloropts)
+    ui.__class__._colormode = mode
+    if mode and mode != 'debug':
+        configstyles(ui)
+
 def _modesetup(ui, coloropt):
     if ui.plain():
         return None

mercurial/dispatch.py

@@ -764,6 +764,10 def _dispatch(req):
             for ui_ in uis:
                 ui_.insecureconnections = True
 
+        # setup color handling
+        for ui_ in uis:
+            color.setup(ui_, options['color'])
+
         if options['version']:
             return commands.version_(ui)
         if options['help']:

tests/test-status-color.t

@@ -295,6 +295,7 test unknown color
 
   $ hg --config color.status.modified=periwinkle status --color=always
   ignoring unknown color/effect 'periwinkle' (configured in color.status.modified)
+  ignoring unknown color/effect 'periwinkle' (configured in color.status.modified)
   M modified
   \x1b[0;32;1mA \x1b[0m\x1b[0;32;1madded\x1b[0m (esc)
   \x1b[0;32;1mA \x1b[0m\x1b[0;32;1mcopied\x1b[0m (esc)