Add code to turn the style stuff into a mercurial hook.

Nag the user during compile if they have an hg cloned copy of M5, have
mercurial installed, but don't have the style hook enabled.

--HG--
extra : convert_revision : 6bcbb67f1a3fcd36db7d3ef16a9ff19680f126f2

SConstruct

@@ -67,7 +67,7 @@ import sys
 import os
 import subprocess
 
-from os.path import join as joinpath
+from os.path import isdir, join as joinpath
 
 # Check for recent-enough Python and SCons versions. If your system's
 # default installation of Python is not recent enough, you can use a
@@ -97,6 +97,34 @@ SRCDIR = joinpath(ROOT, 'src')
 # tell python where to find m5 python code
 sys.path.append(joinpath(ROOT, 'src/python'))
 
+def check_style_hook(ui):
+ ui.readconfig(joinpath(ROOT, '.hg', 'hgrc'))
+ style_hook = ui.config('hooks', 'pretxncommit.style', None)
+
+ if not style_hook:
+ print """\
+You're missing the M5 style hook.
+Please install the hook so we can ensure that all code fits a common style.
+
+All you'd need to do is add the following lines to your repository .hg/hgrc
+or your personal .hgrc
+----------------
+
+[extensions]
+style = %s/util/style.py
+
+[hooks]
+pretxncommit.style = python:style.check_whitespace
+""" % (ROOT)
+ sys.exit(1)
+
+if isdir(joinpath(ROOT, '.hg')):
+ try:
+ from mercurial import ui
+ check_style_hook(ui.ui())
+ except ImportError:
+ pass
+
 ###################################################
 #
 # Figure out which configurations to set up based on the path(s) of