gclient: implement a less hacky relative URL implementation

gclient_utils.py

Index: gclient_utils.py
diff --git a/gclient_utils.py b/gclient_utils.py
index e2cfb11b3fe91b4ecc5af06ca17ff6cb397085b6..3a6438d1c0226dd1bf8d1d288e574dbdef0ed399 100644
--- a/gclient_utils.py
+++ b/gclient_utils.py
@@ -38,6 +38,17 @@ def SplitUrlRevision(url):
   return tuple(components)
 
 
+def FullUrlFromRelative(base_url, url):
+  # Find the forth '/' and strip from there. A bit hackish.
+  return '/'.join(base_url.split('/')[:4]) + url
+
+
+def FullUrlFromRelative2(base_url, url):

[M-A Ruel, 2009/12/15 18:49:42]

Frankly, I would have prefered it to be SCM-dependent. The main issue is that
git cannot have sub-directory checkout so using this is *always* appropriate
while the reverse is not true for FullUrlFromRelative(). Hence I think this
should be moved back to gclient_scm.py

[Mandeep Singh Baines, 2009/12/15 20:54:30]

k, I'll send out a CL to do that. I don't want to revert this change as it will
break the ChromiumOS build.

+  # Strip from last '/'
+  # Equivalent to unix basename
+  return base_url[:base_url.rfind('/')] + url
+
+
 def ParseXML(output):
   try:
     return xml.dom.minidom.parseString(output)