Add fallback to DEPS from a missing deps file.

gclient.py

Index: gclient.py
diff --git a/gclient.py b/gclient.py
index 8d67b5a9eb1a3c4cc5d88ce297e9b32bd7390065..c45d73157e6184e398346331b1ba878def75b175 100755
--- a/gclient.py
+++ b/gclient.py
@@ -535,12 +535,22 @@ class Dependency(gclient_utils.WorkItem, DependencySettings):
 
     deps_content = None
     use_strict = False
-    filepath = os.path.join(self.root.root_dir, self.name, self.deps_file)
-    if not os.path.isfile(filepath):
+
+    # First try to locate the configured deps file.  If it's missing, fallback
+    # to DEPS.
+    deps_files = set([self.deps_file, 'DEPS'])

[iannucci, 2014/07/01 22:13:58]

yeah but order is still important and set() ordering is the same as dict
ordering (read: not defined).

+    for deps_file in deps_files:
+      filepath = os.path.join(self.root.root_dir, self.name, deps_file)
+      if os.path.isfile(filepath):
+        logging.info(
+            'ParseDepsFile(%s): %s file found at %s' % (
+              self.name, deps_file, filepath))
+        break
       logging.info(
           'ParseDepsFile(%s): No %s file found at %s' % (
-            self.name, self.deps_file, filepath))
-    else:
+            self.name, deps_file, filepath))
+
+    if os.path.isfile(filepath):
       deps_content = gclient_utils.FileRead(filepath)
       logging.debug('ParseDepsFile(%s) read:\n%s' % (self.name, deps_content))
       use_strict = 'use strict' in deps_content.splitlines()[0]