Error on multiple files with same basenames in target.

pylib/gyp/input.py

Index: pylib/gyp/input.py
===================================================================
--- pylib/gyp/input.py	(revision 1311)
+++ pylib/gyp/input.py	(working copy)
@@ -2105,6 +2105,33 @@
                     (target, target_type, '/'.join(VALID_TARGET_TYPES)))
 
 
+def ValidateSourcesInTarget(target, target_dict, build_file):
+  # TODO: Check if MSVC allows this for non-static_library targets.
+  if target_dict.get('type', None) != 'static_library':
+    return
+  sources = target_dict.get('sources', [])
+  basenames = {}
+  for source in sources:
+    name, ext = os.path.splitext(source)
+    is_compiled_file = ext in [
+        '.c', '.cc', '.cpp', '.cxx', '.m', '.mm', '.s', '.S']
+    if not is_compiled_file:
+      continue
+    basename = os.path.basename(name)  # Don't include extension.
+    basenames.setdefault(basename, []).append(source)
+
+  error = ''
+  for basename, files in basenames.iteritems():
+    if len(files) > 1:
+      error += '  %s: %s\n' % (basename, ' '.join(files))
+
+  if error:
+    print ('static library %s has several files with the same basename:\n' %
+           target + error + 'Some build systems, e.g. MSVC08, '
+           'cannot handle that.')
+    raise KeyError, 'Duplicate basenames in sources section, see list above'
+
+
 def ValidateRulesInTarget(target, target_dict, extra_sources_for_rules):
   """Ensures that the rules sections in target_dict are valid and consistent,
   and determines which sources they apply to.
@@ -2162,22 +2189,6 @@
       rule['rule_sources'] = rule_sources
 
 
-def ValidateActionsInTarget(target, target_dict, build_file):
-  '''Validates the inputs to the actions in a target.'''
-  target_name = target_dict.get('target_name')
-  actions = target_dict.get('actions', [])
-  for action in actions:
-    action_name = action.get('action_name')
-    if not action_name:
-      raise Exception("Anonymous action in target %s.  "
-                      "An action must have an 'action_name' field." %
-                      target_name)
-    inputs = action.get('inputs', [])
-    action_command = action.get('action')
-    if action_command and not action_command[0]:
-      raise Exception("Empty action as command in target %s." % target_name)
-
-
 def ValidateRunAsInTarget(target, target_dict, build_file):
   target_name = target_dict.get('target_name')
   run_as = target_dict.get('run_as')
@@ -2208,6 +2219,22 @@
                     (target_name, build_file))
 
 
+def ValidateActionsInTarget(target, target_dict, build_file):
+  '''Validates the inputs to the actions in a target.'''
+  target_name = target_dict.get('target_name')
+  actions = target_dict.get('actions', [])
+  for action in actions:
+    action_name = action.get('action_name')
+    if not action_name:
+      raise Exception("Anonymous action in target %s.  "
+                      "An action must have an 'action_name' field." %
+                      target_name)
+    inputs = action.get('inputs', [])
+    action_command = action.get('action')
+    if action_command and not action_command[0]:
+      raise Exception("Empty action as command in target %s." % target_name)
+
+
 def TurnIntIntoStrInDict(the_dict):
   """Given dict the_dict, recursively converts all integers into strings.
   """
@@ -2393,6 +2420,7 @@
     target_dict = targets[target]
     build_file = gyp.common.BuildFile(target)
     ValidateTargetType(target, target_dict)
+    ValidateSourcesInTarget(target, target_dict, build_file)
     ValidateRulesInTarget(target, target_dict, extra_sources_for_rules)
     ValidateRunAsInTarget(target, target_dict, build_file)
     ValidateActionsInTarget(target, target_dict, build_file)