Merge pull request #33 from brave/override_cc

override cc files during compilation

script/redirect-cc.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+import sys
+import subprocess
+import os.path
+
+def main():
+    args = sys.argv[1:]
+    replace_cc_arg(args)
+    cc_retcode = subprocess.call(args)
+    return cc_retcode
+
+def replace_cc_arg(args):
+    # Interested in -c <path>.cc
+    index_c = args.index('-c')
+
+    if 0 == len(args) or index_c == len(args) - 1:
+        # Something wrong, we have -c but have no path in the next arg
+        # Just then give all to cc as is
+        return
+    index_path = index_c + 1
+
+    path_cc = args[index_path]
+
+    # Get the absolute *.cc path
+    abs_path_cc = os.path.abspath(path_cc)
+
+    # Get this `brave/src/brave/script/redirect-cc.py` script absolute location
+    this_py_path = os.path.realpath(__file__)
+
+    # Get the original chromium dir location, triple parent of current redirect-cc.py
+    chromium_original_dir = os.path.abspath(os.path.join(this_py_path, os.pardir, os.pardir, os.pardir))
+
+    if len(chromium_original_dir) >= len(abs_path_cc) + 1:
+        # Could not get original chromium src dir
+        return
+
+    # Relative path
+    rel_path = abs_path_cc[len(chromium_original_dir) + 1:];
+
+    # Filter away out and out_x86
+    # Maybe this dir can be queried from env variable instead of hardcoding
+    OUT_DIR_NAMES = ['out', 'out_x86']
+    start_dir = rel_path.split(os.sep)[0]
+    if start_dir in OUT_DIR_NAMES:
+        # Don't even try to substitute path for auto-generated cc
+        return
+
+    # Build possible brave/chromium_src_path
+    brave_path = os.path.join(chromium_original_dir, 'brave', 'chromium_src', rel_path)
+    if os.path.isfile(brave_path):
+        # Okay, we can replace
+        args[index_path] = brave_path
+
+    return
+
+if __name__ == '__main__':
+  sys.exit(main())