Fix an issue that tools/license.py fails when BUILD.gn is not directly

tools/licenses.py

Index: tools/licenses.py
diff --git a/tools/licenses.py b/tools/licenses.py
index 17dc94a3aab165e29e891a19b42189909aec5750..bdcbca9c7d31d197790843751585ecaf8798539f 100755
--- a/tools/licenses.py
+++ b/tools/licenses.py
@@ -18,6 +18,7 @@ Commands:
 import argparse
 import cgi
 import os
+import re
 import subprocess
 import sys
 
@@ -487,9 +488,12 @@ def FindThirdPartyDeps(gn_out_dir, gn_target):
                                        "deps", "--as=buildfile", "--all"])
     third_party_deps = set()
     for build_dep in gn_deps.split():
-        if ("third_party" in build_dep and
-                os.path.basename(build_dep) == "BUILD.gn"):
-            third_party_deps.add(os.path.dirname(build_dep))
+        # Note that it must always return the direct sub-directory of
+        # third_party. e.g.:
+        # .../third_party/cld_3/src/src/BUILD.gn -> .../third_party/cld_3
+        m = re.search(r"^(.+/third_party/[^/]+)/(.+/)?BUILD\.gn$", build_dep)

[Paweł Hajdan Jr., 2017/04/06 11:55:09]

nit: Use single quotes ' .

[Hiroshi Ichikawa, 2017/04/07 05:07:51]

Done.

+        if m:
+            third_party_deps.add(m.group(1))
     return third_party_deps