Few fixes for mkowners.py.

-) Paths should all be absolute to /
-) Computing the intersection of two globs should happen with the
full path in there, not just the directory's glob.

.github/CODEOWNERS

 # Auto-generated by the tools/mkowners/mkowners.py tool
 # Uses OWNERS files in different modules throughout the
 # repository as the source of truth for module ownership.
-** @a11r @nicolasnoble @ctiller
-bazel/** @nicolasnoble @dgquintas @ctiller
-cmake/** @jtattermusch @a11r @nicolasnoble @ctiller
-doc/PROTOCOL-HTTP2.md @ejona86 @a11r @nicolasnoble @ctiller
-doc/interop-test-descriptions.md @ejona86 @a11r @nicolasnoble @ctiller
-etc/** @jboeuf @nicolasnoble @a11r @ctiller
-include/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
-src/core/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
-src/cpp/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
-src/csharp/** @jtattermusch @apolcyn @a11r @nicolasnoble @ctiller
-src/node/** @murgatroid99 @a11r @nicolasnoble @ctiller
-src/objective-c/** @muxi @makdharma @a11r @nicolasnoble @ctiller
-src/php/** @stanley-cheung @murgatroid99 @a11r @nicolasnoble @ctiller
-src/python/** @nathanielmanistaatgoogle @kpayson64 @a11r @nicolasnoble @ctiller
-src/ruby/** @apolcyn @murgatroid99 @a11r @nicolasnoble @ctiller
-test/build/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
-test/core/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
-test/cpp/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
-tools/** @matt-kwong @jtattermusch @nicolasnoble @a11r @ctiller
-tools/codegen/core/** @ctiller @dgquintas @markdroth
-tools/dockerfile/** @matt-kwong @jtattermusch @nicolasnoble @a11r @ctiller
-tools/run_tests/** @matt-kwong @jtattermusch @nicolasnoble @a11r @ctiller
+/** @a11r @nicolasnoble @ctiller
+/bazel/** @nicolasnoble @dgquintas @ctiller
+/cmake/** @jtattermusch @a11r @nicolasnoble @ctiller
+/doc/PROTOCOL-HTTP2.md @ejona86 @a11r @nicolasnoble @ctiller
+/doc/interop-test-descriptions.md @ejona86 @a11r @nicolasnoble @ctiller
+/etc/** @jboeuf @nicolasnoble @a11r @ctiller
+/include/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
+/src/core/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
+/src/cpp/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
+/src/csharp/** @jtattermusch @apolcyn @a11r @nicolasnoble @ctiller
+/src/node/** @murgatroid99 @a11r @nicolasnoble @ctiller
+/src/objective-c/** @muxi @makdharma @a11r @nicolasnoble @ctiller
+/src/php/** @stanley-cheung @murgatroid99 @a11r @nicolasnoble @ctiller
+/src/python/** @nathanielmanistaatgoogle @kpayson64 @a11r @nicolasnoble @ctiller
+/src/ruby/** @apolcyn @murgatroid99 @a11r @nicolasnoble @ctiller
+/test/build/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
+/test/core/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
+/test/cpp/** @ctiller @markdroth @dgquintas @a11r @nicolasnoble
+/tools/** @matt-kwong @jtattermusch @nicolasnoble @a11r @ctiller
+/tools/codegen/core/** @ctiller @dgquintas @markdroth
+/tools/dockerfile/** @matt-kwong @jtattermusch @nicolasnoble @a11r @ctiller
+/tools/run_tests/** @matt-kwong @jtattermusch @nicolasnoble @a11r @ctiller

tools/mkowners/mkowners.py

@@ -123,6 +123,9 @@ owners_data = new_owners_data
 # a CODEOWNERS file for GitHub
 #
 
+def full_dir(rules_dir, sub_path):
+  return os.path.join(rules_dir, sub_path) if rules_dir != '.' else sub_path
+
 def glob_intersect(g1, g2):
   if not g2:
     return all(c == '*' for c in g1)
@@ -136,17 +139,18 @@ def glob_intersect(g1, g2):
     return glob_intersect(t1, g2) or glob_intersect(g1, t2)
   return c1 == c2 and glob_intersect(t1, t2)
 
-def add_parent_to_globs(parent, globs):
+def add_parent_to_globs(parent, globs, globs_dir):
   if not parent: return
   for owners in owners_data:
     if owners.dir == parent:
       for directive in owners.directives:
         for dglob in directive.globs or ['**']:
           for gglob, glob in globs.items():
-            if glob_intersect(dglob, gglob):
+            if glob_intersect(full_dir(globs_dir, gglob),
+                              full_dir(owners.dir, dglob)):
               if directive.who not in glob:
                 glob.append(directive.who)
-      add_parent_to_globs(owners.parent, globs)
+      add_parent_to_globs(owners.parent, globs, globs_dir)
       return
   assert(False)
 
@@ -167,9 +171,8 @@ with open(args.out, 'w') as out:
         if glob not in globs:
           globs[glob] = []
         globs[glob].append(directive.who)
-    add_parent_to_globs(head.parent, globs)
+    add_parent_to_globs(head.parent, globs, head.dir)
     for glob, owners in globs.items():
-      out.write('%s %s\n' % (
-          os.path.join(head.dir, glob) if head.dir != '.' else glob,
-          ' '.join(owners)))
+      out.write('/%s %s\n' % (
+          full_dir(head.dir, glob), ' '.join(owners)))
     done.add(head.dir)