Cross-repo recipe package system.

scripts/slave/bot_update.py

Index: scripts/slave/bot_update.py
diff --git a/scripts/slave/bot_update.py b/scripts/slave/bot_update.py
index c5db40b27ed683b43905da57cf7fc08e9cb018bf..1a2e5974c9b4f7ffd237ee1fb8032cf15b71151d 100755
--- a/scripts/slave/bot_update.py
+++ b/scripts/slave/bot_update.py
@@ -42,9 +42,25 @@ THIS_DIR = path.dirname(path.abspath(__file__))
 SCRIPTS_DIR = path.dirname(THIS_DIR)
 BUILD_DIR = path.dirname(SCRIPTS_DIR)
 ROOT_DIR = path.dirname(BUILD_DIR)
-BUILD_INTERNAL_DIR = path.join(ROOT_DIR, 'build_internal')
 DEPOT_TOOLS_DIR = path.join(ROOT_DIR, 'depot_tools')
 
+# TODO(luqui): This is a horrible hack to identify build_internal when build
+# is a recipe dependency.  bot_update should not be depending on internal,
+# rather the arrow should go the other way (or just be destroyed).
+def check_build_internal(d):
+  d = path.abspath(d)
+  if path.basename(d) == 'build_internal' and path.isdir(d):
+    return d
+  else:
+    return None
+
+BUILD_INTERNAL_DIR = (
+    check_build_internal(path.join(ROOT_DIR, 'build_internal')) or
+    check_build_internal(path.join(ROOT_DIR,      # .recipe_deps
+                                   path.pardir,   # slave
+                                   path.pardir,   # scripts
+                                   path.pardir))) # build_internal
+
 
 CHROMIUM_GIT_HOST = 'https://chromium.googlesource.com'
 CHROMIUM_SRC_URL = CHROMIUM_GIT_HOST + '/chromium/src.git'
@@ -187,7 +203,7 @@ cache_dir = r%(cache_dir)s
 
 
 internal_data = {}
-if os.path.isdir(BUILD_INTERNAL_DIR):
+if BUILD_INTERNAL_DIR:
   local_vars = {}
   try:
     execfile(os.path.join(
@@ -316,7 +332,12 @@ if sys.platform.startswith('win'):
 
 # Find the patch tool.
 if sys.platform.startswith('win'):
-  PATCH_TOOL = path.join(BUILD_INTERNAL_DIR, 'tools', 'patch.EXE')
+  if not BUILD_INTERNAL_DIR:
+    print 'Warning: could not find patch tool because there is no '
+    print 'build_internal present.'
+    PATCH_TOOL = None
+  else:
+    PATCH_TOOL = path.join(BUILD_INTERNAL_DIR, 'tools', 'patch.EXE')
 else:
   PATCH_TOOL = '/usr/bin/patch'