run_isolated.py: install CIPD packages

client/isolateserver.py

Index: client/isolateserver.py
diff --git a/client/isolateserver.py b/client/isolateserver.py
index 1a679fcfcf1d58f95d3bf03be2e38857be83534c..f96cf9bd2003c372fca40112b5486898c840ae57 100755
--- a/client/isolateserver.py
+++ b/client/isolateserver.py
@@ -1523,6 +1523,17 @@ class DiskCache(LocalCache):
     with self._lock:
       self._linked.append(self._lru[digest])
 
+  def item_path(self, digest):
+    """Returns a path on disk of the cached item.
+
+    Raises:
+      CacheMiss if the item is not present in cache.
+    """

[M-A Ruel, 2016/06/06 23:34:51]

if digest not in self._lru:
  raise CacheMiss(digest)


since lru.LRUDict implements __contains__ and it is largely faster than doing a
disk I/O.

[nodir, 2016/06/07 18:46:35]

Done

+    path = self._path(digest)
+    if not fs.isfile(path):
+      raise CacheMiss(digest)
+    return path
+
   def _load(self):
     """Loads state of the cache from json file."""
     self._lock.assert_locked()