Create "git cache" command.

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 2a15abe5f810357d94dc68b58f5df181ff9576eb..dc2fc87c3966b99e783c7623ece4e631b1ecadaf 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -12,7 +12,6 @@ import re
 import sys
 import tempfile
 import threading
-import time
 import urlparse
 
 import download_from_google_storage
@@ -142,43 +141,6 @@ class SCMWrapper(object):
     return getattr(self, command)(options, args, file_list)
 
 
-class GitFilter(object):
-  """A filter_fn implementation for quieting down git output messages.
-
-  Allows a custom function to skip certain lines (predicate), and will throttle
-  the output of percentage completed lines to only output every X seconds.
-  """
-  PERCENT_RE = re.compile('.* ([0-9]{1,2})% .*')
-
-  def __init__(self, time_throttle=0, predicate=None):
-    """
-    Args:
-      time_throttle (int): GitFilter will throttle 'noisy' output (such as the
-        XX% complete messages) to only be printed at least |time_throttle|
-        seconds apart.
-      predicate (f(line)): An optional function which is invoked for every line.
-        The line will be skipped if predicate(line) returns False.
-    """
-    self.last_time = 0
-    self.time_throttle = time_throttle
-    self.predicate = predicate
-
-  def __call__(self, line):
-    # git uses an escape sequence to clear the line; elide it.
-    esc = line.find(unichr(033))
-    if esc > -1:
-      line = line[:esc]
-    if self.predicate and not self.predicate(line):
-      return
-    now = time.time()
-    match = self.PERCENT_RE.match(line)
-    if not match:
-      self.last_time = 0
-    if (now - self.last_time) >= self.time_throttle:
-      self.last_time = now
-      print line
-
-
 class GitWrapper(SCMWrapper):
   """Wrapper for Git"""
   name = 'git'
@@ -1032,7 +994,7 @@ class GitWrapper(SCMWrapper):
     kwargs.setdefault('cwd', self.checkout_path)
     git_filter = not options.verbose
     if git_filter:
-      kwargs['filter_fn'] = GitFilter(kwargs.get('filter_fn'))
+      kwargs['filter_fn'] = gclient_utils.GitFilter(kwargs.get('filter_fn'))
       kwargs.setdefault('print_stdout', False)
       # Don't prompt for passwords; just fail quickly and noisily.
       # By default, git will use an interactive terminal prompt when a username/