Add progress meter to 'repo start'

This is mostly useful if the number of projects to switch is many
(e.g. all of Android) and a large number of them are behind the
current manifest revision.  We wind up needing to run git just to
make the working tree match, and that often makes the command take
a couple of seconds longer than we'd like.

Signed-off-by: Shawn O. Pearce <sop@google.com>

2 files changed, 11 insertions, 3 deletions

diff --git a/project.py b/project.py
index 0a761ef4..10a9b257 100644
--- a/project.py
+++ b/project.py
@@ -782,7 +782,8 @@ class Project(object):
       cmd = ['checkout', name, '--']
       return GitCommand(self,
                         cmd,
-                        capture_stdout = True).Wait() == 0
+                        capture_stdout = True,
+                        capture_stderr = True).Wait() == 0
 
     branch = self.GetBranch(name)
     branch.remote = self.GetRemote(self.remote.name)
@@ -817,7 +818,8 @@ class Project(object):
     cmd = ['checkout', '-b', branch.name, rev]
     if GitCommand(self,
                   cmd,
-                  capture_stdout = True).Wait() == 0:
+                  capture_stdout = True,
+                  capture_stderr = True).Wait() == 0:
       branch.Save()
       return True
     return False
diff --git a/subcmds/start.py b/subcmds/start.py
index d30949f7..49bb0e1a 100644
--- a/subcmds/start.py
+++ b/subcmds/start.py
@@ -16,6 +16,7 @@
 import sys
 from command import Command
 from git_command import git
+from progress import Progress
 
 class Start(Command):
   common = True
@@ -38,9 +39,14 @@ revision specified in the manifest.
       sys.exit(1)
 
     err = []
-    for project in self.GetProjects(args[1:]):
+    all = self.GetProjects(args[1:])
+
+    pm = Progress('Starting %s' % nb, len(all))
+    for project in all:
+      pm.update()
       if not project.StartBranch(nb):
         err.append(project)
+    pm.end()
 
     if err:
       err.sort()