repo/init/sync: rework default git download output

When we download git sources, we get a progress bar (good) and we get
a dump of all the refs we downloaded (bad) as it can easily be 100+ if
not 1000+ depending on the project (for each git repo!).  Lets rework
the output behavior so that:
* quiet: Only errors.
* default: Progress bars (if on a tty).
* verbose: Full output (progress bars & downloaded refs).

Bug: https://crbug.com/gerrit/11293
Change-Id: I87a380075e79de6805f91095876dd1b37d32873a
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/256456
Tested-by: Mike Frysinger <vapier@google.com>
Reviewed-by: Michael Mortensen <mmortensen@google.com>

project.py

@@ -2440,8 +2440,10 @@ class Project(object):
       if os.path.exists(os.path.join(self.gitdir, 'shallow')):
         cmd.append('--depth=2147483647')
 
-    if quiet:
+    if not verbose:
       cmd.append('--quiet')
+    if not quiet and sys.stdout.isatty():
+      cmd.append('--progress')
     if not self.worktree:
       cmd.append('--update-head-ok')
     cmd.append(name)
@@ -2498,7 +2500,7 @@ class Project(object):
     ok = False
     for _i in range(2):
       gitcmd = GitCommand(self, cmd, bare=True, ssh_proxy=ssh_proxy,
-                          merge_output=True, capture_stdout=not verbose)
+                          merge_output=True, capture_stdout=quiet)
       ret = gitcmd.Wait()
       if ret == 0:
         ok = True
@@ -2578,8 +2580,10 @@ class Project(object):
       return False
 
     cmd = ['fetch']
-    if quiet:
+    if not verbose:
       cmd.append('--quiet')
+    if not quiet and sys.stdout.isatty():
+      cmd.append('--progress')
     if not self.worktree:
       cmd.append('--update-head-ok')
     cmd.append(bundle_dst)
@@ -2639,9 +2643,8 @@ class Project(object):
         # 22: HTTP page not retrieved. The requested url was not found or
         # returned another error with the HTTP error code being 400 or above.
         # This return code only appears if -f, --fail is used.
-        if not quiet:
-          print("Server does not provide clone.bundle; ignoring.",
-                file=sys.stderr)
+        if verbose:
+          print('Server does not provide clone.bundle; ignoring.')
         return False
       elif curlret and not verbose and output:
         print('%s' % output, file=sys.stderr)

repo

@@ -758,15 +758,17 @@ def _InitHttp():
 
 def _Fetch(url, cwd, src, quiet, verbose):
   cmd = ['fetch']
-  if quiet:
+  if not verbose:
     cmd.append('--quiet')
-    err = subprocess.PIPE
-  else:
   err = None
+  if not quiet and sys.stdout.isatty():
+    cmd.append('--progress')
+  elif not verbose:
+    err = subprocess.PIPE
   cmd.append(src)
   cmd.append('+refs/heads/*:refs/remotes/origin/*')
   cmd.append('+refs/tags/*:refs/tags/*')
-  run_git(*cmd, stderr=err, cwd=cwd)
+  run_git(*cmd, stderr=err, capture_output=False, cwd=cwd)
 
 
 def _DownloadBundle(url, cwd, quiet, verbose):