g: use python to pass args transparently

Change-Id: Ib02058a73d2959c5ea5073924b2c38195bbe08fc

src/g

@@ -1,7 +1,17 @@
-#!/bin/sh
-for gitdir in */.git ; do
-  dir="$(dirname "$gitdir")"
-  echo
-  echo "===== $dir ====="
-  git -C "$dir" $@
-done
+#!/usr/bin/env python3
+
+import sys
+import os
+import subprocess
+
+git_subdirs = []
+
+for subdir in os.listdir():
+  if not os.path.isdir(os.path.join(subdir, '.git')):
+    continue
+
+  print('\n===== %s =====' % subdir)
+  sys.stdout.flush()
+  subprocess.call(['git', '-C', subdir] + sys.argv[1:])
+  sys.stdout.flush()
+  sys.stderr.flush()