Add 'quick-check' option to install-build-deps.sh

tools/diagnose-me.py

 #!/usr/bin/python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Diagnose some common system configuration problems on Linux, and
 suggest fixes."""
 
 import os
 import subprocess
@@ skipping 61 matching lines @@
     proc = subprocess.Popen(['which', 'ninja'], stdout=subprocess.PIPE)
     stdout = proc.communicate()[0]
     if not 'depot_tools' in stdout:
         return ("The ninja binary in your path isn't from depot_tools:\n"
                 + "    " + stdout +
                 "Remove custom ninjas from your path so that the one\n"
                 "in depot_tools is used.\n")
     return None
 
 
+@Check("build dependencies are satisfied")
+def CheckBuildDeps():
+    script_path = os.path.join(
+        os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'build',
+        'install-build-deps.sh')
+    proc = subprocess.Popen([script_path, '--quick-check'],
+                            stdout=subprocess.PIPE)
+    stdout = proc.communicate()[0]
+    if 'WARNING' in stdout:
+        return ("Your build dependencies are out-of-date.\n"
+                "Run '" + script_path + "' to update.")
+    return None
+
+
 def RunChecks():
     for name, check in all_checks:
         sys.stdout.write("* Checking %s: " % name)
         sys.stdout.flush()
         error = check()
         if not error:
             print "ok"
         else:
             print "FAIL"
             print error
 
 
 if __name__ == '__main__':
     RunChecks()