#!/usr/env/python
import os
import os.path
from subprocess import call
    
def update(apps_dir):
    """Updates a collection of Subversion/Git/Mercurial/Bazaar working copies, including subdirectories"""
    for app_name in os.listdir(apps_dir):
        app_dir = os.path.abspath(os.path.join(apps_dir, app_name))
        if os.path.isdir(app_dir):
            git_path = os.path.join(app_dir, '.git')
            svn_path = os.path.join(app_dir, '.svn')
            hg_path = os.path.join(app_dir, '.hg')
            bzr_path = os.path.join(app_dir, '.bzr')
            if os.path.lexists(svn_path):
                print "Updating svn %s" % app_dir
                os.chdir(app_dir)
                call(['svn', 'update'])
            elif os.path.lexists(git_path):
                print "Updating git %s" % app_dir
                os.chdir(app_dir)
                call(['git', 'pull'])
            elif os.path.lexists(hg_path):
                print "Updating hg %s" % app_dir
                os.chdir(app_dir)
                call(['hg', 'pull', '-u'])
            elif os.path.lexists(bzr_path):
                print "Updating bzr %s" % app_dir
                os.chdir(app_dir)
                call(['bzr', 'update'])     
            else:
                update(app_dir)
        else:
            continue
    return None
    
if __name__ == "__main__":
    update(os.path.abspath('.'))