fetch-svn-externals

#!/usr/bin/env python
#
# Read a depot_tools style DEPS file and recursively checkout the svn externals
# listed
#

import os

# required to make some DEPS files syntactically valid
def Var(var_name):
    return '%s'

def system(cmd):
    print cmd
    os.system(cmd)

def checkout_deps(basepath):
    depsfile = os.path.join(basepath, 'DEPS')

    if not os.path.exists(depsfile):
        print 'Nothing to do for', depsfile
        return
    print 'Processing deps in', depsfile

    # evaluate contents of DEPS file
    f = open(depsfile, 'r')
    exec(f)

    # process the path:svnurl pairs in deps
    for path in deps.keys():
        src = deps[path]
        (url, rev) = src.split('@')
        if path.startswith('src/'):
            path = path[4:]
        print '%s %s %s' % (url, path, rev)

        if not os.path.exists(os.path.join(path, '.git')):
            system('git svn clone -q %s %s -r %s' % (url, path, rev))
        else:
            system('cd %s; git svn fetch -q -r %s' % (path, rev))
            system('cd %s; git reset --hard $(git svn find-rev r%s)' % (path, rev))
        # and recurse
        checkout_deps(os.path.join(basepath, path))

    print 'Done processing of', depsfile

checkout_deps('.')