deps_update.py

   1
   2 import os
   3 import subprocess
   4
   5 import lxml.etree
   6
   7
   8 deps_file = "deps.xml"
   9
  10
  11 def get1(lst):
  12     assert len(lst) == 1, lst
  13     return lst[0]
  14
  15
  16 def write_file_atomically(filename, data):
  17     tmp_filename = "%s.tmp" % filename
  18     fh = open(tmp_filename, "w")
  19     fh.write(data)
  20     fh.close()
  21     os.rename(tmp_filename, filename)
  22
  23
  24 def main():
  25     xml = lxml.etree.parse(open(deps_file))
  26     for mod in xml.xpath(".//module"):
  27         path = get1(mod.xpath(".//path"))
  28         proc = subprocess.Popen(
  29             ["git", "rev-parse", "HEAD"], cwd=path.attrib["dir"],
  30             stdout=subprocess.PIPE)
  31         stdout = proc.communicate()[0]
  32         assert proc.wait() == 0
  33         commit = stdout.rstrip()
  34         rev = get1(mod.xpath(".//rev"))
  35         rev.attrib["commit"] = commit
  36         print commit, mod.attrib["name"]
  37     write_file_atomically(deps_file, lxml.etree.tostring(xml) + "\n")
  38
  39
  40 if __name__ == "__main__":
  41     main()