buildtools/wafsamba/samba_git.py

   1 import os
   2 import subprocess
   3
   4 def find_git(env=None):
   5     """Find the git binary."""
   6     if env is not None and 'GIT' in env:
   7         return env['GIT']
   8
   9     # Get version from GIT
  10     if os.path.exists("/usr/bin/git"):
  11         # this is useful when doing make dist without configuring
  12         return "/usr/bin/git"
  13
  14     return None
  15
  16
  17 def has_submodules(path):
  18     """Check whether a source directory is git-versioned and has submodules.
  19
  20     :param path: Path to Samba source directory
  21     """
  22     return (os.path.isdir(os.path.join(path, ".git")) and
  23             os.path.isfile(os.path.join(path, ".gitmodules")))
  24
  25
  26 def read_submodule_status(path, env=None):
  27     """Check status of submodules.
  28
  29     :param path: Path to git directory
  30     :param env: Optional waf environment
  31     :return: Yields tuples with submodule relpath and status
  32         (one of: 'out-of-date', 'not-checked-out', 'up-to-date')
  33     :raise RuntimeError: raised when parsing of 'git submodule status' output
  34         fails.
  35     """
  36     if not has_submodules(path):
  37         # No point in running git.
  38         return
  39     git = find_git(env)
  40     if git is None:
  41         return
  42     p = subprocess.Popen([git, "submodule", "status"], stdout=subprocess.PIPE,
  43         cwd=path)
  44     (stdout, stderr) = p.communicate(None)
  45     for l in stdout.splitlines():
  46         l = l.rstrip()
  47         status = l[0]
  48         l = l[1:]
  49         parts = l.split(" ")
  50         if len(parts) > 2 and status in ("-", "+"):
  51             yield (parts[1], "out-of-date")
  52         elif len(parts) == 2 and status == "-":
  53             yield (parts[1], "not-checked-out")
  54         elif len(parts) > 2 and status == " ":
  55             yield (parts[1], "up-to-date")
  56         else:
  57             raise RuntimeError("Unable to parse submodule status: %r, %r" % (status, parts))