git_remote_helpers/git/importer.py

   1 import os
   2 import subprocess
   3
   4 from git_remote_helpers.util import check_call, check_output
   5
   6
   7 class GitImporter(object):
   8     """An importer for testgit repositories.
   9
  10     This importer simply delegates to git fast-import.
  11     """
  12
  13     def __init__(self, repo):
  14         """Creates a new importer for the specified repo.
  15         """
  16
  17         self.repo = repo
  18
  19     def get_refs(self, gitdir):
  20         """Returns a dictionary with refs.
  21         """
  22         args = ["git", "--git-dir=" + gitdir, "for-each-ref", "refs/heads"]
  23         lines = check_output(args).strip().split('\n')
  24         refs = {}
  25         for line in lines:
  26             value, name = line.split(' ')
  27             name = name.strip('commit\t')
  28             refs[name] = value
  29         return refs
  30
  31     def do_import(self, base):
  32         """Imports a fast-import stream to the given directory.
  33
  34         Simply delegates to git fast-import.
  35         """
  36
  37         dirname = self.repo.get_base_path(base)
  38         if self.repo.local:
  39             gitdir = self.repo.gitpath
  40         else:
  41             gitdir = os.path.abspath(os.path.join(dirname, '.git'))
  42         path = os.path.abspath(os.path.join(dirname, 'git.marks'))
  43
  44         if not os.path.exists(dirname):
  45             os.makedirs(dirname)
  46
  47         refs_before = self.get_refs(gitdir)
  48
  49         args = ["git", "--git-dir=" + gitdir, "fast-import", "--quiet", "--export-marks=" + path]
  50
  51         if os.path.exists(path):
  52             args.append("--import-marks=" + path)
  53
  54         check_call(args)
  55
  56         refs_after = self.get_refs(gitdir)
  57
  58         changed = {}
  59
  60         for name, value in refs_after.iteritems():
  61             if refs_before.get(name) == value:
  62                 continue
  63
  64             changed[name] = value
  65
  66         return changed