git_remote_helpers/git/exporter.py

   1 import os
   2 import subprocess
   3 import sys
   4
   5 from git_remote_helpers.util import check_call
   6
   7
   8 class GitExporter(object):
   9     """An exporter for testgit repositories.
  10
  11     The exporter simply delegates to git fast-export.
  12     """
  13
  14     def __init__(self, repo):
  15         """Creates a new exporter for the specified repo.
  16         """
  17
  18         self.repo = repo
  19
  20     def export_repo(self, base, refs=None):
  21         """Exports a fast-export stream for the given directory.
  22
  23         Simply delegates to git fast-epxort and pipes it through sed
  24         to make the refs show up under the prefix rather than the
  25         default refs/heads. This is to demonstrate how the export
  26         data can be stored under it's own ref (using the refspec
  27         capability).
  28
  29         If None, refs defaults to ["HEAD"].
  30         """
  31
  32         if not refs:
  33             refs = ["HEAD"]
  34
  35         dirname = self.repo.get_base_path(base)
  36         path = os.path.abspath(os.path.join(dirname, 'testgit.marks'))
  37
  38         if not os.path.exists(dirname):
  39             os.makedirs(dirname)
  40
  41         print "feature relative-marks"
  42         if os.path.exists(os.path.join(dirname, 'git.marks')):
  43             print "feature import-marks=%s/git.marks" % self.repo.hash
  44         print "feature export-marks=%s/git.marks" % self.repo.hash
  45         sys.stdout.flush()
  46
  47         args = ["git", "--git-dir=" + self.repo.gitpath, "fast-export", "--export-marks=" + path]
  48
  49         if os.path.exists(path):
  50             args.append("--import-marks=" + path)
  51
  52         args.extend(refs)
  53
  54         p1 = subprocess.Popen(args, stdout=subprocess.PIPE)
  55
  56         args = ["sed", "s_refs/heads/_" + self.repo.prefix + "_g"]
  57
  58         check_call(args, stdin=p1.stdout)