Merge branch 'as/dir-c-cleanup'
[git] / 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, 'testgit.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