3 # This command is a simple remote-helper, that is used both as a
4 # testcase for the remote-helper functionality, and as an example to
5 # show remote-helper authors one possible implementation.
7 # This is a Git <-> Git importer/exporter, that simply uses git
8 # fast-import and git fast-export to consume and produce fast-import
11 # To understand better the way things work, one can activate debug
12 # traces by setting (to any value) the environment variables
13 # GIT_TRANSPORT_HELPER_DEBUG and GIT_DEBUG_TESTGIT, to see messages
14 # from the transport-helper side, or from this example remote-helper.
16 # hashlib is only available in python >= 2.5
19 _digest = hashlib.sha1
26 sys.path.insert(0, os.getenv("GITPYTHONLIB","."))
28 from git_remote_helpers.util import die, debug, warn
29 from git_remote_helpers.git.repo import GitRepo
30 from git_remote_helpers.git.exporter import GitExporter
31 from git_remote_helpers.git.importer import GitImporter
32 from git_remote_helpers.git.non_local import NonLocalGit
34 if sys.hexversion < 0x01050200:
35 # os.makedirs() is the limiter
36 sys.stderr.write("git-remote-testgit: requires Python 1.5.2 or later.\n")
39 def get_repo(alias, url):
40 """Returns a git repository object initialized for usage.
48 hasher.update(repo.path)
49 repo.hash = hasher.hexdigest()
51 repo.get_base_path = lambda base: os.path.join(
52 base, 'info', 'fast-import', repo.hash)
54 prefix = 'refs/testgit/%s/' % alias
55 debug("prefix: '%s'", prefix)
57 repo.gitdir = os.environ["GIT_DIR"]
61 repo.exporter = GitExporter(repo)
62 repo.importer = GitImporter(repo)
63 repo.non_local = NonLocalGit(repo)
68 def local_repo(repo, path):
69 """Returns a git repository object initalized for usage.
74 local.non_local = None
75 local.gitdir = repo.gitdir
76 local.alias = repo.alias
77 local.prefix = repo.prefix
78 local.hash = repo.hash
79 local.get_base_path = repo.get_base_path
80 local.exporter = GitExporter(local)
81 local.importer = GitImporter(local)
86 def do_capabilities(repo, args):
87 """Prints the supported capabilities.
92 print "refspec refs/heads/*:%s*" % repo.prefix
94 dirname = repo.get_base_path(repo.gitdir)
96 if not os.path.exists(dirname):
99 path = os.path.join(dirname, 'git.marks')
101 print "*export-marks %s" % path
102 if os.path.exists(path):
103 print "*import-marks %s" % path
105 print # end capabilities
108 def do_list(repo, args):
109 """Lists all known references.
111 Bug: This will always set the remote head to master for non-local
112 repositories, since we have no way of determining what the remote
113 head is at clone time.
116 for ref in repo.revs:
117 debug("? refs/heads/%s", ref)
118 print "? refs/heads/%s" % ref
121 debug("@refs/heads/%s HEAD" % repo.head)
122 print "@refs/heads/%s HEAD" % repo.head
124 debug("@refs/heads/master HEAD")
125 print "@refs/heads/master HEAD"
130 def update_local_repo(repo):
131 """Updates (or clones) a local repo.
137 path = repo.non_local.clone(repo.gitdir)
138 repo.non_local.update(repo.gitdir)
139 repo = local_repo(repo, path)
143 def do_import(repo, args):
144 """Exports a fast-import stream from testgit for git to import.
148 die("Import needs exactly one ref")
151 die("Need gitdir to import")
157 line = sys.stdin.readline()
160 if not line.startswith('import '):
161 die("Expected import line.")
163 # strip of leading 'import '
164 ref = line[7:].strip()
167 repo = update_local_repo(repo)
168 repo.exporter.export_repo(repo.gitdir, refs)
173 def do_export(repo, args):
174 """Imports a fast-import stream from git to testgit.
178 die("Need gitdir to export")
180 update_local_repo(repo)
181 changed = repo.importer.do_import(repo.gitdir)
184 repo.non_local.push(repo.gitdir)
192 'capabilities': do_capabilities,
200 """Cleans up the url.
203 if value.startswith('testgit::'):
209 def read_one_line(repo):
210 """Reads and processes one command.
213 sleepy = os.environ.get("GIT_REMOTE_TESTGIT_SLEEPY")
215 debug("Sleeping %d sec before readline" % int(sleepy))
216 time.sleep(int(sleepy))
218 line = sys.stdin.readline()
223 warn("Unexpected EOF")
226 cmdline = cmdline.strip().split()
228 # Blank line means we're about to quit
232 debug("Got command '%s' with args '%s'", cmd, ' '.join(cmdline))
234 if cmd not in COMMANDS:
235 die("Unknown command, %s", cmd)
245 """Starts a new remote helper for the specified repository.
249 die("Expecting exactly three arguments.")
252 if os.getenv("GIT_DEBUG_TESTGIT"):
253 import git_remote_helpers.util
254 git_remote_helpers.util.DEBUG = True
256 alias = sanitize(args[1])
257 url = sanitize(args[2])
259 if not alias.isalnum():
260 warn("non-alnum alias '%s'", alias)
266 repo = get_repo(alias, url)
268 debug("Got arguments %s", args[1:])
272 sys.stdin = os.fdopen(sys.stdin.fileno(), 'r', 0)
274 more = read_one_line(repo)
276 if __name__ == '__main__':
277 sys.exit(main(sys.argv))