--- /dev/null
+#!/usr/bin/env python
+
+# This command is a simple remote-helper, that is used both as a
+# testcase for the remote-helper functionality, and as an example to
+# show remote-helper authors one possible implementation.
+#
+# This is a Git <-> Git importer/exporter, that simply uses git
+# fast-import and git fast-export to consume and produce fast-import
+# streams.
+#
+# To understand better the way things work, one can activate debug
+# traces by setting (to any value) the environment variables
+# GIT_TRANSPORT_HELPER_DEBUG and GIT_DEBUG_TESTGIT, to see messages
+# from the transport-helper side, or from this example remote-helper.
+
+# hashlib is only available in python >= 2.5
+try:
+ import hashlib
+ _digest = hashlib.sha1
+except ImportError:
+ import sha
+ _digest = sha.new
+import sys
+import os
+import time
+sys.path.insert(0, os.getenv("GITPYTHONLIB","."))
+
+from git_remote_helpers.util import die, debug, warn
+from git_remote_helpers.git.repo import GitRepo
+from git_remote_helpers.git.exporter import GitExporter
+from git_remote_helpers.git.importer import GitImporter
+from git_remote_helpers.git.non_local import NonLocalGit
+
++if sys.hexversion < 0x01050200:
++ # os.makedirs() is the limiter
++ sys.stderr.write("git-remote-testgit: requires Python 1.5.2 or later.\n")
++ sys.exit(1)
++
+def get_repo(alias, url):
+ """Returns a git repository object initialized for usage.
+ """
+
+ repo = GitRepo(url)
+ repo.get_revs()
+ repo.get_head()
+
+ hasher = _digest()
+ hasher.update(repo.path)
+ repo.hash = hasher.hexdigest()
+
+ repo.get_base_path = lambda base: os.path.join(
+ base, 'info', 'fast-import', repo.hash)
+
+ prefix = 'refs/testgit/%s/' % alias
+ debug("prefix: '%s'", prefix)
+
+ repo.gitdir = os.environ["GIT_DIR"]
+ repo.alias = alias
+ repo.prefix = prefix
+
+ repo.exporter = GitExporter(repo)
+ repo.importer = GitImporter(repo)
+ repo.non_local = NonLocalGit(repo)
+
+ return repo
+
+
+def local_repo(repo, path):
+ """Returns a git repository object initalized for usage.
+ """
+
+ local = GitRepo(path)
+
+ local.non_local = None
+ local.gitdir = repo.gitdir
+ local.alias = repo.alias
+ local.prefix = repo.prefix
+ local.hash = repo.hash
+ local.get_base_path = repo.get_base_path
+ local.exporter = GitExporter(local)
+ local.importer = GitImporter(local)
+
+ return local
+
+
+def do_capabilities(repo, args):
+ """Prints the supported capabilities.
+ """
+
+ print "import"
+ print "export"
+ print "refspec refs/heads/*:%s*" % repo.prefix
+
+ dirname = repo.get_base_path(repo.gitdir)
+
+ if not os.path.exists(dirname):
+ os.makedirs(dirname)
+
+ path = os.path.join(dirname, 'git.marks')
+
+ print "*export-marks %s" % path
+ if os.path.exists(path):
+ print "*import-marks %s" % path
+
+ print # end capabilities
+
+
+def do_list(repo, args):
+ """Lists all known references.
+
+ Bug: This will always set the remote head to master for non-local
+ repositories, since we have no way of determining what the remote
+ head is at clone time.
+ """
+
+ for ref in repo.revs:
+ debug("? refs/heads/%s", ref)
+ print "? refs/heads/%s" % ref
+
+ if repo.head:
+ debug("@refs/heads/%s HEAD" % repo.head)
+ print "@refs/heads/%s HEAD" % repo.head
+ else:
+ debug("@refs/heads/master HEAD")
+ print "@refs/heads/master HEAD"
+
+ print # end list
+
+
+def update_local_repo(repo):
+ """Updates (or clones) a local repo.
+ """
+
+ if repo.local:
+ return repo
+
+ path = repo.non_local.clone(repo.gitdir)
+ repo.non_local.update(repo.gitdir)
+ repo = local_repo(repo, path)
+ return repo
+
+
+def do_import(repo, args):
+ """Exports a fast-import stream from testgit for git to import.
+ """
+
+ if len(args) != 1:
+ die("Import needs exactly one ref")
+
+ if not repo.gitdir:
+ die("Need gitdir to import")
+
+ ref = args[0]
+ refs = [ref]
+
+ while True:
+ line = sys.stdin.readline()
+ if line == '\n':
+ break
+ if not line.startswith('import '):
+ die("Expected import line.")
+
+ # strip of leading 'import '
+ ref = line[7:].strip()
+ refs.append(ref)
+
+ repo = update_local_repo(repo)
+ repo.exporter.export_repo(repo.gitdir, refs)
+
+ print "done"
+
+
+def do_export(repo, args):
+ """Imports a fast-import stream from git to testgit.
+ """
+
+ if not repo.gitdir:
+ die("Need gitdir to export")
+
+ update_local_repo(repo)
+ changed = repo.importer.do_import(repo.gitdir)
+
+ if not repo.local:
+ repo.non_local.push(repo.gitdir)
+
+ for ref in changed:
+ print "ok %s" % ref
+ print
+
+
+COMMANDS = {
+ 'capabilities': do_capabilities,
+ 'list': do_list,
+ 'import': do_import,
+ 'export': do_export,
+}
+
+
+def sanitize(value):
+ """Cleans up the url.
+ """
+
+ if value.startswith('testgit::'):
+ value = value[9:]
+
+ return value
+
+
+def read_one_line(repo):
+ """Reads and processes one command.
+ """
+
+ sleepy = os.environ.get("GIT_REMOTE_TESTGIT_SLEEPY")
+ if sleepy:
+ debug("Sleeping %d sec before readline" % int(sleepy))
+ time.sleep(int(sleepy))
+
+ line = sys.stdin.readline()
+
+ cmdline = line
+
+ if not cmdline:
+ warn("Unexpected EOF")
+ return False
+
+ cmdline = cmdline.strip().split()
+ if not cmdline:
+ # Blank line means we're about to quit
+ return False
+
+ cmd = cmdline.pop(0)
+ debug("Got command '%s' with args '%s'", cmd, ' '.join(cmdline))
+
+ if cmd not in COMMANDS:
+ die("Unknown command, %s", cmd)
+
+ func = COMMANDS[cmd]
+ func(repo, cmdline)
+ sys.stdout.flush()
+
+ return True
+
+
+def main(args):
+ """Starts a new remote helper for the specified repository.
+ """
+
+ if len(args) != 3:
+ die("Expecting exactly three arguments.")
+ sys.exit(1)
+
+ if os.getenv("GIT_DEBUG_TESTGIT"):
+ import git_remote_helpers.util
+ git_remote_helpers.util.DEBUG = True
+
+ alias = sanitize(args[1])
+ url = sanitize(args[2])
+
+ if not alias.isalnum():
+ warn("non-alnum alias '%s'", alias)
+ alias = "tmp"
+
+ args[1] = alias
+ args[2] = url
+
+ repo = get_repo(alias, url)
+
+ debug("Got arguments %s", args[1:])
+
+ more = True
+
+ sys.stdin = os.fdopen(sys.stdin.fileno(), 'r', 0)
+ while (more):
+ more = read_one_line(repo)
+
+if __name__ == '__main__':
+ sys.exit(main(sys.argv))