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7aeaa2fc0a
Currently the remote helper infrastructure is only used by the curl helper, which does not give a good impression of how remote helpers can be used to interact with foreign repositories. Since implementing such a helper is non-trivial it would be good to have at least one easy-to-follow example demonstrating how to implement a helper that interacts with a foreign vcs using fast-import/fast-export. The testgit helper can be used to interact with remote git repositories by prefixing the url with "testgit::". Signed-off-by: Junio C Hamano <gitster@pobox.com>
52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
import os
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import subprocess
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import sys
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class GitExporter(object):
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"""An exporter for testgit repositories.
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The exporter simply delegates to git fast-export.
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"""
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def __init__(self, repo):
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"""Creates a new exporter for the specified repo.
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"""
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self.repo = repo
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def export_repo(self, base):
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"""Exports a fast-export stream for the given directory.
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Simply delegates to git fast-epxort and pipes it through sed
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to make the refs show up under the prefix rather than the
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default refs/heads. This is to demonstrate how the export
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data can be stored under it's own ref (using the refspec
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capability).
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"""
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dirname = self.repo.get_base_path(base)
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path = os.path.abspath(os.path.join(dirname, 'testgit.marks'))
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if not os.path.exists(dirname):
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os.makedirs(dirname)
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print "feature relative-marks"
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if os.path.exists(os.path.join(dirname, 'git.marks')):
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print "feature import-marks=%s/git.marks" % self.repo.hash
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print "feature export-marks=%s/git.marks" % self.repo.hash
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sys.stdout.flush()
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args = ["git", "--git-dir=" + self.repo.gitpath, "fast-export", "--export-marks=" + path]
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if os.path.exists(path):
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args.append("--import-marks=" + path)
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args.append("HEAD")
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p1 = subprocess.Popen(args, stdout=subprocess.PIPE)
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args = ["sed", "s_refs/heads/_" + self.repo.prefix + "_g"]
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subprocess.check_call(args, stdin=p1.stdout)
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