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#!/usr/bin/python
#
# svn-fast-export.py
# ----------
# Walk through each revision of a local Subversion repository and export it
# in a stream that git-fast-import can consume.
#
# Author: Chris Lee <clee@kde.org>
# License: MIT <http://www.opensource.org/licenses/mit-license.php>
trunk_path = '/trunk/'
branches_path = '/branches/'
tags_path = '/tags/'
first_rev = 1
final_rev = 0
import gc, sys, os.path
from optparse import OptionParser
from time import sleep, mktime, localtime, strftime, strptime
from svn.fs import svn_fs_dir_entries, svn_fs_file_length, svn_fs_file_contents, svn_fs_is_dir, svn_fs_revision_root, svn_fs_youngest_rev, svn_fs_revision_proplist, svn_fs_revision_prop, svn_fs_paths_changed
from svn.core import svn_pool_create, svn_pool_clear, svn_pool_destroy, svn_stream_read, svn_stream_for_stdout, svn_stream_copy, svn_stream_close, run_app
from svn.repos import svn_repos_open, svn_repos_fs
ct_short = ['M', 'A', 'D', 'R', 'X']
def dump_file_blob(root, full_path, pool):
stream_length = svn_fs_file_length(root, full_path, pool)
stream = svn_fs_file_contents(root, full_path, pool)
sys.stdout.write("data %s\n" % stream_length)
sys.stdout.flush()
ostream = svn_stream_for_stdout(pool)
svn_stream_copy(stream, ostream, pool)
svn_stream_close(ostream)
sys.stdout.write("\n")
class Matcher(object):
branch = None
def __init__(self, trunk_path):
self.trunk_path = trunk_path
def branchname(self):
return self.branch
def __str__(self):
return super(Matcher, self).__str__() + ":" + self.trunk_path
@staticmethod
def getMatcher(trunk_path):
if trunk_path.startswith("regex:"):
return RegexStringMatcher(trunk_path)
else:
return StaticStringMatcher(trunk_path)
class StaticStringMatcher(Matcher):
branch = "master"
def matches(self, path):
return path.startswith(trunk_path)
def replace(self, path):
return path.replace(self.trunk_path, '')
class RegexStringMatcher(Matcher):
def __init__(self, trunk_path):
super(RegexStringMatcher, self).__init__(trunk_path)
import re
self.matcher = re.compile(self.trunk_path[len("regex:"):])
def matches(self, path):
match = self.matcher.match(path)
if match:
self.branch = match.group(1)
return True
else:
return False
def replace(self, path):
return self.matcher.sub("\g<2>", path)
MATCHER = None
def export_revision(rev, repo, fs, pool):
sys.stderr.write("Exporting revision %s... " % rev)
revpool = svn_pool_create(pool)
svn_pool_clear(revpool)
# Open a root object representing the youngest (HEAD) revision.
root = svn_fs_revision_root(fs, rev, revpool)
# And the list of what changed in this revision.
changes = svn_fs_paths_changed(root, revpool)
i = 1
marks = {}
file_changes = []
for path, change_type in changes.iteritems():
c_t = ct_short[change_type.change_kind]
if svn_fs_is_dir(root, path, revpool):
continue
if not MATCHER.matches(path):
# We don't handle branches. Or tags. Yet.
pass
else:
if c_t == 'D':
file_changes.append("D %s" % MATCHER.replace(path))
else:
marks[i] = MATCHER.replace(path)
file_changes.append("M 644 :%s %s" % (i, marks[i]))
sys.stdout.write("blob\nmark :%s\n" % i)
dump_file_blob(root, path, revpool)
i += 1
# Get the commit author and message
props = svn_fs_revision_proplist(fs, rev, revpool)
# Do the recursive crawl.
if props.has_key('svn:author'):
author = "%s <%s@localhost>" % (props['svn:author'], props['svn:author'])
else:
author = 'nobody <nobody@localhost>'
if len(file_changes) == 0:
svn_pool_destroy(revpool)
sys.stderr.write("skipping.\n")
return
svndate = props['svn:date'][0:-8]
commit_time = mktime(strptime(svndate, '%Y-%m-%dT%H:%M:%S'))
sys.stdout.write("commit refs/heads/%s\n" % MATCHER.branchname())
sys.stdout.write("committer %s %s -0000\n" % (author, int(commit_time)))
sys.stdout.write("data %s\n" % len(props['svn:log']))
sys.stdout.write(props['svn:log'])
sys.stdout.write("\n")
sys.stdout.write('\n'.join(file_changes))
sys.stdout.write("\n\n")
svn_pool_destroy(revpool)
sys.stderr.write("done!\n")
#if rev % 1000 == 0:
# sys.stderr.write("gc: %s objects\n" % len(gc.get_objects()))
# sleep(5)
def crawl_revisions(pool, repos_path):
"""Open the repository at REPOS_PATH, and recursively crawl all its
revisions."""
global final_rev
# Open the repository at REPOS_PATH, and get a reference to its
# versioning filesystem.
repos_obj = svn_repos_open(repos_path, pool)
fs_obj = svn_repos_fs(repos_obj)
# Query the current youngest revision.
youngest_rev = svn_fs_youngest_rev(fs_obj, pool)
first_rev = 1
if final_rev == 0:
final_rev = youngest_rev
for rev in xrange(first_rev, final_rev + 1):
export_revision(rev, repos_obj, fs_obj, pool)
if __name__ == '__main__':
usage = '%prog [options] REPOS_PATH'
parser = OptionParser()
parser.set_usage(usage)
parser.add_option('-f', '--final-rev', help='Final revision to import',
dest='final_rev', metavar='FINAL_REV', type='int')
parser.add_option('-t', '--trunk-path', help="Path in repo to /trunk, may be `regex:/cvs/(trunk)/proj1/(.*)`\nFirst group is used as branchname, second to match files",
dest='trunk_path', metavar='TRUNK_PATH')
parser.add_option('-b', '--branches-path', help='Path in repo to /branches',
dest='branches_path', metavar='BRANCHES_PATH')
parser.add_option('-T', '--tags-path', help='Path in repo to /tags',
dest='tags_path', metavar='TAGS_PATH')
(options, args) = parser.parse_args()
if options.trunk_path != None:
trunk_path = options.trunk_path
if options.branches_path != None:
branches_path = options.branches_path
if options.tags_path != None:
tags_path = options.tags_path
if options.final_rev != None:
final_rev = options.final_rev
MATCHER = Matcher.getMatcher(trunk_path)
sys.stderr.write("%s\n" % MATCHER)
if len(args) != 1:
parser.print_help()
sys.exit(2)
# Canonicalize (enough for Subversion, at least) the repository path.
repos_path = os.path.normpath(args[0])
if repos_path == '.':
repos_path = ''
try:
import msvcrt
msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
except ImportError:
pass
# Call the app-wrapper, which takes care of APR initialization/shutdown
# and the creation and cleanup of our top-level memory pool.
run_app(crawl_revisions, repos_path)
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