diff extra/fast-export/svn-fast-export.py @ 1544:e9e55585ebf2 feature_1136

Add fast-export

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extra/fast-export/svn-fast-export.py	Tue Jan 12 13:39:30 2016 +0000
@@ -0,0 +1,160 @@
+#!/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 <[e-mail]>
+# 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 sys, os.path
+from optparse import OptionParser
+from time import mktime, strptime
+from svn.fs import 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_paths_changed
+from svn.core import svn_pool_create, svn_pool_clear, svn_pool_destroy, 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")
+
+
+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 path.startswith(trunk_path):
+            # We don't handle branches. Or tags. Yet.
+            pass
+        else:
+            if c_t == 'D':
+                file_changes.append("D %s" % path.replace(trunk_path, ''))
+            else:
+                marks[i] = path.replace(trunk_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/master\n")
+    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',
+                      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
+
+    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 = ''
+
+    # 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)