4 * Walk through each revision of a local Subversion repository and export it
5 * in a stream that git-fast-import can consume.
7 * Author: Chris Lee <clee@kde.org>
8 * License: MIT <http://www.opensource.org/licenses/mit-license.php>
21 #include <apr_general.h>
23 #include <apr_getopt.h>
25 #include <svn_types.h>
26 #include <svn_pools.h>
27 #include <svn_repos.h>
30 #define SVN_ERR(expr) SVN_INT_ERR(expr)
31 #define apr_sane_push(arr, contents) *(char **)apr_array_push(arr) = contents
33 #define TRUNK "/trunk/"
35 time_t get_epoch(char *svn_date)
38 char *date = malloc(strlen(svn_date) * sizeof(char *));
39 strncpy(date, svn_date, strlen(svn_date) - 8);
40 strptime(date, "%Y-%m-%dT%H:%M:%S", &tm);
45 int dump_blob(svn_fs_root_t *root, char *full_path, apr_pool_t *pool)
47 svn_filesize_t stream_length;
48 svn_stream_t *stream, *outstream;
52 SVN_ERR(svn_fs_file_length(&stream_length, root, full_path, pool));
53 SVN_ERR(svn_fs_file_contents(&stream, root, full_path, pool));
55 fprintf(stdout, "data %lu\n", stream_length);
58 SVN_ERR(svn_stream_for_stdout(&outstream, pool));
59 SVN_ERR(svn_stream_copy(stream, outstream, pool));
61 fprintf(stdout, "\n");
67 int export_revision(svn_revnum_t rev, svn_repos_t *repo, svn_fs_t *fs, apr_pool_t *pool)
69 apr_array_header_t *file_changes;
70 apr_hash_t *changes, *props;
74 svn_fs_path_change_t *change;
75 svn_fs_root_t *root_obj;
77 svn_string_t *author, *committer, *svndate, *svnlog;
79 char *path, *file_change;
84 fprintf(stderr, "Exporting revision %ld... ", rev);
86 SVN_ERR(svn_fs_revision_root(&root_obj, fs, rev, pool));
87 SVN_ERR(svn_fs_paths_changed(&changes, root_obj, pool));
88 SVN_ERR(svn_fs_revision_proplist(&props, fs, rev, pool));
90 revpool = svn_pool_create(pool);
92 file_changes = apr_array_make(pool, apr_hash_count(changes), sizeof(char *));
94 for (i = apr_hash_first(pool, changes); i; i = apr_hash_next(i)) {
95 svn_pool_clear(revpool);
96 apr_hash_this(i, &key, NULL, &val);
98 change = (svn_fs_path_change_t *)val;
100 SVN_ERR(svn_fs_is_dir(&is_dir, root_obj, path, revpool));
102 if (is_dir || strncmp(TRUNK, path, strlen(TRUNK))) {
106 if (change->change_kind == svn_fs_path_change_delete) {
107 *(char **)apr_array_push(file_changes) = ((char *)svn_string_createf(pool, "D %s", path + strlen(TRUNK))->data);
110 *(char **)apr_array_push(file_changes) = (char *)svn_string_createf(pool, "M 644 :%u %s", mark, path + strlen(TRUNK))->data;
111 fprintf(stdout, "blob\nmark :%u\n", mark++);
112 dump_blob(root_obj, (char *)path, revpool);
116 if (file_changes->nelts == 0) {
117 fprintf(stderr, "skipping.\n");
118 svn_pool_destroy(revpool);
122 author = apr_hash_get(props, "svn:author", APR_HASH_KEY_STRING);
123 if (!author) { author = svn_string_create("nobody", pool); }
124 svndate = apr_hash_get(props, "svn:date", APR_HASH_KEY_STRING);
125 svnlog = apr_hash_get(props, "svn:log", APR_HASH_KEY_STRING);
127 fprintf(stdout, "commit refs/heads/master\n");
128 fprintf(stdout, "committer %s <%s@localhost> %ld -0000\n", author->data, author->data, get_epoch((char *)svndate->data));
129 fprintf(stdout, "data %d\n", svnlog->len);
130 fputs(svnlog->data, stdout);
131 fprintf(stdout, "\n");
132 fprintf(stdout, apr_array_pstrcat(pool, file_changes, '\n'));
133 fprintf(stdout, "\n\n");
136 svn_pool_destroy(revpool);
138 fprintf(stderr, "done!\n");
143 int crawl_revisions(char *repos_path)
145 apr_pool_t *pool, *subpool;
147 svn_revnum_t youngest_rev, min_rev, max_rev, rev;
150 pool = svn_pool_create(NULL);
152 SVN_ERR(svn_repos_open(&repos, repos_path, pool));
154 fs = svn_repos_fs(repos);
156 SVN_ERR(svn_fs_initialize(pool));
157 SVN_ERR(svn_fs_youngest_rev(&youngest_rev, fs, pool));
160 max_rev = youngest_rev;
162 subpool = svn_pool_create(pool);
163 for (rev = min_rev; rev <= max_rev; rev++) {
164 svn_pool_clear(subpool);
165 export_revision(rev, repos, fs, subpool);
168 svn_pool_destroy(pool);
173 int main(int argc, char *argv[])
176 fprintf(stderr, "usage: %s REPOS_PATH\n", argv[0]);
180 if (apr_initialize() != APR_SUCCESS) {
181 fprintf(stderr, "You lose at apr_initialize().\n");
185 crawl_revisions(argv[1]);