Merge pull request #6 from aried3r/master
[fast-export.git] / svn-fast-export.c
blob34e7fc6c8330fc45165d63b5f797d6d84f031408
1 /*
2 * svn-fast-export.c
3 * ----------
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>
9 */
11 #define _XOPEN_SOURCE
12 #include <unistd.h>
13 #include <string.h>
14 #include <stdio.h>
15 #include <time.h>
17 #ifndef PATH_MAX
18 #define PATH_MAX 4096
19 #endif
21 #include <apr_lib.h>
22 #include <apr_getopt.h>
23 #include <apr_general.h>
25 #include <svn_fs.h>
26 #include <svn_repos.h>
27 #include <svn_pools.h>
28 #include <svn_types.h>
30 #undef SVN_ERR
31 #define SVN_ERR(expr) SVN_INT_ERR(expr)
32 #define apr_sane_push(arr, contents) *(char **)apr_array_push(arr) = contents
34 #define TRUNK "/trunk/"
36 time_t get_epoch(char *svn_date)
38 struct tm tm = {0};
39 char *date = malloc(strlen(svn_date) * sizeof(char *));
40 strncpy(date, svn_date, strlen(svn_date) - 8);
41 strptime(date, "%Y-%m-%dT%H:%M:%S", &tm);
42 free(date);
43 return mktime(&tm);
46 int dump_blob(svn_fs_root_t *root, char *full_path, apr_pool_t *pool)
48 apr_size_t len;
49 svn_stream_t *stream, *outstream;
50 svn_filesize_t stream_length;
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);
56 fflush(stdout);
58 SVN_ERR(svn_stream_for_stdout(&outstream, pool));
59 SVN_ERR(svn_stream_copy(stream, outstream, pool));
61 fprintf(stdout, "\n");
62 fflush(stdout);
64 return 0;
67 int export_revision(svn_revnum_t rev, svn_fs_t *fs, apr_pool_t *pool)
69 unsigned int mark;
70 const void *key;
71 void *val;
72 char *path, *file_change;
73 apr_pool_t *revpool;
74 apr_hash_t *changes, *props;
75 apr_hash_index_t *i;
76 apr_array_header_t *file_changes;
77 svn_string_t *author, *committer, *svndate, *svnlog;
78 svn_boolean_t is_dir;
79 svn_fs_root_t *fs_root;
80 svn_fs_path_change_t *change;
82 fprintf(stderr, "Exporting revision %ld... ", rev);
84 SVN_ERR(svn_fs_revision_root(&fs_root, fs, rev, pool));
85 SVN_ERR(svn_fs_paths_changed(&changes, fs_root, pool));
86 SVN_ERR(svn_fs_revision_proplist(&props, fs, rev, pool));
88 revpool = svn_pool_create(pool);
90 file_changes = apr_array_make(pool, apr_hash_count(changes), sizeof(char *));
91 mark = 1;
92 for (i = apr_hash_first(pool, changes); i; i = apr_hash_next(i)) {
93 svn_pool_clear(revpool);
94 apr_hash_this(i, &key, NULL, &val);
95 path = (char *)key;
96 change = (svn_fs_path_change_t *)val;
98 SVN_ERR(svn_fs_is_dir(&is_dir, fs_root, path, revpool));
100 if (is_dir || strncmp(TRUNK, path, strlen(TRUNK))) {
101 continue;
104 if (change->change_kind == svn_fs_path_change_delete) {
105 apr_sane_push(file_changes, (char *)svn_string_createf(pool, "D %s", path + strlen(TRUNK))->data);
106 } else {
107 apr_sane_push(file_changes, (char *)svn_string_createf(pool, "M 644 :%u %s", mark, path + strlen(TRUNK))->data);
108 fprintf(stdout, "blob\nmark :%u\n", mark++);
109 dump_blob(fs_root, (char *)path, revpool);
113 if (file_changes->nelts == 0) {
114 fprintf(stderr, "skipping.\n");
115 svn_pool_destroy(revpool);
116 return 0;
119 author = apr_hash_get(props, "svn:author", APR_HASH_KEY_STRING);
120 if (svn_string_isempty(author))
121 author = svn_string_create("nobody", pool);
122 svndate = apr_hash_get(props, "svn:date", APR_HASH_KEY_STRING);
123 svnlog = apr_hash_get(props, "svn:log", APR_HASH_KEY_STRING);
125 fprintf(stdout, "commit refs/heads/master\n");
126 fprintf(stdout, "committer %s <%s@localhost> %ld -0000\n", author->data, author->data, get_epoch((char *)svndate->data));
127 fprintf(stdout, "data %d\n", svnlog->len);
128 fputs(svnlog->data, stdout);
129 fprintf(stdout, "\n");
130 fputs(apr_array_pstrcat(pool, file_changes, '\n'), stdout);
131 fprintf(stdout, "\n\n");
132 fflush(stdout);
134 svn_pool_destroy(revpool);
136 fprintf(stderr, "done!\n");
138 return 0;
141 int crawl_revisions(char *repos_path)
143 apr_pool_t *pool, *subpool;
144 svn_fs_t *fs;
145 svn_repos_t *repos;
146 svn_revnum_t youngest_rev, min_rev, max_rev, rev;
148 pool = svn_pool_create(NULL);
150 SVN_ERR(svn_fs_initialize(pool));
151 SVN_ERR(svn_repos_open(&repos, repos_path, pool));
152 if ((fs = svn_repos_fs(repos)) == NULL)
153 return -1;
154 SVN_ERR(svn_fs_youngest_rev(&youngest_rev, fs, pool));
156 min_rev = 1;
157 max_rev = youngest_rev;
159 subpool = svn_pool_create(pool);
160 for (rev = min_rev; rev <= max_rev; rev++) {
161 svn_pool_clear(subpool);
162 export_revision(rev, fs, subpool);
165 svn_pool_destroy(pool);
167 return 0;
170 int main(int argc, char *argv[])
172 if (argc != 2) {
173 fprintf(stderr, "usage: %s REPOS_PATH\n", argv[0]);
174 return -1;
177 if (apr_initialize() != APR_SUCCESS) {
178 fprintf(stderr, "You lose at apr_initialize().\n");
179 return -1;
182 crawl_revisions(argv[1]);
184 apr_terminate();
186 return 0;