chris@1544: /*
chris@1544:  * svn-fast-export.c
chris@1544:  * ----------
chris@1544:  *  Walk through each revision of a local Subversion repository and export it
chris@1544:  *  in a stream that git-fast-import can consume.
chris@1544:  *
chris@1544:  * Author: Chris Lee <clee@kde.org>
chris@1544:  * License: MIT <http://www.opensource.org/licenses/mit-license.php>
chris@1544:  */
chris@1544: 
chris@1544: #define _XOPEN_SOURCE
chris@1544: #include <unistd.h>
chris@1544: #include <string.h>
chris@1544: #include <stdio.h>
chris@1544: #include <time.h>
chris@1544: 
chris@1544: #ifndef PATH_MAX
chris@1544: #define PATH_MAX 4096
chris@1544: #endif
chris@1544: 
chris@1544: #include <apr_lib.h>
chris@1544: #include <apr_getopt.h>
chris@1544: #include <apr_general.h>
chris@1544: 
chris@1544: #include <svn_fs.h>
chris@1544: #include <svn_repos.h>
chris@1544: #include <svn_pools.h>
chris@1544: #include <svn_types.h>
chris@1544: 
chris@1544: #undef SVN_ERR
chris@1544: #define SVN_ERR(expr) SVN_INT_ERR(expr)
chris@1544: #define apr_sane_push(arr, contents) *(char **)apr_array_push(arr) = contents
chris@1544: 
chris@1544: #define TRUNK "/trunk/"
chris@1544: 
chris@1544: time_t get_epoch(char *svn_date)
chris@1544: {
chris@1544:     struct tm tm = {0};
chris@1544:     char *date = malloc(strlen(svn_date) * sizeof(char *));
chris@1544:     strncpy(date, svn_date, strlen(svn_date) - 8);
chris@1544:     strptime(date, "%Y-%m-%dT%H:%M:%S", &tm);
chris@1544:     free(date);
chris@1544:     return mktime(&tm);
chris@1544: }
chris@1544: 
chris@1544: int dump_blob(svn_fs_root_t *root, char *full_path, apr_pool_t *pool)
chris@1544: {
chris@1544:     apr_size_t     len;
chris@1544:     svn_stream_t   *stream, *outstream;
chris@1544:     svn_filesize_t stream_length;
chris@1544: 
chris@1544:     SVN_ERR(svn_fs_file_length(&stream_length, root, full_path, pool));
chris@1544:     SVN_ERR(svn_fs_file_contents(&stream, root, full_path, pool));
chris@1544: 
chris@1544:     fprintf(stdout, "data %lu\n", stream_length);
chris@1544:     fflush(stdout);
chris@1544: 
chris@1544:     SVN_ERR(svn_stream_for_stdout(&outstream, pool));
chris@1544:     SVN_ERR(svn_stream_copy(stream, outstream, pool));
chris@1544: 
chris@1544:     fprintf(stdout, "\n");
chris@1544:     fflush(stdout);
chris@1544: 
chris@1544:     return 0;
chris@1544: }
chris@1544: 
chris@1544: int export_revision(svn_revnum_t rev, svn_fs_t *fs, apr_pool_t *pool)
chris@1544: {
chris@1544:     unsigned int         mark;
chris@1544:     const void           *key;
chris@1544:     void                 *val;
chris@1544:     char                 *path, *file_change;
chris@1544:     apr_pool_t           *revpool;
chris@1544:     apr_hash_t           *changes, *props;
chris@1544:     apr_hash_index_t     *i;
chris@1544:     apr_array_header_t   *file_changes;
chris@1544:     svn_string_t         *author, *committer, *svndate, *svnlog;
chris@1544:     svn_boolean_t        is_dir;
chris@1544:     svn_fs_root_t        *fs_root;
chris@1544:     svn_fs_path_change_t *change;
chris@1544: 
chris@1544:     fprintf(stderr, "Exporting revision %ld... ", rev);
chris@1544: 
chris@1544:     SVN_ERR(svn_fs_revision_root(&fs_root, fs, rev, pool));
chris@1544:     SVN_ERR(svn_fs_paths_changed(&changes, fs_root, pool));
chris@1544:     SVN_ERR(svn_fs_revision_proplist(&props, fs, rev, pool));
chris@1544: 
chris@1544:     revpool = svn_pool_create(pool);
chris@1544: 
chris@1544:     file_changes = apr_array_make(pool, apr_hash_count(changes), sizeof(char *));
chris@1544:     mark = 1;
chris@1544:     for (i = apr_hash_first(pool, changes); i; i = apr_hash_next(i)) {
chris@1544:         svn_pool_clear(revpool);
chris@1544:         apr_hash_this(i, &key, NULL, &val);
chris@1544:         path = (char *)key;
chris@1544:         change = (svn_fs_path_change_t *)val;
chris@1544: 
chris@1544:         SVN_ERR(svn_fs_is_dir(&is_dir, fs_root, path, revpool));
chris@1544: 
chris@1544:         if (is_dir || strncmp(TRUNK, path, strlen(TRUNK))) {
chris@1544:             continue;
chris@1544:         }
chris@1544: 
chris@1544:         if (change->change_kind == svn_fs_path_change_delete) {
chris@1544:             apr_sane_push(file_changes, (char *)svn_string_createf(pool, "D %s", path + strlen(TRUNK))->data);
chris@1544:         } else {
chris@1544:             apr_sane_push(file_changes, (char *)svn_string_createf(pool, "M 644 :%u %s", mark, path + strlen(TRUNK))->data);
chris@1544:             fprintf(stdout, "blob\nmark :%u\n", mark++);
chris@1544:             dump_blob(fs_root, (char *)path, revpool);
chris@1544:         }
chris@1544:     }
chris@1544: 
chris@1544:     if (file_changes->nelts == 0) {
chris@1544:         fprintf(stderr, "skipping.\n");
chris@1544:         svn_pool_destroy(revpool);
chris@1544:         return 0;
chris@1544:     }
chris@1544: 
chris@1544:     author = apr_hash_get(props, "svn:author", APR_HASH_KEY_STRING);
chris@1544:     if (svn_string_isempty(author))
chris@1544:         author = svn_string_create("nobody", pool);
chris@1544:     svndate = apr_hash_get(props, "svn:date", APR_HASH_KEY_STRING);
chris@1544:     svnlog = apr_hash_get(props, "svn:log", APR_HASH_KEY_STRING);
chris@1544: 
chris@1544:     fprintf(stdout, "commit refs/heads/master\n");
chris@1544:     fprintf(stdout, "committer %s <%s@localhost> %ld -0000\n", author->data, author->data, get_epoch((char *)svndate->data));
chris@1544:     fprintf(stdout, "data %d\n", svnlog->len);
chris@1544:     fputs(svnlog->data, stdout);
chris@1544:     fprintf(stdout, "\n");
chris@1544:     fputs(apr_array_pstrcat(pool, file_changes, '\n'), stdout);
chris@1544:     fprintf(stdout, "\n\n");
chris@1544:     fflush(stdout);
chris@1544: 
chris@1544:     svn_pool_destroy(revpool);
chris@1544: 
chris@1544:     fprintf(stderr, "done!\n");
chris@1544: 
chris@1544:     return 0;
chris@1544: }
chris@1544: 
chris@1544: int crawl_revisions(char *repos_path)
chris@1544: {
chris@1544:     apr_pool_t   *pool, *subpool;
chris@1544:     svn_fs_t     *fs;
chris@1544:     svn_repos_t  *repos;
chris@1544:     svn_revnum_t youngest_rev, min_rev, max_rev, rev;
chris@1544: 
chris@1544:     pool = svn_pool_create(NULL);
chris@1544: 
chris@1544:     SVN_ERR(svn_fs_initialize(pool));
chris@1544:     SVN_ERR(svn_repos_open(&repos, repos_path, pool));
chris@1544:     if ((fs = svn_repos_fs(repos)) == NULL)
chris@1544:         return -1;
chris@1544:     SVN_ERR(svn_fs_youngest_rev(&youngest_rev, fs, pool));
chris@1544: 
chris@1544:     min_rev = 1;
chris@1544:     max_rev = youngest_rev;
chris@1544: 
chris@1544:     subpool = svn_pool_create(pool);
chris@1544:     for (rev = min_rev; rev <= max_rev; rev++) {
chris@1544:         svn_pool_clear(subpool);
chris@1544:         export_revision(rev, fs, subpool);
chris@1544:     }
chris@1544: 
chris@1544:     svn_pool_destroy(pool);
chris@1544: 
chris@1544:     return 0;
chris@1544: }
chris@1544: 
chris@1544: int main(int argc, char *argv[])
chris@1544: {
chris@1544:     if (argc != 2) {
chris@1544:         fprintf(stderr, "usage: %s REPOS_PATH\n", argv[0]);
chris@1544:         return -1;
chris@1544:     }
chris@1544: 
chris@1544:     if (apr_initialize() != APR_SUCCESS) {
chris@1544:         fprintf(stderr, "You lose at apr_initialize().\n");
chris@1544:         return -1;
chris@1544:     }
chris@1544: 
chris@1544:     crawl_revisions(argv[1]);
chris@1544: 
chris@1544:     apr_terminate();
chris@1544: 
chris@1544:     return 0;
chris@1544: }