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