/* ui-snapshot.c: generate snapshot of a commit
*
* Copyright (C) 2006 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
static int write_compressed_tar_archive(struct archiver_args *args,const char *filter)
{
int rw[2];
pid_t gzpid;
int stdout2;
int status;
int rv;
stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing");
chk_zero(pipe(rw), "Opening pipe from compressor subprocess");
gzpid = chk_non_negative(fork(), "Forking compressor subprocess");
if(gzpid==0) {
/* child */
chk_zero(close(rw[1]), "Closing write end of pipe in child");
chk_zero(close(STDIN_FILENO), "Closing STDIN");
chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin");
execlp(filter,filter,NULL);
_exit(-1);
}
/* parent */
chk_zero(close(rw[0]), "Closing read end of pipe");
chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor");
rv = write_tar_archive(args);
chk_zero(close(STDOUT_FILENO), "Closing STDOUT redirected to compressor");
chk_non_negative(dup2(stdout2,STDOUT_FILENO), "Restoring uncompressed STDOUT");
chk_zero(close(stdout2), "Closing uncompressed STDOUT");
chk_zero(close(rw[1]), "Closing write end of pipe in parent");
chk_positive(waitpid(gzpid,&status,0), "Waiting on compressor process");
if(! ( WIFEXITED(status) && WEXITSTATUS(status)==0 ) )
cgit_print_error("Failed to compress archive");
return rv;
}
static int write_tar_gzip_archive(struct archiver_args *args)
{
return write_compressed_tar_archive(args,"gzip");
}
static int write_tar_bzip2_archive(struct archiver_args *args)
{
return write_compressed_tar_archive(args,"bzip2");
}
static const struct snapshot_archive_t {
const char *suffix;
const char *mimetype;
write_archive_fn_t write_func;
int bit;
} snapshot_archives[] = {
{ ".zip", "application/x-zip", write_zip_archive, 0x1 },
{ ".tar.gz", "application/x-tar", write_tar_gzip_archive, 0x2 },
{ ".tar.bz2", "application/x-tar", write_tar_bzip2_archive, 0x4 },
{ ".tar", "application/x-tar", write_tar_archive, 0x8 }
};
#define snapshot_archives_len (sizeof(snapshot_archives) / sizeof(*snapshot_archives))
void cgit_print_snapshot(struct cacheitem *item, const char *head,
const char *hex, const char *prefix,
const char *filename, int snapshots)
{
const struct snapshot_archive_t* sat;
struct archiver_args args;
struct commit *commit;
unsigned char sha1[20];
int f, sl, fnl = strlen(filename);
for(f=0; f<snapshot_archives_len; f++) {
sat = &snapshot_archives[f];
if(!(snapshots & sat->bit))
continue;
sl = strlen(sat->suffix);
if(fnl<sl || strcmp(&filename[fnl-sl],sat->suffix))
continue;
if (!hex)
hex = head;
if(get_sha1(hex, sha1)) {
cgit_print_error(fmt("Bad object id: %s", hex));
return;
}
commit = lookup_commit_reference(sha1);
if(!commit) {
cgit_print_error(fmt("Not a commit reference: %s", hex));
return;;
}
memset(&args,0,sizeof(args));
args.base = fmt("%s/", prefix);
args.tree = commit->tree;
args.time = commit->date;
cgit_print_snapshot_start(sat->mimetype, filename, item);
(*sat->write_func)(&args);
return;
}
cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
}
void cgit_print_snapshot_links(const char *repo, const char *head,
const char *hex, int snapshots)
{
const struct snapshot_archive_t* sat;
char *filename;
int f;
for(f=0; f<snapshot_archives_len; f++) {
sat = &snapshot_archives[f];
if(!(snapshots & sat->bit))
continue;
filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
sat->suffix);
cgit_snapshot_link(filename, NULL, NULL, (char *)head,
(char *)hex, filename);
html("<br/>");
}
}
int cgit_parse_snapshots_mask(const char *str)
{
const struct snapshot_archive_t* sat;
static const char *delim = " \t,:/|;";
int f, tl, rv = 0;
/* favor legacy setting */
if(atoi(str))
return 1;
for(;;) {
str += strspn(str,delim);
tl = strcspn(str,delim);
if(!tl)
break;
for(f=0; f<snapshot_archives_len; f++) {
sat = &snapshot_archives[f];
if(!(strncmp(sat->suffix, str, tl) &&
strncmp(sat->suffix+1, str, tl-1))) {
rv |= sat->bit;
break;
}
}
str += tl;
}
return rv;
}
/* vim:set sw=8: */
