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/* 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_tar_gzip_archive(struct archiver_args *args)
{
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("gzip","gzip",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 const struct snapshot_archive_t {
const char *suffix;
const char *mimetype;
write_archive_fn_t write_func;
} snapshot_archives[] = {
{ ".zip", "application/x-zip", write_zip_archive },
{ ".tar.gz", "application/x-gzip", write_tar_gzip_archive }
};
void cgit_print_snapshot(struct cacheitem *item, const char *hex,
const char *prefix, const char *filename)
{
int fnl = strlen(filename);
int f;
for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
const struct snapshot_archive_t* sat = &snapshot_archives[f];
int sl = strlen(sat->suffix);
if(fnl<sl || strcmp(&filename[fnl-sl],sat->suffix))
continue;
struct archiver_args args;
struct commit *commit;
unsigned char sha1[20];
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;
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 *hex)
{
char *filename;
int f;
for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
const struct snapshot_archive_t* sat = &snapshot_archives[f];
filename = fmt("%s-%s%s",repo,hex,sat->suffix);
htmlf("<a href='%s'>%s</a><br/>",
cgit_pageurl(repo,"snapshot",
fmt("id=%s&name=%s",hex,filename)), filename);
}
}
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