1 files changed, 132 insertions, 24 deletions

diff --git a/ui-snapshot.c b/ui-snapshot.c
index 2257d6b..bd34a28 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -8,40 +8,148 @@
 
 #include "cgit.h"
 
-static void cgit_print_zip(struct cacheitem *item, const char *hex, 
-			   const char *prefix, const char *filename)
+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);
 
-	if (get_sha1(hex, sha1)) {
-		cgit_print_error(fmt("Bad object id: %s", hex));
+	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;
+		cgit_print_snapshot_start(sat->mimetype, filename, item);
+		(*sat->write_func)(&args);
 		return;
 	}
-	commit = lookup_commit_reference(sha1);
+	cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
+}
 
-	if (!commit) {
-		cgit_print_error(fmt("Not a commit reference: %s", hex));
-		return;
-	}
+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;
 
-	memset(&args, 0, sizeof(args));
-	args.base = fmt("%s/", prefix);
-	args.tree = commit->tree;
-	
-	cgit_print_snapshot_start("application/x-zip", filename, item);
-	write_zip_archive(&args);
+	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/>");
+	}
 }
 
-
-void cgit_print_snapshot(struct cacheitem *item, const char *hex, 
-			 const char *format, const char *prefix,
-			 const char *filename)
+int cgit_parse_snapshots_mask(const char *str)
 {
-	if (!strcmp(format, "zip"))
-		cgit_print_zip(item, hex, prefix, filename);
-	else
-		cgit_print_error(fmt("Unsupported snapshot format: %s", 
-				     format));
+	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: */