Refactor snapshot support

The snapshot support needs to be split between output- and config-related
functions to get the layering between shared.c and ui-*.c right. There
is also some codestyle-issues which needs fixing to make the snapshot
functions more similar to the rest of the cgit code.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 39 insertions, 85 deletions

diff --git a/ui-snapshot.c b/ui-snapshot.c
index c741469..512fcd2 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -10,150 +10,104 @@
 #include "html.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[] = {
+const struct cgit_snapshot_format cgit_snapshot_formats[] = {
 	{ ".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 }
+	{ ".tar", "application/x-tar", write_tar_archive, 0x8 },
+	{}
 };
 
-#define snapshot_archives_len (sizeof(snapshot_archives) / sizeof(*snapshot_archives))
-
-void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
-			 const char *filename, int snapshots)
+static int make_snapshot(const struct cgit_snapshot_format *format,
+			 const char *hex, const char *prefix,
+			 const char *filename)
 {
-	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;
-		ctx.page.mimetype = xstrdup(sat->mimetype);
-		ctx.page.filename = xstrdup(filename);
-		cgit_print_http_headers(&ctx);
-		(*sat->write_func)(&args);
-		return;
+	if(get_sha1(hex, sha1)) {
+		cgit_print_error(fmt("Bad object id: %s", hex));
+		return 1;
 	}
-	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/>");
+	commit = lookup_commit_reference(sha1);
+	if(!commit) {
+		cgit_print_error(fmt("Not a commit reference: %s", hex));
+		return 1;
 	}
+	memset(&args, 0, sizeof(args));
+	args.base = fmt("%s/", prefix);
+	args.tree = commit->tree;
+	args.time = commit->date;
+	ctx.page.mimetype = xstrdup(format->mimetype);
+	ctx.page.filename = xstrdup(filename);
+	cgit_print_http_headers(&ctx);
+	format->write_func(&args);
+	return 0;
 }
 
-int cgit_parse_snapshots_mask(const char *str)
+void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
+			 const char *filename, int snapshots)
 {
-	const struct snapshot_archive_t* sat;
-	static const char *delim = " \t,:/|;";
-	int f, tl, sl, 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];
-			sl = strlen(sat->suffix);
-			if((tl == sl && !strncmp(sat->suffix, str, tl)) ||
-			   (tl == sl-1 && !strncmp(sat->suffix+1, str, tl-1))) {
-				rv |= sat->bit;
-				break;
-			}
-		}
-		str += tl;
+	const struct cgit_snapshot_format* f;
+	int sl, fnl;
+
+	fnl = strlen(filename);
+	if (!hex)
+		hex = head;
+	for (f = cgit_snapshot_formats; f->suffix; f++) {
+		if (!(snapshots & f->bit))
+			continue;
+		sl = strlen(f->suffix);
+		if(fnl < sl || strcmp(&filename[fnl-sl], f->suffix))
+			continue;
+		make_snapshot(f, hex, prefix, filename);
+		return;
 	}
-	return rv;
+	cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
 }
-
-/* vim:set sw=8: */