Set prefix in snapshots when using dwimmery

This patch sets the directory prefix in archives to be the filename,
excluding the suffix (.tar.gz, .tar.bz2 etc).

The patch also removes the prefix parameter in cgit_print_snapshot()
as the prefix might differ.

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

cmd.c

@@ -104,8 +104,7 @@ static void refs_fn(struct cgit_context *ctx)
 
 static void snapshot_fn(struct cgit_context *ctx)
 {
-	cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1,
-			    cgit_repobasename(ctx->repo->url), ctx->qry.path,
+	cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1, ctx->qry.path,
 			    ctx->repo->snapshots, ctx->qry.nohead);
 }
 

ui-snapshot.c

@@ -162,10 +162,11 @@ static const char *get_ref_from_filename(const char *url, const char *filename,
 	return dwim_refname;
 }
 
-void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
+void cgit_print_snapshot(const char *head, const char *hex,
 			 const char *filename, int snapshots, int dwim)
 {
 	const struct cgit_snapshot_format* f;
+	char *prefix = NULL;
 
 	f = get_format(filename);
 	if (!f) {
@@ -178,11 +179,20 @@ void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
 		return;
 	}
 
-	if (!hex && dwim)
+	if (!hex && dwim) {
 		hex = get_ref_from_filename(ctx.repo->url, filename, f);
+		if (hex != NULL) {
+			prefix = xstrdup(filename);
+			prefix[strlen(filename) - strlen(f->suffix)] = '\0';
+		}
+	}
 
 	if (!hex)
 		hex = head;
 
+	if (!prefix)
+		prefix = xstrdup(cgit_repobasename(ctx.repo->url));
+
 	make_snapshot(f, hex, prefix, filename);
+	free(prefix);
 }

ui-snapshot.h

@@ -2,7 +2,6 @@
 #define UI_SNAPSHOT_H
 
 extern void cgit_print_snapshot(const char *head, const char *hex,
-				const char *prefix, const char *filename,
-				int snapshot, int dwim);
+				const char *filename, int snapshot, int dwim);
 
 #endif /* UI_SNAPSHOT_H */