Set a default urlpath if it is not returned by the API (fixes #6)

Author: BenoitZugmeyer

src/aur.c

@@ -304,6 +304,18 @@ static int json_end_map (void *ctx)
 	pkg_json->level -= 1;
 	if (pkg_json->level == 1 && pkg_json->pkg != NULL)
 	{
+		// If the urlpath isn't given by the API, build it based on the name. This fixes
+		// a compatibility issue between AUR v3 and v4 APIs.
+		if (aur_pkg_get_urlpath(pkg_json->pkg) == NULL)
+		{
+			const char *name = aur_pkg_get_name(pkg_json->pkg);
+			if (name != NULL) {
+				size_t size = strnlen(name, 200) + 34;
+				pkg_json->pkg->urlpath = malloc(sizeof(char) * size);
+				snprintf(pkg_json->pkg->urlpath, size, "/cgit/%s.git/snapshot/master.tar.gz", name);
+			}
+		}
+
 		switch (config.sort)
 		{
 			case S_VOTE: