util/uuid: replace with util/token, remove libuuid

Use 128-bit hexadecimal string tokens generated with /dev/urandom
instead of UUIDs for xdg-foreign handles, removing the libuuid
dependency. Update readme and CI. Closes #2830.

build: remove xdg-foreign feature

With no external dependencies required, there's no reason not to always
build it. Remove WLR_HAS_XDG_FOREIGN as well.

1 files changed, 0 insertions, 34 deletions

diff --git a/util/uuid.c b/util/uuid.c
deleted file mode 100644
index 82e310b9..00000000
--- a/util/uuid.c
+++ /dev/null
@@ -1,34 +0,0 @@
-#include <uuid.h>
-#include "util/uuid.h"
-
-#if HAS_LIBUUID
-bool generate_uuid(char out[static 37]) {
-	uuid_t uuid;
-	uuid_generate_random(uuid);
-	uuid_unparse(uuid, out);
-	return true;
-}
-#else
-#include <assert.h>
-#include <string.h>
-#include <stdlib.h>
-
-bool generate_uuid(char out[static 37]) {
-	uuid_t uuid;
-	uint32_t status;
-	uuid_create(&uuid, &status);
-	if (status != uuid_s_ok) {
-		return false;
-	}
-	char *str;
-	uuid_to_string(&uuid, &str, &status);
-	if (status != uuid_s_ok) {
-		return false;
-	}
-
-	assert(strlen(str) + 1 == 37);
-	memcpy(out, str, 37);
-	free(str);
-	return true;
-}
-#endif