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Implement Resource UIDs

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* Most resource types now have unique identifiers.
* Applies to text, binary and imported resources.
* File formats reference both by text and UID (when available). UID always has priority.
* Resource UIDs are 64 bits for better compatibility with the engine.
* Can be represented and used textually, example `uuid://dapwmgsmnl28u`.
* A special binary cache file is used and exported, containing the mappings.

Example of how it looks:

```GDScript
[gd_scene load_steps=2 format=3 uid="uid://dw86wq31afig2"]

[ext_resource type="PackedScene" uid="uid://bt36ojelx8q6c" path="res://subscene.scn" id="1_t56hs"]
```

GDScript, shaders and other special resource files can't currently provide UIDs, but this should be doable with special keywords on the files.
This will be reserved for future PRs.
This commit is contained in:
reduz
2021-07-23 16:01:18 -03:00
parent c25fa02c1c
commit 32b43cfeb3
25 changed files with 900 additions and 126 deletions
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5
core/io/resource_saver.h
View File

@ -48,6 +48,7 @@ public:
};
typedef void (*ResourceSavedCallback)(Ref<Resource> p_resource, const String &p_path);
typedef ResourceUID::ID (*ResourceSaverGetResourceIDForPath)(const String &p_path, bool p_generate);
class ResourceSaver {
enum {
@ -58,6 +59,7 @@ class ResourceSaver {
static int saver_count;
static bool timestamp_on_save;
static ResourceSavedCallback save_callback;
static ResourceSaverGetResourceIDForPath save_get_id_for_path;
static Ref<ResourceFormatSaver> _find_custom_resource_format_saver(String path);
@ -80,7 +82,10 @@ public:
static void set_timestamp_on_save(bool p_timestamp) { timestamp_on_save = p_timestamp; }
static bool get_timestamp_on_save() { return timestamp_on_save; }
static ResourceUID::ID get_resource_id_for_path(const String &p_path, bool p_generate = false);
static void set_save_callback(ResourceSavedCallback p_callback);
static void set_get_resource_id_for_path(ResourceSaverGetResourceIDForPath p_callback);
static bool add_custom_resource_format_saver(String script_path);
static void remove_custom_resource_format_saver(String script_path);