initial work to rewrite the elements logic for hotreload

packages/manganis/manganis-core/src/lib.rs

@@ -16,4 +16,7 @@ pub use js::*;
 mod asset;
 pub use asset::*;
 
+mod metadata;
+pub use metadata::*;
+
 pub mod linker;

packages/manganis/manganis-core/src/metadata.rs

@@ -0,0 +1,32 @@
+use const_serialize::{ConstStr, SerializeConst};
+use std::path::PathBuf;
+
+#[derive(
+    Debug,
+    PartialEq,
+    PartialOrd,
+    Clone,
+    Copy,
+    Hash,
+    SerializeConst,
+    serde::Serialize,
+    serde::Deserialize,
+)]
+pub struct Metadata {
+    key: ConstStr,
+    value: ConstStr,
+    keep_link_section: fn() -> u8,
+}
+
+impl Metadata {
+    #[doc(hidden)]
+    /// This should only be called from the macro
+    /// Create a new metadata
+    pub const fn new(key: &'static str, value: &'static str, keep_link_section: fn() -> u8) -> Self {
+        Self {
+            key: ConstStr::new(key),
+            value: ConstStr::new(value),
+            keep_link_section,
+        }
+    }
+}

packages/manganis/manganis/src/macro_helpers.rs

@@ -132,6 +132,12 @@ pub const fn serialize_asset(asset: &BundledAsset) -> ConstVec<u8> {
     serialize_const(asset, write)
 }
 
+/// Serialize metadata to a const buffer
+pub const fn selialize_metadata(metadata: &BundledMetadata) -> ConstVec<u8> {
+    let write = ConstVec::new();
+    serialize_const(metadata, write)
+}
+
 /// Copy a slice into a constant sized buffer at compile time
 pub const fn copy_bytes<const N: usize>(bytes: &[u8]) -> [u8; N] {
     let mut out = [0; N];