Crate crepuscularity_native 

Lower .crepus templates to a JSON view tree for SwiftUI, Jetpack Compose, and future android-activity / objc2 shells.

Crate layout

• ir — serializable ViewIr / ViewNode / ViewStyle (the contract with shells).
• style — Tailwind-like class → style hints (extend here for GPUI parity).
• include_expand — include → (Vec<Node>, TemplateContext) without IR cycles.
• render — AST lowering and public render_* entry points.
• mutations — renderer-agnostic, path-based IR mutations and diffing.
• hot_reload — structured hot-reload protocol + conservative AST gate.

Sharing / codegen (bindgen, other repos)

• bindgen generates Rust FFI from C/C++ headers. It does not extract types from Rust for Swift/Kotlin, and it does not import arbitrary “other project” sources—it wraps existing native (C) APIs.
• Single source of truth options that do fit native shells:
  • schemars on ViewIr + JSON Schema → quicktype, OpenAPI generators, etc. for Swift/Kotlin.
  • A tiny build.rs that emits fixture.json and optional bindings (same repo or path dependency / git submodule).
  • Publish crepuscularity-native to crates.io and depend on it from another Rust workspace as usual.

Coverage vs GPUI / web

Not 100% parity with GPUI styler.rs—expand style.

Re-exports

pub use codegen::generate_native_source;

pub use codegen::NativeCodegenTarget;

pub use colors::resolve_rgba;

pub use hot_reload::ast_shape_compatible;

pub use hot_reload::plan_hot_reload;

pub use hot_reload::HotReloadEnvelope;

pub use hot_reload::HotReloadMessage;

pub use ir::PickerOption;

pub use ir::StackAxis;

pub use ir::ViewIr;

pub use ir::ViewNode;

pub use ir::ViewStyle;

pub use ir::IR_VERSION;

pub use mutations::apply_mutations;

pub use mutations::diff_ir;

pub use mutations::IrMutation;

Modules

codegen

colors

Tailwind CSS v4 colors and CSS color resolution for native View IR.

hot_reload

ir

JSON-serializable view intermediate representation (platform-neutral).

mutations

style

Maps Tailwind utility classes onto ViewStyle and stack alignment hints.

Enums

CrepusError

Primary error type for crate::parser, crate::eval, and related core APIs.

Functions

render_component_file_to_ir

Lower a named component from a multi-component .crepus file.

render_from_files

Render from a virtual file map (entry may use #Component suffix).

render_nodes_to_ir

Lower already-parsed nodes into a ViewIr.

render_template_to_ir

Parse and lower a template string to IR.

to_json

Serialize IR to JSON (compact).

to_json_pretty

Serialize IR to pretty-printed JSON (fixtures / debugging).