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//! Compile-time build logic for `build_comp!()` and `build_pathf!()`.
//!
//! The build steps run as a side effect of macro expansion (during `gen_program!`),
//! writing artifacts under `{target_directory}/mingling/`.
#[doc(hidden)]
#[cfg(feature = "comp")]
pub(crate) mod comp;
#[doc(hidden)]
#[cfg(feature = "pathf")]
pub(crate) mod pathf;
/// Shared implementation behind `build_comp!()`.
///
/// Accepts an optional string literal (the binary name); defaults to
/// `CARGO_PKG_NAME`. Returns an empty token stream on success, or a
/// `compile_error!` token stream on failure.
#[cfg(feature = "comp")]
pub(crate) fn comp_build_impl(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let bin_name: String = if input.is_empty() {
std::env::var("CARGO_PKG_NAME").unwrap_or_default()
} else {
match syn::parse::<syn::LitStr>(input) {
Ok(lit) => lit.value(),
Err(e) => return e.to_compile_error().into(),
}
};
match comp::build_comp_scripts(&bin_name) {
Ok(()) => proc_macro::TokenStream::new(),
Err(e) => {
let msg = format!("build_comp: failed to generate completion scripts: {e}");
syn::Error::new(proc_macro2::Span::call_site(), msg)
.to_compile_error()
.into()
}
}
}
/// Shared implementation behind `build_pathf!()`.
///
/// Runs the pathf type-mapping analysis. Returns an empty token stream on
/// success, or a `compile_error!` token stream on failure.
#[cfg(feature = "pathf")]
pub(crate) fn pathf_build_impl(_input: proc_macro::TokenStream) -> proc_macro::TokenStream {
match pathf::analyze_and_build_type_mapping() {
Ok(()) => proc_macro::TokenStream::new(),
Err(e) => {
let msg = format!("build_pathf: type mapping analysis failed: {e}");
syn::Error::new(proc_macro2::Span::call_site(), msg)
.to_compile_error()
.into()
}
}
}
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