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use mingling::{Program, macros::program_setup};
use crate::ThisProgram;
/// Manifest that declares the documented feature list.
///
/// Path is relative to the repo root (the CI's working directory).
const FEATURES_MANIFEST: &str = "./mingling/Cargo.toml";
/// The docs.rs feature list of `mingling`, the single source of truth for the
/// feature combinations used by CI checks.
#[derive(Default, Clone)]
pub struct ResFeatureList {
pub list: Vec<String>,
}
#[program_setup]
pub fn features_setup(p: &mut Program<ThisProgram>) {
p.with_resource(ResFeatureList {
list: docs_rs_features(),
});
}
/// Reads `[package.metadata.docs.rs].features` from `mingling/Cargo.toml`.
#[must_use]
fn docs_rs_features() -> Vec<String> {
let Ok(content) = std::fs::read_to_string(FEATURES_MANIFEST) else {
return Vec::new();
};
let Ok(toml_value) = content.parse::<toml::Value>() else {
return Vec::new();
};
toml_value
.get("package")
.and_then(|p| p.get("metadata"))
.and_then(|m| m.get("docs"))
.and_then(|d| d.get("rs"))
.and_then(|rs| rs.get("features"))
.and_then(|f| f.as_array())
.map(|features| {
features
.iter()
.filter_map(|v| v.as_str().map(str::to_string))
.collect()
})
.unwrap_or_default()
}
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