//! Explicit Linux author inputs shared by opt-in native fixtures.
use std::path::{Path, PathBuf};

pub fn workspace() -> PathBuf {
    let root = std::env::var_os("DEVER_NATIVE_ACCEPTANCE_WORKSPACE")
        .map(PathBuf::from)
        .unwrap_or_else(|| Path::new(env!("CARGO_MANIFEST_DIR")).join("../.."));
    assert!(root.is_absolute());
    root
}

fn prepared_root() -> PathBuf {
    workspace().join("target/native-release-inputs")
}

pub fn core_libraries() -> Vec<(String, PathBuf)> {
    let mut inputs = std::fs::read_dir(prepared_root().join("core-libraries"))
        .expect("prepare the explicit GNU compiler-library closure")
        .map(|entry| {
            let entry = entry.unwrap();
            assert!(entry.file_type().unwrap().is_file());
            (entry.file_name().into_string().unwrap(), entry.path())
        })
        .collect::<Vec<_>>();
    assert!(!inputs.is_empty(), "compiler-library closure is empty");
    inputs.sort_by(|left, right| left.0.cmp(&right.0));
    inputs
}

pub fn native_inputs() -> Vec<(&'static str, PathBuf)> {
    let native = prepared_root().join("native");
    [
        "runtime.a",
        "crt1.o",
        "crti.o",
        "crtbeginT.o",
        "crtend.o",
        "crtn.o",
        "libc.a",
        "libm.a",
        "libmvec.a",
        "libgcc.a",
        "libgcc_eh.a",
    ]
    .into_iter()
    .map(|name| (name, native.join(name)))
    .collect()
}