nsb 0.1.1

Night-sky background evaluation and observation planning for ground-based astronomy.
Documentation 
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// SPDX-License-Identifier: AGPL-3.0-only
// Copyright (C) 2026 Vallés Puig, Ramon
//! Build-time scientific asset validation and codegen for the `nsb` crate.

pub mod generate;
pub mod types;
pub mod validate;

use self::generate::generate_bundled_assets_rs;
use self::validate::{
    parse_manifest, select_production_starlight, validate_manifest_structure,
    validate_runtime_embedded_files, verified_runtime_embedded_assets,
};
use std::env;
use std::fs;
use std::path::PathBuf;

const GENERATED: &str = "nsb_bundled_assets.rs";

/// Entry point invoked from `build.rs`.
pub fn run() {
    println!("cargo:rerun-if-changed=data/manifest.toml");
    println!("cargo:rustc-check-cfg=cfg(nsb_bundled_production_starlight)");

    let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
    let data_dir = manifest_dir.join("data");
    let manifest_path = data_dir.join("manifest.toml");
    let manifest_raw = fs::read_to_string(&manifest_path).unwrap_or_else(|err| {
        panic!("failed to read {}: {err}", manifest_path.display());
    });
    let manifest = parse_manifest(&manifest_raw).unwrap_or_else(|err| panic!("{err}"));
    validate_manifest_structure(&manifest).unwrap_or_else(|err| {
        panic!("scientific asset manifest validation failed: {err}");
    });
    validate_runtime_embedded_files(&data_dir, &manifest).unwrap_or_else(|err| {
        panic!("scientific asset integrity validation failed: {err}");
    });

    for asset in verified_runtime_embedded_assets(&manifest) {
        println!("cargo:rerun-if-changed=data/{}", asset.path);
    }

    let starlight = select_production_starlight(&manifest).unwrap_or_else(|err| panic!("{err}"));
    if starlight.is_some() {
        println!("cargo:rustc-cfg=nsb_bundled_production_starlight");
    }

    let verified = verified_runtime_embedded_assets(&manifest);
    let generated = generate_bundled_assets_rs(manifest.schema_version, &verified, starlight);
    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join(GENERATED);
    fs::write(&out_path, generated)
        .unwrap_or_else(|err| panic!("failed to write {}: {err}", out_path.display()));
}