Function main

tools/build-materials-from-json.ts:111–192

()

}

function main() {
  const argv = process.argv.slice(2);
  if (argv.length !== 2) {
    console.error('usage: build-materials-from-json.ts <input-dir> <output-ts>');
    process.exit(2);
  }
  const inputDir = path.resolve(argv[0]);
  const outputFile = path.resolve(argv[1]);

  if (!fs.existsSync(inputDir) || !fs.statSync(inputDir).isDirectory()) {
    console.error(`input dir not found or not a directory: ${inputDir}`);
    process.exit(2);
  }

  const files = fs
    .readdirSync(inputDir)
    .filter((f) => f.endsWith('.json'))
    .sort();

  if (files.length === 0) {
    console.error(`no .json files in ${inputDir}`);
    process.exit(2);
  }

  type Entry = { name: string; pascalName: string; constName: string; desc: MaterialJson };
  const entries: Entry[] = files.map((f) => {
    const stem = path.basename(f, '.json');
    const raw = fs.readFileSync(path.join(inputDir, f), 'utf8');
    let parsed: unknown;
    try { parsed = JSON.parse(raw); }
    catch (e) { console.error(`${f}: invalid JSON: ${(e as Error).message}`); process.exit(1); }
    try {
      return {
        name: stem,
        pascalName: pascal(stem),
        constName: `MAT_${snakeUpper(stem)}_DESC`,
        desc: validate(f, parsed),
      };
    } catch (e) {
      console.error((e as Error).message);
      process.exit(1);
    }
  });

  const lines: string[] = [];
  lines.push('// AUTO-GENERATED by engine/tools/build-materials-from-json.ts.');
  lines.push('// Do not edit. Regenerate from the source JSON via the build script.');
  lines.push('//');
  lines.push(`// Source: ${path.relative(process.cwd(), inputDir)}/*.json (${entries.length} file${entries.length === 1 ? '' : 's'})`);
  lines.push('');
  lines.push("import { loadMaterial, MaterialDesc } from 'bloom/models';");
  lines.push('');

  for (const e of entries) {
    lines.push(`export const ${e.constName}: MaterialDesc = {`);
    lines.push(`  shader: ${JSON.stringify(e.desc.shader)},`);
    lines.push(`  bucket: ${JSON.stringify(e.desc.bucket)}${emitParams(e.desc.params)}`);
    lines.push('};');