import { existsSync } from "fs";
import grabDirNames from "../utils/grab-dir-names";
import { DistDirEnvName, resolveDistDir } from "../utils/grab-dist-dir";
/**
 * # Set the dist directory for this process and its children
 * Precedence: `params.dist_dir` (the CLI's `--dist-dir`), then an existing
 * `BUNEXT_DIST_DIR` env var, then `dist_dir` from bunext.config.ts. Stores
 * the absolute path in `BUNEXT_DIST_DIR`, which `grabDirNames()` reads and
 * child processes inherit. Runs at the start of every CLI command and of
 * `bunextInit()`, before anything reads the artifact paths. Throws on an
 * invalid directory.
 */
export default async function setupDistDir(params) {
    const root_dir = process.cwd();
    const dist_dir = params?.dist_dir ||
        process.env[DistDirEnvName] ||
        (await grabConfigDistDir());
    if (!dist_dir)
        return;
    process.env[DistDirEnvName] = resolveDistDir({ dist_dir, root_dir });
}
async function grabConfigDistDir() {
    const { CONFIG_FILE } = grabDirNames();
    if (!existsSync(CONFIG_FILE))
        return;
    try {
        const config = (await import(CONFIG_FILE)).default;
        return config?.dist_dir;
    }
    catch (error) {
        // The config is loaded again later, which reports the error.
        return;
    }
}