@netlify/build/lib/utils/resolve.js

Netlify build module

import { createRequire } from 'module';
import { async as resolveLib } from 'resolve';
// TODO: use `import.resolve()` once it is available without any experimental
// flags
const require = createRequire(import.meta.url);
// Like `resolvePath()` but does not throw
export const tryResolvePath = async function (path, basedir) {
    try {
        const resolvedPath = await resolvePath(path, basedir);
        return { path: resolvedPath };
    }
    catch (error) {
        return { error };
    }
};
// This throws if the package cannot be found
export const resolvePath = async function (path, basedir) {
    try {
        return await resolvePathWithBasedir(path, basedir);
        // Fallback.
        // `resolve` sometimes gives unhelpful error messages.
        // https://github.com/browserify/resolve/issues/223
    }
    catch {
        return require.resolve(path, { paths: [basedir] });
    }
};
// Like `require.resolve()` but as an external library.
// We need to use `new Promise()` due to a bug with `utils.promisify()` on
// `resolve`:
//   https://github.com/browserify/resolve/issues/151#issuecomment-368210310
const resolvePathWithBasedir = function (path, basedir) {
    return new Promise((resolve, reject) => {
        resolveLib(path, { basedir }, (error, resolvedPath) => {
            if (error) {
                return reject(error);
            }
            resolve(resolvedPath);
        });
    });
};