@augment-vir/node/dist/augments/typescript/read-tsconfig.js

A collection of augments, helpers types, functions, and classes only for Node.js (backend) JavaScript environments.

import { existsSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { parseJsonConfigFileContent, readConfigFile, sys } from 'typescript';
import { findAncestor } from '../path/ancestor.js';
/**
 * Finds the closest `tsconfig.json` file and parses it.
 *
 * @category Path : Node
 * @category Package : @augment-vir/node
 * @returns `undefined` if no tsconfig was found or if a found tsconfig fails to parse.
 * @package [`@augment-vir/node`](https://www.npmjs.com/package/@augment-vir/node)
 */
export function readTsconfig(startingPath) {
    const tsconfigDirPath = findAncestor(startingPath, (ancestorPath) => existsSync(join(ancestorPath, 'tsconfig.json')));
    const tsconfigPath = tsconfigDirPath ? join(tsconfigDirPath, 'tsconfig.json') : undefined;
    if (!tsconfigPath) {
        return undefined;
    }
    // eslint-disable-next-line @typescript-eslint/unbound-method
    const { config, error } = readConfigFile(tsconfigPath, sys.readFile);
    if (error) {
        return undefined;
    }
    const parsedConfig = parseJsonConfigFileContent(config, sys, dirname(tsconfigPath));
    if (parsedConfig.errors.length) {
        return undefined;
    }
    return {
        tsconfig: parsedConfig,
        path: tsconfigPath,
    };
}