import { walkUp } from 'walk-up-path';
import { resolve } from 'node:path';
import { stat, readFile } from 'node:fs/promises';
import { statSync, readFileSync } from 'node:fs';
/**
* Determines if a file exists or not
* @param {string} path Path of the file
* @return {Promise<boolean>}
*/
async function fileExists(path) {
try {
const stats = await stat(path);
return stats.isFile();
}
catch (_err) {
return false;
}
}
/**
* Synchronously determines if a file exists or not
* @param {string} path Path of the file
* @return {boolean}
*/
function fileExistsSync(path) {
try {
const stats = statSync(path);
return stats.isFile();
}
catch (_err) {
return false;
}
}
/**
* Finds the path of the first `package.json` encountered when traversing
* the file system upwards from the specified `cwd`.
* @param {string} cwd Current/starting directory
* @return {Promise<string|null>}
*/
export async function findPackagePath(cwd) {
for (const path of walkUp(cwd)) {
const packagePath = resolve(path, 'package.json');
const hasPackageJson = await fileExists(packagePath);
if (hasPackageJson) {
return packagePath;
}
}
return null;
}
/**
* Finds and returns the contents of the first `package.json` encountered
* when traversing the file system upwards from the specified `cwd`.
* @param {string} cwd Current/starting directory
* @return {Promise<Package | null>}
*/
export async function findPackage(cwd) {
const packagePath = await findPackagePath(cwd);
if (!packagePath) {
return null;
}
try {
const source = await readFile(packagePath, { encoding: 'utf8' });
return JSON.parse(source);
}
catch (_err) {
return null;
}
}
/**
* Synchronously Finds the path of the first `package.json` encountered when
* traversing the file system upwards from the specified `cwd`.
* @param {string} cwd Current/starting directory
* @return {string|null}
*/
export function findPackagePathSync(cwd) {
for (const path of walkUp(cwd)) {
const packagePath = resolve(path, 'package.json');
const hasPackageJson = fileExistsSync(packagePath);
if (hasPackageJson) {
return packagePath;
}
}
return null;
}
/**
* Synchronously finds and returns the contents of the first `package.json`
* encountered when traversing the file system upwards from the specified `cwd`.
* @param {string} cwd Current/starting directory
* @return {Package | null}
*/
export function findPackageSync(cwd) {
const packagePath = findPackagePathSync(cwd);
if (!packagePath) {
return null;
}
try {
const source = readFileSync(packagePath, { encoding: 'utf8' });
return JSON.parse(source);
}
catch (_err) {
return null;
}
}