105 lines
4.6 KiB
JavaScript
105 lines
4.6 KiB
JavaScript
'use strict'
|
|
const { extname, isAbsolute, dirname } = require('path')
|
|
const { access, accessSync, constants: { F_OK } } = require('fs')
|
|
const { promisify, callbackify } = require('util')
|
|
const readPkgUp = callbackify(require('read-pkg-up'))
|
|
|
|
const isFileEsmPromise = promisify(isFileEsm)
|
|
|
|
const tick = queueMicrotask
|
|
|
|
const ERR_PATH_MUST_BE_STRING = 'is-esm: path must be a string'
|
|
const ERR_PATH_MUST_BE_ABSOLUTE = 'is-esm: absolute paths only'
|
|
const ERR_PATH_MUST_EXIST = 'is-esm: path does not exist'
|
|
const ERR_PATH_MUST_HAVE_VALID_EXT = 'is-esm: path must be to a file with an extension of .js, .mjs or .cjs'
|
|
|
|
function isFileEsm (path, cb) {
|
|
if (arguments.length <= 1) return isFileEsmPromise(path)
|
|
if (typeof path !== 'string') return void tick(() => cb(Error(ERR_PATH_MUST_BE_STRING)))
|
|
if (isAbsolute(path) === false) return void tick(() => cb(Error(ERR_PATH_MUST_BE_ABSOLUTE)))
|
|
const extMatch = /\.(c|m)?js/.exec(extname(path))
|
|
if (extMatch === null) return void tick(() => cb(Error(ERR_PATH_MUST_HAVE_VALID_EXT)))
|
|
access(path, F_OK, (err) => {
|
|
if (err) return void cb(Error(ERR_PATH_MUST_EXIST))
|
|
const [, extType = 'j'] = extMatch
|
|
const cwd = dirname(path)
|
|
readPkgUp({ cwd }, (err, pkg) => {
|
|
if (err) return void cb(err)
|
|
const { type } = pkg.packageJson
|
|
switch (type) {
|
|
case undefined: {
|
|
if (extType === 'j') return void cb(null, { esm: false, type, extType, path, pkgPath: pkg.path })
|
|
if (extType === 'm') return void cb(null, { esm: true, type, extType, path, pkgPath: pkg.path })
|
|
/* istanbul ignore else */
|
|
if (extType === 'c') return void cb(null, { esm: false, type, extType, path, pkgPath: pkg.path })
|
|
// unreachable
|
|
}
|
|
case 'commonjs': {
|
|
if (extType === 'j') return void cb(null, { esm: false, type, extType, path, pkgPath: pkg.path })
|
|
if (extType === 'm') return void cb(null, { esm: true, type, extType, path, pkgPath: pkg.path })
|
|
/* istanbul ignore else */
|
|
if (extType === 'c') return void cb(null, { esm: false, type, extType, path, pkgPath: pkg.path })
|
|
// unreachable
|
|
}
|
|
case 'module': {
|
|
if (extType === 'j') return void cb(null, { esm: true, type, extType, path, pkgPath: pkg.path })
|
|
if (extType === 'm') return void cb(null, { esm: true, type, extType, path, pkgPath: pkg.path })
|
|
/* istanbul ignore else */
|
|
if (extType === 'c') return void cb(null, { esm: false, type, extType, path, pkgPath: pkg.path })
|
|
// unreachable
|
|
}
|
|
default: return void cb(Object.assign(Error(`package.json type "${type}" not recognized`), { meta: { type, extType, path, pkgPath: pkg.path } }))
|
|
}
|
|
})
|
|
})
|
|
}
|
|
|
|
isFileEsm.sync = function isFileEsmSync (path) {
|
|
if (typeof path !== 'string') throw Error(ERR_PATH_MUST_BE_STRING)
|
|
if (isAbsolute(path) === false) throw Error(ERR_PATH_MUST_BE_ABSOLUTE)
|
|
const extMatch = /\.(c|m)?js/.exec(extname(path))
|
|
if (extMatch === null) throw Error(ERR_PATH_MUST_HAVE_VALID_EXT)
|
|
try {
|
|
accessSync(path, F_OK)
|
|
} catch (err) {
|
|
throw Error(ERR_PATH_MUST_EXIST)
|
|
}
|
|
const [, extType = 'j'] = extMatch
|
|
const cwd = dirname(path)
|
|
const pkg = readPkgUp.sync({ cwd })
|
|
const { type } = pkg.packageJson
|
|
switch (type) {
|
|
case undefined: {
|
|
if (extType === 'j') return { esm: false, type, extType, path, pkgPath: pkg.path }
|
|
if (extType === 'm') return { esm: true, type, extType, path, pkgPath: pkg.path }
|
|
/* istanbul ignore else */
|
|
if (extType === 'c') return { esm: false, type, extType, path, pkgPath: pkg.path }
|
|
// unreachable
|
|
}
|
|
case 'commonjs': {
|
|
if (extType === 'j') return { esm: false, type, extType, path, pkgPath: pkg.path }
|
|
if (extType === 'm') return { esm: true, type, extType, path, pkgPath: pkg.path }
|
|
/* istanbul ignore else */
|
|
if (extType === 'c') return { esm: false, type, extType, path, pkgPath: pkg.path }
|
|
// unreachable
|
|
}
|
|
case 'module': {
|
|
if (extType === 'j') return { esm: true, type, extType, path, pkgPath: pkg.path }
|
|
if (extType === 'm') return { esm: true, type, extType, path, pkgPath: pkg.path }
|
|
/* istanbul ignore else */
|
|
if (extType === 'c') return { esm: false, type, extType, path, pkgPath: pkg.path }
|
|
// unreachable
|
|
}
|
|
default: throw Object.assign(Error(`package.json type "${type}" not recognized`), { meta: { type, extType, path, pkgPath: pkg.path } })
|
|
}
|
|
}
|
|
|
|
isFileEsm.constants = {
|
|
ERR_PATH_MUST_BE_STRING,
|
|
ERR_PATH_MUST_BE_ABSOLUTE,
|
|
ERR_PATH_MUST_EXIST,
|
|
ERR_PATH_MUST_HAVE_VALID_EXT
|
|
}
|
|
|
|
module.exports = isFileEsm
|