feat: use 'module.parent.filename' when possible, do not fail in esm

Author: gabrielcsapo

Diff for: CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.4.1 (03/13/2022)
+
+- use `module.parent.filename` when possible, do not fail in esm
+
 # 0.4.0 (3/31/2019)
 
 - adds list option that will allow you to define a list type

Diff for: index.js

@@ -20,8 +20,6 @@ const { dedent, flatten } = require('./util')
 function Woof (helpMessage, options = {}) {
   delete require.cache[__filename]
 
-  const parentDir = path.dirname(module.parent.filename)
-
   const program = {}
   const { version, defaultCommand, args = process.argv.slice(2), flags = {}, commands = {} } = options
 
@@ -69,6 +67,8 @@ function Woof (helpMessage, options = {}) {
       } else {
         // try to get the version from the current applications package.json
         try {
+          const parentDir = path.dirname(module.parent.filename);
+
           process.stdout.write(`v${require(`${parentDir}/package.json`).version}\n`)
         } catch (ex) {
           process.stdout.write('v?\n')

Diff for: package.json

@@ -1,6 +1,6 @@
 {
   "name": "woof",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "🐶 command line applications made as easy as fetch",
   "main": "index.js",
   "scripts": {