feat: add CLI command

fix #27

Author: jedwards1211

README.md

@@ -13,10 +13,11 @@ but written from scratch to guarantee the same behavior and tidy code as best as
 ## Usage
 
 ```
-git clone https://github.com/codemodsquad/asyncify
-npx jscodeshift -t asyncify/index.js path/to/your/project/**/*.js
+npx @codemodsquad/asyncify path/to/your/project/**/*.js
 ```
 
+This command just forwards to `jscodeshift`, you can pass other `jscodeshift` CLI options.
+
 ## Support table
 
 |                                                                    | `asyncify` |

bin/index.js

@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+
+const child = require('child_process').spawn(
+  'jscodeshift',
+  ['-t', require.resolve('..'), ...process.argv.slice(2)],
+  { stdio: 'inherit' }
+)
+
+child.on('error', error => {
+  // eslint-disable-next-line no-console
+  console.error(error.stack)
+  process.exit(1)
+})
+child.on('close', (code, signal) => {
+  if (code != 0) {
+    process.exit(code)
+  }
+  if (signal) {
+    process.exit(1)
+  }
+  process.exit(0)
+})

package.json

@@ -3,6 +3,7 @@
   "version": "0.0.0-development",
   "description": "transforms promise chains into async/await",
   "sideEffects": false,
+  "bin": "./bin/index.js",
   "scripts": {
     "lint": "eslint $npm_package_config_lint",
     "lint:fix": "eslint $npm_package_config_lint",