Add update command / option

README.md

@@ -25,6 +25,7 @@ accepts `opts` as below, returns `ngo` function which executes Go commands
   - **env** *(Object, environment vars to set for the Go command - optional)*
   - **goRoot** *(String, Go root path (ex. `/usr/local/go`) - optional)*
   - **goPath** *(String, Go workspace path (ex. `~/work`) - optional)*
+  - **update** *(Boolean, Update local install to latest - optional)*
 
 ### ngo(arguments, options)
 returns promise which resolves to [`execa`](https://github.com/sindresorhus/execa) styled object
@@ -39,6 +40,10 @@ returns promise which resolves to [`execa`](https://github.com/sindresorhus/exec
 ```sh
 $ ngo version
 # go version go1.8.3 windows/amd64
+
+# to update the `ngo` install of Go (won't update system version)
+$ ngo-update
+# go version go1.9.4 windows/amd64
 ```
 
 #### programmatic usage

cli-update.js

@@ -0,0 +1,5 @@
+#! /usr/bin/env node
+'use strict'
+
+const ngo = require('./index.js')({update: true})
+ngo().then((r) => console.log(r.stdout || r.stdout)).catch(console.error)

cli.js

@@ -1,9 +1,7 @@
 #! /usr/bin/env node
 'use strict'
 
-// Setup
 const ngo = require('./index.js')()
 const args = process.argv.slice(2)
 
-// Main
 ngo(args).then((r) => console.log(r.stdout || r.stdout)).catch(console.error)

index.js

@@ -19,11 +19,15 @@ module.exports = (opts = {}) => {
   env.GOARCH = goArch = goArch || env.GOARCH || arch
   env.ngoBin = path.join(goRoot, 'bin', 'go')
   try { env.hasBin = exists(path.join(goRoot, 'bin')) } catch (ex) {}
-  return (args, cmdOpts = {}) => runner(args, Object.assign({}, cmdOpts, {env}))
+  if (opts.update) delete env.hasBin
+  return (args, cmdOpts = {}) => {
+    if (opts.update) args = args || ['version']
+    return runner(args, Object.assign({}, cmdOpts, {env}))
+  }
 }
 
 function runner (args, opts) {
-  if (!args) return Promise.reject(new Error(`No GO command specified`))
+  if (!args) return Promise.reject(new Error(`No Go command specified`))
   args = Array.isArray(args) ? args : [args]
   let env = opts.env
   if (env.hasBin) return execa(env.ngoBin, args, opts)

package.json

@@ -1,17 +1,19 @@
 {
   "name": "ngo",
-  "version": "2.1.1",
+  "version": "2.2.0",
   "description": "Run Go commands, whether your Go env is in place or not",
   "main": "index.js",
   "files": [
     "index.js",
-    "cli.js"
+    "cli.js",
+    "vendor/gopath"
   ],
   "scripts": {
     "test": "ava --verbose"
   },
   "bin": {
-    "ngo": "cli.js"
+    "ngo": "cli.js",
+    "ngo-update": "cli-update.js"
   },
   "repository": {
     "type": "git",