feat(CLI): use the local install of mos when available

close #65

README.md

@@ -148,6 +148,8 @@ mos test --tap | tap-nyan
 
 ![](http://i.imgur.com/jet4ZAG.png?2)
 
+**NOTE:** the CLI will use your local install of mos when available, even when run globally.
+
 ## API Usage
 
 <!--@example('example.js')-->

lib/cli.js

@@ -6,6 +6,22 @@ process.on('unhandledRejection', function (reason, p) {
     reason)
 })
 
+const resolve = require('resolve')
+const cwd = process.cwd()
+
+let localCLI
+try {
+  localCLI = resolve.sync('mos/lib/cli', { basedir: cwd })
+} catch (err) {
+  localCLI = __filename
+}
+
+if (localCLI && localCLI !== __filename) {
+  console.log('Using local install of mos')
+  require(localCLI)
+  return // eslint-disable-line
+}
+
 const updateNotifier = require('update-notifier')
 const meow = require('meow')
 const processFiles = require('./process-files')
@@ -18,7 +34,6 @@ const path = require('path')
 const test = require('tape')
 const tapDiff = require('@zkochan/tap-diff')
 const readPkgUp = require('@zkochan/read-pkg-up')
-const resolve = require('resolve')
 const mos = require('.')
 const initCustomPlugins = require('./init-custom-plugins')
 
@@ -62,8 +77,6 @@ const highlightPath = chalk.bgBlack.yellow
 
 const isTest = ~['test', 't'].indexOf((cli.input[0] || '').toLowerCase())
 
-const cwd = process.cwd()
-
 readPkgUp({ cwd })
   .then(result => {
     const pkgPlugins = Object