feat(debug): added debug mode

Author: bahmutov

README.md

@@ -74,6 +74,13 @@ If there are multiple scripts, they will be printed to the console and an error
 * Most commands require typing only 3 characters - 2 for the tool itself "nr" and 1 character for the
 the script label
 
+## Debug
+
+If something is not working as expected, you can see the verbose debug messages
+by running
+
+    DEBUG=quick nr ...
+
 ### Small print
 
 Author: Gleb Bahmutov © 2015

bin/npm-quick-run.js

@@ -2,6 +2,7 @@
 
 'use strict'
 
+var debug = require('debug')('quick')
 var quickRun = require('..')
 
 var help = [
@@ -21,5 +22,6 @@ require('simple-bin-help')({
   }
 })
 
+debug('arguments %d', process.argv.length, process.argv)
 var prefix = process.argv[2]
 quickRun(prefix)

package.json

@@ -36,6 +36,7 @@
   },
   "homepage": "https://github.com/bahmutov/npm-quick-run#readme",
   "dependencies": {
+    "debug": "2.2.0",
     "findup": "0.1.5",
     "json-package": "1.1.2",
     "npm-utils": "1.5.0",

src/quick-run.js

@@ -1,3 +1,4 @@
+const debug = require('debug')('quick')
 const findScripts = require('json-package').find
 const runNpmCommand = require('npm-utils').test
 const join = require('path').join
@@ -80,6 +81,7 @@ function runPrefix (prefix) {
   if (extraArguments.length) {
     cmd += ' -- ' + extraArguments.join(' ')
   }
+  debug('formed command "%s"', cmd)
 
   runNpmCommand(cmd, npmErrorLoggers)
     .catch(function (result) {