feat(debug): add debug with DEBUG=ok-file variable

README.md

@@ -26,6 +26,10 @@ Check if given file `foo.txt` exists and is not empty
 $(npm bin)/ok-file foo.txt
 ```
 
+## Debugging
+
+Run program with `DEBUG=ok-file ...` environment variable
+
 ### Small print
 
 Author: Gleb Bahmutov <gleb.bahmutov@gmail.com> © 2017

package.json

@@ -84,5 +84,9 @@
     "prettier-standard": "7.0.1",
     "semantic-release": "^8.0.3",
     "standard": "10.0.3"
+  },
+  "dependencies": {
+    "debug": "3.1.0",
+    "globby": "6.1.0"
   }
 }

src/index.js

@@ -1,8 +1,29 @@
 'use strict'
 
+const debug = require('debug')('ok-file')
 const fs = require('fs')
 
+function isWildcard (s) {
+  return s.indexOf('*') !== -1
+}
+
+function okWildcard (pattern) {
+  const globby = require('globby')
+  const filenames = globby.sync(pattern)
+  if (!filenames.length) {
+    console.error('Could not find any files matching "%s"', pattern)
+    return false
+  }
+  return true
+}
+
 function okFile (filename) {
+  if (isWildcard(filename)) {
+    debug('checking wild card "%s"', filename)
+    return okWildcard(filename)
+  }
+
+  debug('checking individual file %s', filename)
   if (!fs.existsSync(filename)) {
     console.error('Cannot find file', filename)
     return false