fix line endings on Unix systems

.gitattributes

@@ -0,0 +1,5 @@
+# Set the default behavior, in case people don't have core.autocrlf set
+* text=auto
+
+# Require Unix line endings
+* text eol=lf

README.md

@@ -2,18 +2,25 @@
 
 [![Build Status](https://travis-ci.org/silentport/branch.svg?branch=master)](https://travis-ci.org/silentport/branch)
 <a href="https://www.npmjs.com/package/check-git-branch"><img alt="undefined" src="https://img.shields.io/npm/v/check-git-branch.svg?style=flat"></a>
-> Ensure that script commands in package. JSON are only allowed to execute on specified git branches
 
-### usage
->Maybe you should cooperate with cross-env
+Ensure that script commands in `package.json` are only allowed to execute on specified git branches
 
-`npm i check-git-branch -D`                           
-`npm i cross-env -D`
+### Installation
 
-### package.json in your project
+This module should be installed as one of your project's `devDependencies`:
+
+`npm install --save-dev check-git-branch`
+
+You might also want to consider using `cross-env`:
+
+`npm install --save-dev cross-env`
+
+### Usage
+
+example of the `scripts` section in your project's package.json:
 ```javascript
 "scripts": {
    "build": "branch master && cross-env NODE_ENV=production node build/build.js",
    "build-test": "branch dev && cross-env NODE_ENV=sandbox node build/build.js"
 },
-```
+```

bin/branch.js

@@ -1,49 +1,48 @@
 #!/usr/bin/env node
 
-const chalk = require ('chalk');
-const util = require ('util');
+const chalk = require('chalk');
+const util = require('util');
 const log = console.log;
 const error = chalk.bold.red;
 const warn = chalk.bold.yellow;
 const success = chalk.bold.green;
-const exec = util.promisify (require ('child_process').exec);
+const exec = util.promisify(require('child_process').exec);
 
 const groupStart = () => {
   console.group("---------------------------------------------------");
-}
+};
 const groupEnd = () => {
   console.groupEnd();
   log("---------------------------------------------------\n");
-}
+};
 
 const execCommand = async (cmd, b) => {
-  const ls = await exec (cmd);
-  const current = ls.stdout.trim ();
- 
+  const ls = await exec(cmd);
+  const current = ls.stdout.trim();
+
   groupStart();
 
-  log (chalk.green ('Current Branch: ') + `${current}\n`);
+  log(chalk.green('Current Branch: ') + `${current}\n`);
   if (!b) {
-    log(warn('Warning: ') 
-    + 
-    `Maybe you should assign a specific branch for current 
+    log(warn('Warning: ')
+      +
+      `Maybe you should assign a specific branch for current 
          script, such as use ${chalk.green('branch master && node xxx')} in scripts 
-         of your package.json `);
+         of your package.json`);
     groupEnd();
-    return ;
+    return;
   }
   if (current !== b) {
-    log (
-      error (`Error: `) +
-        `The script you try to execute is only available in
-       ${chalk.green(b)} branch, but current branch is ${chalk.blue(current)}`
+    log(error('Error: ')
+      +
+      `The script you try to execute is only available in
+        ${chalk.green(b)} branch, but current branch is ${chalk.blue(current)}`
     );
     groupEnd();
-    process.exitCode = 1;
-    process.exit ();
+    process.exit(1);
   }
-  log(success("Success: ") + 'you passed the branch check  √')
+  log(success('Success: ') + 'you passed the branch check  √');
   groupEnd();
 
 };
-execCommand ('git symbolic-ref --short -q HEAD', process.argv[2]);
+execCommand('git symbolic-ref --short -q HEAD', process.argv[2]);

package.json

@@ -4,7 +4,7 @@
   "description": "check git current branch",
   "main": "./branch.js",
   "scripts": {
-    "test": "node branch.js  master"
+    "test": "node branch.js master"
   },
   "bin": {
     "branch": "./bin/branch.js"