在团队开发中，无论是写前端（js,css,html） ，还是后端 ，我们需要解决一个问题：如何统一团队代码风格。 这篇文章主要是使用pre-git , eslint , js-beautify 实现代码风格控制。

下面分别介绍这三个工具和使用方式：

pre-git
该工具能实现git hook的功能，在git的流程中插入一些自定义行为，例如commit之前执行代码检测，如果不通过则报错。

eslint
代码格式审核工具，可以随意组合配置各种风格，用于组成团队的代码统一规范。

js-beautiful
js代码整理、美化工具。

然后这三个工具互相配合就形成了以下效果：

项目组长定义好eslint的代码规范。

使用pre-git在commit之前运行eslint代码监测和js-beautiful代码美化

如果通过则自动"git add ." ，最后允许push。

一：npm安装上述工具

$npminstalleslintjs-beautifypre-git--save-dev

二：工具的配置

在根目录新建.eslintrc.json文件，并且把规范配置好，一下给一个精简版：

注意：如需更多检测，请到eslint官网查看

{"rules":{"comma-dangle":["error","never"],"arrow-body-style":["warn","always"],"no-const-assign":["error"]},"parserOptions":{"ecmaVersion":6}}

因测试，bash 中使用js-beautiful递归多层文件的时候总出现错误，所以由一脚本来进行代码美化：

beatufyjs.js

constfs=require('fs');constpath=require('path');constchild_process=require('child_process');for(letargofprocess.argv.splice(2)){letpathName=path.join(process.cwd(),arg);if(isFile(path.join(process.cwd(),arg))){child_process.exec(`./node_modules/js-beautify/js/bin/js-beautify.js-P-E-j-a${pathName}-r`,function(error,msg,stderr){console.log(msg.replace('\\\\n',''));});}else{read_dir(pathName);}}functionread_dir(dir){letfiles=fs.readdirSync(dir);for(letfileoffiles){letpathName=path.join(dir,file);if(isFile(pathName)){child_process.exec(`./node_modules/js-beautify/js/bin/js-beautify.js-P-E-j-a${pathName}-r`,function(error,msg,stderr){console.log(msg.replace('\\\\n',''));});}else{read_dir(pathName);}}}functionisFile(path){returnexists(path)&&fs.statSync(path).isFile();}functionexists(path){returnfs.existsSync(path)||path.existsSync(path);}

三：使用上述工具

在package.json文件中配置：

{"name":"demo","version":"1.0.0","description":"","main":"index.js","scripts":{"lint":"./node_modules/.bin/eslintroutesruntimeutilslibs--quiet","lint-fix":"./node_modules/.bin/eslintroutesruntimeutilslibs--quiet--fix","js-beautify":"node--harmony--use_strict./bin/beatufyjs.jslibsmiddlewaresindex.js"},"author":"kelvv","license":"ISC","config":{"pre-git":{"commit-msg":"","pre-commit":["npmrunlint-fix","npmrunjs-beautify","gitadd."],"pre-push":[],"post-commit":[],"post-checkout":[],"post-merge":[]}},"devDependencies":{"eslint":"^2.12.0","js-beautify":"^1.6.3","pre-git":"^3.9.1"}}

此时当你修改其中一个文件，然后"git add && git commit -m 'msg' "的时候，pre-commit中的三条命令就会执行，如果中途有错就会停止提交，修改完毕后再继续提交。

有一点需要注意的是，有的格式问题不足以报错的话，改方法会自动修改优化代码，并且自动添加修改，最后一步，执行：git push即可！

可以结合单元测试，更佳

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