开发自己的composer组件

要点：理解composer如何实现自动加载第三方组件; 理解psr-0和psr-4的规范; 理解基于psr-0,psr-4,classmap,files如何实现自动加载。 理解Composer和Packagist

创建目录名称

mkdir try-make-package
cd try-make-package

这个try-make-package文件夹就是你的包的根目录了，你只需要记住composer.json在包的哪个目录下面，一般那就是包的根目录了。 现在我们还没有composer.json文件，下面我们来初始化

初始化扩展包

☁  composer init

  Welcome to the Composer config generator

This command will guide you through creating your composer.json config.Package name (<vendor>/<name>) [lingan/try-make-package]:Description []: try make a package
Author [saboran <saboran@163.com>, n to skip]:Minimum Stability []: dev
Package Type (e.g. library, project, metapackage, composer-plugin) []: library
License []: MITDefine your dependencies.Would you like to define your dependencies (require) interactively [yes]? n
Would you like to define your dev dependencies (require-dev) interactively [yes]? n{
    "name": "lingan/try-make-package",
    "description": "try make a package",
    "type": "library",
    "license": "MIT",
    "authors": [
        {
            "name": "saboran",
            "email": "saboran@163.com"
        }
    ],
    "minimum-stability": "dev",
    "require": {}}Do you confirm generation [yes]? yes

经过一番上面的挣扎在当前目录就生成了composer.json文件，下面我们对这个文件进行一些修改

修改composer.json增加自动加载规范(命名空间和目录映射关系)和环境要求

{
  "name": "lingan/try-make-package",
  "description": "try make a package",
  "type": "library",
  "license": "MIT",
  "authors": [
    {
      "name": "saboran",
      "email": "saboran@163.com"
    }
  ],
  "minimum-stability": "dev",
  "require": {
    "php": ">=7.0"
  },
  "autoload": {
    "psr-4": {
      "Flower\\Rose\\": "src/Flower/Rose",
      "Flower\\Lily\\": "src/Flower/Lily"
    }
  }}

创建类文件

根据上面的命名空间和目录的映射关系，创建对应目录和文件，如下图

img

对应文件内容

<?php/**
 * Created by PhpStorm.
 * User: Lingan
 * Date: 2017/11/6
 * Time: 21:39
 */namespace Flower\Rose;class Rose{
    public function desc()
    {
        echo "this is rose flower";
    }}
<?php/**
 * Created by PhpStorm.
 * User: Lingan
 * Date: 2017/11/6
 * Time: 21:38
 */namespace Flower\Lily;class Lily{
    public function desc()
    {
        echo "this is lily flower";
    }}

测试安装

以上代码都梳理完毕后，需要composer install来测试我们的包是否可以正常工作此时会在vendor/composer/autoload_psr4.php中生成命名空间和目录的映射关系，被包在一个数组中：

<?php// autoload_psr4.php @generated by Composer$vendorDir = dirname(dirname(__FILE__));$baseDir = dirname($vendorDir);return array(
    'Flower\\Rose\\' => array($baseDir . '/src/Flower/Rose'),
    'Flower\\Lily\\' => array($baseDir . '/src/Flower/Lily'),);

增加.gitignore为git忽略一些文件,增加readme.md为项目增加描述

.idea
vendor/composer.lock

提交代码到github

现在自己的Github主页上创建一个新的仓库然后将项目提交到对应仓库，参考如下

git init
git add -Agit commit -am "init && dev package"git remote add origin git@github.com:linganmin/try-make-package.git
git push -u origin master

img

登录自己的packagist submit(自己注册)

将自己的项目地址粘贴

img

点击check，然后点击submit，至此，自己的composer包就提交成功了，

img

测试使用自己开发的包扩展[2017.11.07更新]

  • 创建测试目录

    mkdir test-my-package
cd test-my-package

  • 安装自己的扩展

    composer require lingan/try-make-package dev-master./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)Package operations: 1 install, 0 updates, 0 removals- Installing lingan/try-make-package (dev-master d7b9f94): Cloning d7b9f941b0 from cache
Writing lock file
Generating autoload files

  • 安装完成的目录如下图

    img

  • 查看autoload_psr4.php

<?php// autoload_psr4.php @generated by Composer$vendorDir = dirname(dirname(__FILE__));$baseDir = dirname($vendorDir);return array(
    'Flower\\Rose\\' => array($vendorDir . '/lingan/try-make-package/src/Flower/Rose'),
    'Flower\\Lily\\' => array($vendorDir . '/lingan/try-make-package/src/Flower/Lily'),);
  • 新建首页入口文件index.php，开始测试自己写的包
<?php/**
 * Created by PhpStorm.
 * User: Lingan
 * Date: 2017/11/7
 * Time: 11:04
 */require_once './vendor/autoload.php'; // 加载自动加载文件use Flower\Rose\Rose;use Flower\Lily\Lily;$rose = new Rose();$lily = new Lily();echo $rose->desc();echo "\n";echo $lily->desc();
  • 执行
php index.php
this is rose flower
this is lily flower%

*** 至此说明我们自己开发的扩展包可以正常使用

设置Packagist上自动更新扩展包，即当我们更新扩展包提交到GitHub时，Packagist自动更新

在没有设置自动更新时，Packagist上包详情页会有这样一个提示

This package is not auto-updated. Please set up the GitHub Service Hook for Packagist so that it gets updated whenever you push!(这个软件包不是自动更新的。请为Packagist 设置GitHub服务钩，以便在您推送时更新！)

详细设置自动更新软件包的文档地址

简化步骤如下：

  1. 去个人中心页面拿到自己的api令牌
  2. 去当前包在GitHub的地址，点击设置，点击集成和服务，点击添加Packagist服务并配置你的API令牌，以及你的Packagist用户名和账号对应域名
  3. 选择active，点击add service
  4. 设置自动更新结束，之后你更改了自己包扩展的代码提交到GitHub后，很短的时间差就会同步到Packagist

img