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### 自定义安装程序类
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### 自定义安装程序类
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这个类用于执行自定义的安装过程,它必须实现 [`Composer\Installer\InstallerInterface`][4] 这个接口(或者继承了另一个实现此接口的安装程序类)。It defines the [type][1] string as it will be recognized by packages that will use this installer in the `supports()` method.
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这个类用于执行自定义的安装过程,它必须实现 [`Composer\Installer\InstallerInterface`][4] 这个接口(或者继承了另一个实现此接口的安装程序类)。它将会对 [安装类型][1] 中定义的字符串执行 `supports()` 方法验证,一旦通过就采用对应的安装程序。
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> **注意:** _请慎重选择你的 [安装类型][1] 名称,建议遵循这样的格式:`vendor-type`_。例如:`phpdocumentor-template`。
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> **注意:** _请慎重选择你的 [安装类型][1] 名称,建议遵循这样的格式:`vendor-type`_。例如:`phpdocumentor-template`。
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InstallerInterface 类定义了以下方法(请查阅源码以获得更详细的信息):
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InstallerInterface 类定义了以下方法(请查阅源码以获得更详细的信息):
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* **supports()**, here you test whether the passed [type][1] matches the name
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* **supports()** 在这里测试你发布的这个安装程序名称是否通过 [安装类型][1] 匹配(参见示例)。只有正确匹配的资源包才会使用此安装程序进行安装。
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that you declared for this installer (see the example).
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* **isInstalled()** 确定支持的资源包是否已安装。
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* **isInstalled()**, determines whether a supported package is installed or not.
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* **install()** 这里你可以定义在安装时需要执行的动作。
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* **install()**, here you can determine the actions that need to be executed
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upon installation.
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* **update()**, here you define the behavior that is required when Composer is
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* **update()**, here you define the behavior that is required when Composer is
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invoked with the update argument.
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invoked with the update argument.
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* **uninstall()**, here you can determine the actions that need to be executed
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* **uninstall()** 这里你可以定义在移除一个包时需要执行的动作。
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when the package needs to be removed.
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* **getInstallPath()** 这个方法需要返回一个资源包将要安装的位置。_相对于 composer.json 文件的位置。_
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* **getInstallPath()**, this method should return the location where the
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package is to be installed, _relative from the location of composer.json._
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例:
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例:
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