dpkg：如何使用触发器？ [英] dpkg: How to use trigger?

问题描述

我已经写了一个小的cdn服务器，如果新的东西（pool-content-packages）安装到池中，那么它将重建他的池注册表。

pool-content-package调用cdn-server的init.d，我想使用触发器。在安装完所有软件包之后，它将重新启动服务器一次安装运行结束。

我需要做什么才能使用debhelper支持在我的软件包中使用触发器？

解决方案

您要查找的是dpkg-triggers。

使用debhelper构建debian包的一个解决方案是：

步骤1）

创建文件 debian /< serverPackageName> .triggers （replace < serverPackageName>

步骤1a）

定义一个触发器来监视你的池的目录。文件的内容是：

interest / path / to / my / pool

步骤1b）

但是你也可以定义一个命名触发器，参见步骤3）。

文件内容：

兴趣cdn-pool-changed

触发器的名称cdn-pool-changed 是免费的。

步骤2）

添加处理程序用于触发文件 debian /< serverPackageName> .postinst （替换 < serverPackageName>

示例：

  ＃！/ bin / sh 
 
 set -e 
 
 
配置中的$ 1
 ;; 
 
触发）
＃这里是处理程序
 /etc/init.d/<serverPackageName>重启
 ;; 
 
 abort-upgrade | abort-remove | abort-deconfigure）
 ;; 
 
 *）
 echopostinst调用未知参数\` $ 1'>& 2 
 exit 1 
 ;; 
 esac 
 
＃DEBHELPER＃
 
退出0 
  

将 < serverPackageName> 替换为服务器软件包的名称。

步骤3）（仅适用于命名触发器，步骤1b））

在每个内容包中添加文件 debian /< contentPackageName> .triggers （替换 < contentPackageName> ，内容包名称） / p>

文件内容：

激活cdn-pool-changed

在步骤1中定义的触发器使用相同的名称。

更多详细信息

我可以找到dpkg-triggers的最佳描述是如何使用dpkg触发器。相应的git存储库，您可以在这里获取示例：

git clone git：//anonscm.debian.org/users/seanius/dpkg- triggers-example.git

I have written a little cdn server that shall rebuild his pool registry if new stuff (pool-content-packages) is installed into the pool.

Instead that every pool-content-package call the init.d of the cdn-server, I'd like to use triggers. Than it would restarted the server only one time at end of an installation run after all packages are installed.

What have I to do to use trigger in my packages with debhelper support?

解决方案

What you are looking for is dpkg-triggers.

One solution with use of debhelper to build the debian packages is this:

Step 1)

Create file debian/<serverPackageName>.triggers (replace <serverPackageName> with name of your server package).

Step 1a)

Define a trigger that watch the directory of your pool. The content of file would be:

interest /path/to/my/pool

Step 1b)

But you can also define a named trigger, which have to be fired explicit (see step 3).

content of file:

interest cdn-pool-changed

The name of the trigger cdn-pool-changed is free. You can take what ever you want.

Step 2)

Add handler for trigger to file debian/<serverPackageName>.postinst (replace <serverPackageName> with name of your server package).

Example:

#!/bin/sh

set -e

case "$1" in
    configure)
    ;;

    triggered)
        #here is the handler 
        /etc/init.d/<serverPackageName> restart
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

#DEBHELPER#

exit 0

Replace <serverPackageName> with name of your server package.

Step 3) (only for named triggers, step 1b) )

Add in every content package the file debian/<contentPackageName>.triggers (replace <contentPackageName> with names of your content packages).

content of file:

activate cdn-pool-changed

Use same name for trigger you defined in step 1.

More detailed Information

The best description for dpkg-triggers I could found is "How to use dpkg triggers". The corresponding git repository with examples you can get here:

git clone git://anonscm.debian.org/users/seanius/dpkg-triggers-example.git

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