Packages that can be installed via the administration interface may include specific custom install and uninstall scripts. A custom script can be called at any stage during the package installation/uninstallation process. These scripts can be interactive and are capable of displaying extra wizard steps. Interactive scripts are based on a "wizard step" mechanism provided by the class "eZPackageInstallationHandler".

The following example demonstrates how to implement a custom install script for a package.

Example

Let's say that you need to add some additional post-install step(s) to a content object package called "Products" which is located under the "ez_systems" internal repository (in the "var/storage/packages/ez_systems/products" directory). To implement a post-install interactive script for this package, do the following:

1.  Create the following new sub-directories in the package directory: 
    

   • post-install

   • post-install/templates
2. Open the "package.xml" file located in the package directory and edit it. Find the list of items to install which is specified between the <install> and </install> XML tags and add the following item in the end of this list:

   <item type="ezinstallscript"
         filename="myinstallscript"
         sub-directory="post-install" />
   

3. Create a file called "myinstallscript.xml" in the "post-install" directory (this file must contain a description of your install script) and add the following lines to it:

   <?xml version="1.0" encoding="UTF-8"?>
   <install-script filename="myinstallscript.php"
                   classname="myInstallScript"
                   description="This is my custom install step" />
   

   This will tell the system that additional install step(s) is implemented in a PHP class called "myInstallScript" located in the "post-install/myinstallscript.php" file. The text description of the install script will be displayed in the beginning of the package installation process (as shown in the following screenshot).
    

   

   Displaying a custom install script in the list of items during the package installation process

4. Create a file called "myownstep.tpl" in the "post-install/templates" directory (this file will contain a template for the additional install step implemented by your install script) and add the following lines to it:

   <form method="post" action={'package/install'|ezurl}>
    
       {include uri="design:package/install/error.tpl"}
       {include uri="design:package/install_header.tpl"}
    
       <p>This is my custom step</p>
    
       <label>You may even click the checkbox if you want</label>
    
       <div class="block">
         <input class="button" type="checkbox" name="MyCheckBox" />
       </div>
    
       {include uri="design:package/navigator.tpl"}
    
   </form>
   

   The last step of the package installation will be displayed according to this template (look at the next screenshot).
    

   

   Displaying a custom wizard step during the package installation process

5.  Create a new file called "myinstallscript.php" in the "post-install" directory. This file must contain a PHP class called "myInstallScript" where all the steps are implemented (according to the description given in the "post-install/myinstallscript.xml" file). Add the following lines to the "myinstallscript.php" file:

   <?php
   class myInstallScript extends eZInstallScriptPackageInstaller
   {
     function myInstallScript( &$package, $type, $installItem )
       {
           eZDebug::writeDebug( $installItem, "Hello from myInstallScript" );
    
           $steps = array();
           $steps[] = array(
             'id' => 'my_own_step',
             'name' => 'My own step',
             'methods' => array( 'initialize' => 'initializeMyOwnStep',
                  'validate' => 'validateMyOwnStep',
                  'commit' => 'commitMyOwnStep' ),
             'template' => 'myownstep.tpl' );
           $this->eZPackageInstallationHandler( $package,
                                                $type,
                                                $installItem,
                                                'My own custom step',
                                                $steps );
       }
    
     // Function that is called before the step is displayed.
     // You can use it to set variables for your template.
    
     function initializeMyOwnStep( &$package, &$http, $step, &$persistentData, &$tpl, &$module )
       {
           eZDebug::writeDebug( "Hello from initializeMyOwnStep()" );
           return true;
       }
    
     // This function is called after user has submitted the form.
     // If this function returns "false", the step will be
     // displayed again.
    
     function validateMyOwnStep( &$package, &$http, $currentStepID, &$stepMap, &$persistentData, &$errorList )
       {
           eZDebug::writeDebug( "Hello from validateMyOwnStep()" );
           return true;
       }
    
     // This function is called after the form is submitted
     // and validated.
    
     function commitMyOwnStep( &$package, &$http, $step, &$persistentData, &$tpl )
       {
           eZDebug::writeDebug( "Hello from commitMyOwnStep()" );
           return true;
       }
   }
   ?>