Modify Extract Installer Example

Modify Extract Installer illustrates how to overwrite the component.createOperationsForArchive() function to be able to install a component to a modified path.
Configuring the Example Installer
The installer configuration file, config.xml, in the config directory specifies the text and default values used in the installer:
- The <Name>element specifies the application name that is added to the page name and introduction text.
- The <Version>element specifies the application version number.
- The <Title>element specifies the installer name displayed on the title bar.
- The <Publisher>element specifies the publisher of the software (as shown in the Windows Control Panel, for example).
- The <StartMenuDir>element specifies the name of the default program group for the product in the Windows Start menu.
- The <TargetDir>element specifies that the default target directory is located in theIfwExamplesdirectory in the home directory of the current user (because the predefined variable@HomeDir@is used as a part of the value). For more information, see Predefined Variables.
  <?xml version="1.0" encoding="UTF-8"?>
  <Installer>
      <Name>Modify Extract Installer Example</Name>
      <Version>1.0.0</Version>
      <Title>Modify Extract Installer Example</Title>
      <Publisher>Qt-Project</Publisher>
      <StartMenuDir>Qt IFW Examples</StartMenuDir>
      <TargetDir>@HomeDir@/IfwExamples/modifyextract</TargetDir>
  </Installer>
Creating the Example Package Information File
The installer package information file, package.xml, in the meta directory specifies the components that are available for installation:
- The <DisplayName>element specifies the human-readable name of the component.
- The <Description>element specifies the human-readable description of the component.
- The <Version>element specifies the version number of the component.
- The <ReleaseDate>element specifies the date when this component version was released.
- The <Default>element is set totrueto preselect the component in the installer.
- The <Script>element specifies the file name of the JavaScript file that is loaded to perform operations.
  <?xml version="1.0"?>
  <Package>
      <DisplayName>Modify extract operation</DisplayName>
      <Description>A component that uses a hook to modify the extract operation.</Description>
      <Version>1.0.1</Version>
      <ReleaseDate>2014-12-19</ReleaseDate>
      <Default>true</Default>
      <Script>installscript.js</Script>
  </Package>
Modifying Target Path
In installscript.js, we overwrite the default component.createOperationsForArchive() implementation to be able to register an Extract operation with a custom argument:
Component.prototype.createOperationsForArchive = function(archive) { component.addOperation("Extract", archive, "@TargetDir@/extractToAnotherPath"); }
Generating the Example Installer
To create the example installer, switch to the example source directory on the command line and enter the following command:
- On Windows:..\..\bin\binarycreator.exe -c config\config.xml -p packages installer.exe 
- On Linux or OS X:../../bin/binarycreator -c config/config.xml -p packages installer 
The installer is created in the current directory.
Files:
- modifyextract/config/config.xml
- modifyextract/packages/org.qtproject.ifw.example.modifyextract/data/my_content/test.txt
- modifyextract/packages/org.qtproject.ifw.example.modifyextract/meta/installscript.js
- modifyextract/packages/org.qtproject.ifw.example.modifyextract/meta/package.xml
- modifyextract/modifyextract.pro