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/*!
    \example repositorycategories
    \ingroup qtifwexamples
    \title Repository Categories Example

    \brief Using the RepositoryCategories element to set up an
    online installer where repositories are grouped.

    \image qtifw-examples-repository-categories.png

    \e{Repository Categories} illustrates how to set up an installer
    where repositories are grouped into categories.

    \include installerfw-examples-configuring.qdocinc

    \list
        \li The \c <RepositoryCategories> element shows how to group repositories into categories.
            \c <RepositoryCategories> can contain one or several \c <RemoteRepositories>
            child elements that specify a connection to repositories. For more
            information about \c <RemoteRepositories> see
            \l{Configuring Repositories}.
    \endlist

    \quotefile repositorycategories/config/config.xml

    \include installerfw-examples-packaging.qdocinc

    \list
        \li The \c <Default> element is set to \c true to preselect the
            component in the installer.
    \endlist

    \quotefile online/packages/A/meta/package.xml

    \section1 Generating the Online Repository

    This installer contains four packages that each have two components. The \c Packages directory contains two components
    that are not grouped categories. They are always visible in tree view in the component selection page. \c Packages_forcategory1
    and \c packages2_forcategory1 both contain two components, which are visible when \c Category 1 is fetched. \c Packages_forcategory2
    contains two components that are visible only when \c Category 2 is fetched.

    The packages need to be converted to a file structure that the installer can
    fetch at runtime. To use the \c repogen tool to convert the packages, switch
    to the example source directory on the command line and enter the following
    command:

    \list
        \li On Windows:
            \code
            ..\..\bin\repogen.exe -p packages repository
            ..\..\bin\repogen.exe -p packages_forcategory1 repository1
            ..\..\bin\repogen.exe -p packages2_forcategory1 repository2
            ..\..\bin\repogen.exe -p packages_forcategory2 repository3
            \endcode
        \li On Linux or macOS:
            \code
            ../../bin/repogen -p packages repository
            ../../bin/repogen -p packages_forcategory1 repository1
            ../../bin/repogen -p packages2_forcategory1 repository2
            ../../bin/repogen -p packages_forcategory2 repository3
            \endcode
    \endlist

    The generated \c repository, \c repository1, \c repository2 and \c repository3 directories will now
    contain a full copy of the package data and some additionally generated metadata, such as SHA
    checksums.

    The directories now need to be made available at the URL set in
    \c config.xml: \c{http://localhost/repository}, \c{http://localhost/repository1}, \c{http://localhost/repository2} and
    \c{http://localhost/repository3}. How this is done depends on
    the platform and web server used. If you do not have a running web server
    yet, but have Python available, you should be able to start a minimal web
    server from the command line. Make sure you are in the example directory,
    and then enter:

    \code
        python -m SimpleHTTPServer 80
    \endcode

    You should now be able to open and explore \l{http://localhost/repository}
    in your web browser.

    \note If you do not have enough permissions to set up a web server locally,
    you can also specify an absolute \c{file:///} URL as the value of the \c URL
    element in \c config.xml. For example,
    \c file:///C:/Qt/QtIFW/examples/repositorycategories/repository would be a valid URL on
    Windows if \c repository is located in \c C:\Qt\QtIFW\examples\repositorycategories.

   \include installerfw-examples-generating-online.qdocinc
*/
