flatpak/doc/flatpak.xml

<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
    "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">

<refentry id="flatpak">

    <refentryinfo>
        <title>flatpak</title>
        <productname>flatpak</productname>

        <authorgroup>
            <author>
                <contrib>Developer</contrib>
                <firstname>Alexander</firstname>
                <surname>Larsson</surname>
                <email>alexl@redhat.com</email>
            </author>
        </authorgroup>
    </refentryinfo>

    <refmeta>
        <refentrytitle>flatpak</refentrytitle>
        <manvolnum>1</manvolnum>
    </refmeta>

    <refnamediv>
        <refname>flatpak</refname>
        <refpurpose>Build, install and run applications and runtimes</refpurpose>
    </refnamediv>

    <refsynopsisdiv>
            <cmdsynopsis>
                <command>flatpak</command>
                <arg choice="opt" rep="repeat">OPTION</arg>
                <arg choice="req">COMMAND</arg>
            </cmdsynopsis>
    </refsynopsisdiv>

    <refsect1>
        <title>Description</title>

        <para>
            Flatpak is a tool for managing applications and the runtimes
            they use. In the Flatpak model, applications can be built and
            distributed independently from the host system they are used
            on, and they are isolated from the host system ('sandboxed')
            to some degree, at runtime.
        </para>

        <para>
            Flatpak can operate in system-wide or per-user mode. The system-wide
            data (runtimes, applications and configuration) is located in
            <filename>$prefix/var/lib/flatpak/</filename>, and the per-user
            data is in <filename>$HOME/.local/share/flatpak/</filename>.
            Below these locations, there is a local repository in the
            <filename>repo/</filename> subdirectory and installed runtimes
            and applications are in the corresponding <filename>runtime/</filename>
            and <filename>app/</filename> subdirectories.
        </para>

       <para>
            System-wide remotes can be statically preconfigured by dropping
            <citerefentry><refentrytitle>flatpakrepo</refentrytitle><manvolnum>5</manvolnum></citerefentry>
            files into <filename>/usr/share/flatpak/remotes.d/</filename> and
            <filename>/etc/flatpak/remotes.d/</filename>. If a file with
            the same name exists in both, the file under
            <filename>/etc</filename> will take precedence.
       </para>

        <para>
            In addition to the system-wide installation in <filename>$prefix/var/lib/flatpak/</filename>,
            which is always considered the default one unless overridden, more
            system-wide installations can be defined via configuration files in
            <filename>/etc/flatpak/installations.d/</filename>, which must define
            at least the id of the installation and the absolute path to it.
            Other optional parameters like <arg choice="plain">DisplayName</arg>,
            <arg choice="plain">Priority</arg> or <arg choice="plain">StorageType</arg>
            are also supported.
        </para>

        <para>
            Flatpak uses OSTree to distribute and deploy data. The repositories
            it uses are OSTree repositories and can be manipulated with the
            <command>ostree</command> utility. Installed runtimes and
            applications are OSTree checkouts.
        </para>

        <para>
            Basic commands for building flatpaks such as build-init, build and build-finish
            are included in the flatpak utility. For higher-level build support, see
            the separate 
            <citerefentry><refentrytitle>flatpak-builder</refentrytitle><manvolnum>1</manvolnum></citerefentry> tool.
        </para>

        <para>
            Flatpak supports installing from sideload repos. These are partial
            copies of a repository (generated by <command>flatpak create-usb</command>) that are used as
            an installation source when offline (and online as a performance improvement).
            Such repositories are configured by creating symlinks to the sideload sources
            in the <filename>sideload-repos</filename>  subdirectory of the installation directory (i.e. typically
            <filename>/var/lib/flatpak/sideload-repos</filename> or
            <filename>~/.local/share/flatpak/sideload-repos</filename>). Additionally
            symlinks can be created in <filename>/run/flatpak/sideload-repos</filename>
            which is a better location for non-persistent sources (as it is cleared on reboot). These symlinks
            can point to either the directory given to <command>flatpak create-usb</command> which by default
            writes to the subpath <filename>.ostree/repo</filename>, or directly to an ostree repo.
        </para>

    </refsect1>

    <refsect1>
        <title>Options</title>

        <para>
            The following global options are understood. Individual commands have their
            own options.
        </para>

        <variablelist>
            <varlistentry>
                <term><option>-h</option></term>
                <term><option>--help</option></term>

                <listitem><para>
                    Show help options and exit.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>-v</option></term>
                <term><option>--verbose</option></term>

                <listitem><para>
                    Show debug information during command processing. Use -vv for more detail.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--ostree-verbose</option></term>

                <listitem><para>
                    Show OSTree debug information during command processing.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--version</option></term>

                <listitem><para>
                    Print version information and exit.
                </para></listitem>
            </varlistentry>

           <varlistentry>
                <term><option>--default-arch</option></term>

                <listitem><para>
                    Print the default arch and exit.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--supported-arches</option></term>

                <listitem><para>
                    Print the supported arches in priority order and exit.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--gl-drivers</option></term>

                <listitem><para>
                    Print the list of active gl drivers and exit.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--installations</option></term>

                <listitem><para>
                    Print paths of system installations and exit.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--print-system-only</option></term>

                <listitem><para>
                    When the <command>flatpak --print-updated-env</command>
                    command is run, only print the environment for system
                    flatpak installations, not including the user’s home
                    installation.
                </para></listitem>
            </varlistentry>

            <varlistentry>
                <term><option>--print-updated-env</option></term>

                <listitem><para>
                    Print the set of environment variables needed to use
                    flatpaks, amending the current set of environment variables.
                    This is intended to be used in a systemd environment
                    generator, and should not need to be run manually.
                </para></listitem>
            </varlistentry>

        </variablelist>
    </refsect1>

    <refsect1>
        <title>Commands</title>

        <para>Commands for managing installed applications and runtimes:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-install</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Install an application or a runtime from a remote or bundle.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-update</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Update an installed application or runtime.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-uninstall</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Uninstall an installed application or runtime.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-mask</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Mask out updates and automatic installation.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-pin</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Pin runtimes to prevent automatic removal.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-list</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    List installed applications and/or runtimes.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-info</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Show information for an installed application or runtime.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-history</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Show history.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-config</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Manage flatpak configuration.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-repair</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Repair flatpak installation.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-create-usb</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Copy apps and/or runtimes onto removable media.
                </para></listitem>
            </varlistentry>
        </variablelist>


        <para>Commands for finding applications and runtimes:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-search</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Search for applications and runtimes.
                </para></listitem>
            </varlistentry>
        </variablelist>


        <para>Commands for managing running applications:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-run</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Run an application.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-kill</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Stop a running application.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-override</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Override permissions for an application.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-make-current</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Specify the default version to run.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-enter</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Enter the namespace of a running application.
                </para></listitem>
            </varlistentry>
        </variablelist>

        <para>Commands for managing file access:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-document-export</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Grant an application access to a specific file.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-document-unexport</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Revoke access to a specific file.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-document-info</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Show information about a specific file.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-documents</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    List exported files.
                </para></listitem>
            </varlistentry>
        </variablelist>

        <para>Commands for managing the dynamic permission store:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-permission-remove</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Remove item from permission store.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-permissions</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    List permissions.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-permission-show</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Show app permissions.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-permission-reset</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Reset app permissions.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-permission-set</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Set app permissions.
                </para></listitem>
            </varlistentry>
        </variablelist>

        <para>Commands for managing remote repositories:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remotes</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    List all configured remote repositories.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remote-add</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Add a new remote repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remote-modify</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Modify properties of a configured remote repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remote-delete</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Delete a configured remote repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remote-ls</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    List contents of a configured remote repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remote-info</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Show information about a ref in a configured remote repository.
                </para></listitem>
            </varlistentry>
        </variablelist>

        <para>Commands for building applications:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-init</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Initialize a build directory.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Run a build command in a build directory.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-finish</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Finalizes a build directory for export.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-export</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Export a build directory to a repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-bundle</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Create a bundle file from a ref in a local repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-import-bundle</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Import a file bundle into a local repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-sign</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Sign an application or runtime after its been exported.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-update-repo</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Update the summary file in a repository.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-build-commit-from</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Create a new commit based on an existing ref.
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-repo</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Print information about a repo.
                </para></listitem>
            </varlistentry>
        </variablelist>

        <para>Commands available inside the sandbox:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-spawn</refentrytitle><manvolnum>1</manvolnum></citerefentry></term>

                <listitem><para>
                    Run a command in another sandbox.
                </para></listitem>
            </varlistentry>
        </variablelist>

    </refsect1>

    <refsect1>
        <title>File formats</title>

        <para>File formats that are used by Flatpak commands:</para>

        <variablelist>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpakref</refentrytitle><manvolnum>5</manvolnum></citerefentry></term>

                <listitem><para>
                    Reference to a remote for an application or runtime
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpakrepo</refentrytitle><manvolnum>5</manvolnum></citerefentry></term>

                <listitem><para>
                    Reference to a remote
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-remote</refentrytitle><manvolnum>5</manvolnum></citerefentry></term>

                <listitem><para>
                    Configuration for a remote 
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-installation</refentrytitle><manvolnum>5</manvolnum></citerefentry></term>

                <listitem><para>
                    Configuration for an installation location
                </para></listitem>
            </varlistentry>
            <varlistentry>
                <term><citerefentry><refentrytitle>flatpak-metadata</refentrytitle><manvolnum>5</manvolnum></citerefentry></term>

                <listitem><para>
                    Information about an application or runtime
                </para></listitem>
            </varlistentry>
        </variablelist>
    </refsect1>

    <refsect1>
        <title>Environment</title>
            <para>
              Besides standard environment variables such as <envar>XDG_DATA_DIRS</envar> and
              <envar>XDG_DATA_HOME</envar>, flatpak consults some of its own.
            </para>
            <variablelist>
                <!-- Please keep these in alphabetical order -->

                <!-- FLATPAK intentionally not documented:
                     it is intended for testing and development only
                     (it is the flatpak executable used by the
                     flatpak-portal) -->

                <varlistentry>
                    <term><envar>FLATPAK_BINARY</envar></term>
                    <listitem><para>
                        Path to the flatpak executable that will be written
                        into exported <filename>.desktop</filename> files
                        and scripts when an app is installed.
                        The default is <filename>/usr/bin/flatpak</filename>,
                        unless overridden at build time by
                        <option>--bindir</option>.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_BWRAP</envar></term>

                    <listitem><para>
                        Path to the
                        <citerefentry><refentrytitle>bwrap</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                        executable that will be used to create the sandbox.
                        Depending on how Flatpak was configured at build-time,
                        the default is either to search the
                        <envar>PATH</envar>,
                        or use a vendored copy which is normally installed as
                        <filename>/usr/libexec/flatpak-bwrap</filename>.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_CONFIG_DIR</envar></term>

                    <listitem><para>
                      The location of flatpak site configuration. If this is not set,
                      <filename>/etc/flatpak</filename> is used (unless overridden at build
                      time by --sysconfdir).
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_DATA_DIR</envar></term>
                    <listitem><para>
                        The location of Flatpak's OS-level defaults and
                        integration hooks.
                        If this is not set,
                        <filename>/usr/share/flatpak</filename> is used,
                        unless overridden at build time by
                        <option>--datadir</option>.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_DBUSPROXY</envar></term>

                    <listitem><para>
                        Path to the
                        <citerefentry><refentrytitle>xdg-dbus-proxy</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                        executable that will be used to filter D-Bus
                        traffic between the sandbox and the host system.
                        Depending on how Flatpak was configured at build-time,
                        the default is either to search the
                        <envar>PATH</envar>,
                        or use a vendored copy which is normally installed as
                        <filename>/usr/libexec/flatpak-dbus-proxy</filename>.
                    </para></listitem>
                </varlistentry>

                <!-- FLATPAK_DISABLE_REVOKEFS intentionally not documented:
                     it is intended for testing and development only
                     (it forces use of the code path we would use if
                     FUSE didn't work) -->

                <varlistentry>
                    <term><envar>FLATPAK_DOWNLOAD_TMPDIR</envar></term>
                    <listitem><para>
                        Path to a directory that will be used temporarily
                        when downloading OCI layers,
                        and potentially for other downloads in future.
                        The standard <envar>TMPDIR</envar> is not used
                        for this,
                        because Flatpak apps are frequently too large to
                        fit on a tmpfs.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_FANCY_OUTPUT</envar></term>
                    <listitem><para>
                        May be set to <literal>0</literal> to avoid fancy
                        formatting when outputting to a terminal.
                        This feature is also disabled automatically when
                        standard output is not a terminal,
                        or when <envar>G_MESSAGES_DEBUG</envar> is set.
                    </para></listitem>
                </varlistentry>

                <!-- FLATPAK_FORCE_ALLOW_FUZZY_MATCHING intentionally not documented:
                     it is intended for testing and development only
                     (it forces use of the fuzzy matching code path that
                     we would normally only use when run on a tty) -->

                <varlistentry>
                    <term><envar>FLATPAK_FORCE_TEXT_AUTH</envar></term>
                    <listitem><para>
                        May be set to <literal>1</literal> to force use of
                        a simple built-in
                        <citerefentry><refentrytitle>polkit</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                        agent when authentication is required to modify
                        the system-wide installation.
                        By default,
                        the desktop environment's polkit agent is used,
                        if one is available,
                        usually resulting in a graphical prompt.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_GL_DRIVERS</envar></term>
                    <listitem><para>
                        A colon-separated list of graphics driver extensions
                        to try to use for OpenGL, Vulkan and similar APIs,
                        most-preferred first.
                        The default is to select a graphics driver
                        automatically.
                        Values in this list match the last dot-separated
                        component of the names of extensions with the
                        <literal>active-gl-driver</literal> condition.
                        Typical values are
                        <literal>default</literal>,
                        <literal>mesa-git</literal> or
                        <literal>nvidia-550-120</literal>
                        (replacing the version number by the major and minor
                        version of the <literal>nvidia</literal> kernel module).
                    </para></listitem>
                </varlistentry>

                <!-- FLATPAK_PORTAL_MOCK_FLATPAK intentionally not documented:
                     it is intended for testing and development only
                     (flatpak-portal runs it instead of the real flatpak) -->

                <!-- FLATPAK_REVOKEFS_FUSE intentionally not documented:
                     it is intended for testing and development only
                     (it replaces /usr/libexec/revokefs-fuse) -->

                <varlistentry>
                    <term><envar>FLATPAK_RUN_DIR</envar></term>

                    <listitem><para>
                      The location of flatpak runtime global files. If this is not set,
                      <filename>/run/flatpak</filename> is used.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_SYSTEM_CACHE_DIR</envar></term>

                    <listitem><para>
                      The location where temporary child repositories will be created during pulls
                      into the system-wide installation.  If this is not set, a directory in
                      <filename>/var/tmp/</filename> is used. This is useful because it is more
                      likely to be on the same filesystem as the system repository (thus increasing
                      the chances for e.g. reflink copying), and we can avoid filling the user's
                      home directory with temporary data.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_SYSTEM_DIR</envar></term>

                    <listitem><para>
                      The location of the default system-wide installation. If this is not set,
                      <filename>/var/lib/flatpak</filename> is used (unless overridden at build
                      time by <option>--localstatedir</option> or
                      <option>-Dsystem_install_dir</option>).
                    </para></listitem>
                </varlistentry>

                <!-- FLATPAK_SYSTEM_HELPER_ON_SESSION intentionally not documented:
                     it is intended for testing and development only -->

                <!-- FLATPAK_TEST_COVERAGE intentionally not documented:
                     it is intended for testing and development only -->

                <!-- FLATPAK_TRIGGERSDIR intentionally not documented:
                     it is intended for testing and development only,
                     and is mostly superseded by FLATPAK_DATA_DIR -->

                <varlistentry>
                    <term><envar>FLATPAK_TTY_PROGRESS</envar></term>

                    <listitem><para>
                        May be set to <literal>1</literal> to enable reporting
                        machine-readable progress to the terminal.
                        This feature is not currently enabled by default
                        because it uses the OSC 9;4 sequence,
                        which some terminal emulators interpret as a
                        popup notification.
                    </para></listitem>
                </varlistentry>

                <varlistentry>
                    <term><envar>FLATPAK_USER_DIR</envar></term>

                    <listitem><para>
                      The location of the per-user installation. If this is not set,
                      <filename>$XDG_DATA_HOME/flatpak</filename> is used.
                    </para></listitem>
                </varlistentry>

                <!-- FLATPAK_VALIDATE_ICON intentionally not documented:
                     it is intended for testing and development only -->
            </variablelist>
    </refsect1>

    <refsect1>
        <title>See also</title>

            <para>
                <citerefentry><refentrytitle>ostree</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                <citerefentry><refentrytitle>ostree.repo</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                <citerefentry><refentrytitle>flatpak-remote</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                <citerefentry><refentrytitle>flatpak-installation</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                <ulink url="https://www.flatpak.org">https://www.flatpak.org</ulink>
            </para>

    </refsect1>

</refentry>