man 1 flatpak-build-init

FLATPAK BUILD-INIT(1)         flatpak build-init         FLATPAK BUILD-INIT(1)

NAME
       flatpak-build-init - Initialize a build directory

SYNOPSIS
       flatpak build-init [OPTION...] DIRECTORY APPNAME SDK RUNTIME [BRANCH]

DESCRIPTION
       Initializes a separate build directory.  DIRECTORY is the name of the
       directory.  APPNAME is the application id of the app that will be
       built.  SDK and RUNTIME specify the sdk and runtime that the
       application should be built against and run in.  BRANCH specify the
       version of sdk and runtime

       Initializes a directory as build directory which can be used as target
       directory of flatpak build. It creates a metadata inside the given
       directory. Additionally, empty files and var subdirectories are
       created.

       It is an error to run build-init on a directory that has already been
       initialized as a build directory.

OPTIONS
       The following options are understood:

       -h, --help
           Show help options and exit.

       --arch=ARCH
           The architecture to use. See flatpak --supported-arches for
           architectures supported by the host.

       -v, --var=RUNTIME
           Initialize var from the named runtime.

       -w, --writable-sdk
           Initialize /usr with a copy of the sdk, which is writable during
           flatpak build. This can be used if you need to install build tools
           in /usr during the build. This is stored in the usr subdirectory of
           the app dir, but will not be part of the final app.

       --tag=TAG
           Add a tag to the metadata file. This option can be used multiple
           times.

       --sdk-extension=EXTENSION
           When using --writable-sdk, in addition to the sdk, also install the
           specified extension. This option can be used multiple times.

       --extension=NAME=VARIABLE[=VALUE]
           Add extension point info.

       --sdk-dir
           Specify a custom subdirectory to use instead of usr for
           --writable-sdk.

       --update
           Re-initialize the sdk and var, don't fail if already initialized.

       --base=APP
           Initialize the application with files from another specified
           application.

       --base-version=VERSION
           Specify the version to use for --base. If not specified, will
           default to "master".

       --base-extension=EXTENSION
           When using --base, also install the specified extension from the
           app. This option can be used multiple times.

       --type=TYPE
           This can be used to build different types of things. The default is
           "app" which is a regular app, but "runtime" creates a runtime based
           on an existing runtime, and "extension" creates an extension for an
           app or runtime.

       --extension-tag=EXTENSION_TAG
           If building an extension, the tag to use when searching for the
           mount point of the extension.

       --verbose
           Print debug information during command processing.

       --ostree-verbose
           Print OSTree debug information during command processing.

EXAMPLES
       $ flatpak build-init /build/my-app org.example.myapp org.gnome.Sdk
       org.gnome.Platform 3.36

SEE ALSO
       flatpak(1), flatpak-build(1), flatpak-build-finish(1), flatpak-build-
       export(1)

flatpak                                                  FLATPAK BUILD-INIT(1)