`Format=`, `--format=`, `-t`
-: The image format type to generate. One of `directory` (for generating
- OS images inside a local directory), `tar` (similar, but a tarball of
- the image is generated), `cpio` (similar, but a cpio archive is
- generated), `disk` (a block device image with a GPT partition table),
- `uki` (a unified kernel image) or `none` (the image is solely intended
- as a build image to produce another artifact).
+: The image format type to generate. One of `directory` (for generating an OS
+ image directly in a local directory), `tar` (similar, but a tarball of the OS
+ image is generated), `cpio` (similar, but a cpio archive is generated),
+ `disk` (a block device OS image with a GPT partition table), `uki` (a unified
+ kernel image with the OS image in the `.initrd` PE section) or `none` (the OS
+ image is solely intended as a build image to produce another artifact).
`ManifestFormat=`, `--manifest-format=`