cli

type Options struct {
	// FS is the file system Compose files are read from, its root the
	// top the project may not leave. Nil: the host's, rooted at the
	// project directory (os.OpenRoot: neither `..` nor a symbolic link
	// leaves it). A browser host passes its own.
	FS fs.FS
	// Environ is the environment interpolation reads. Nil: the process
	// environment (os.Environ).
	Environ func() []string
	// Client reaches the engine. Inside wctr it is wctr's own (-H, or the
	// playground's in-process transport: wctr's cli.Options.Extra hands
	// it over as Engine.Client). Nil: the command adds its own -H/--host
	// flag ($WCTR_HOST, else the default socket) and uses api.NewClient.
	Client func() (*api.Client, error)
	// BuildCache keeps build steps between builds. Nil: natively the
	// cache `wctr build` keeps ($XDG_CACHE_HOME/wasmcontainers); with a
	// host FS (a browser), one per build unless the host passes its own.
	BuildCache builder.Cache
}