provider

const (
	ErrorType           = "error"
	InfoType            = "info"
	SetEnvType          = "setenv"
	RawSetEnvType       = "rawsetenv"
	DebugType           = "debug"
	PublishEndpointType = "publish-endpoint"

	// GetServiceConfigType is a message the provider sends to receive, on
	// its stdin, one JSON line holding the resolved canonical configuration
	// of the service it manages — answered from the in-memory model.
	GetServiceConfigType = "get-service-config"

	// GetRelayInfoType is a message the provider sends to receive, on its
	// stdin, one JSON line describing the project networks the relay
	// standing in for this service would join, with each network's gateway
	// address. Only meaningful for a provider running its service LOCALLY:
	// the gateway is an address the host owns on the network's bridge, so
	// an endpoint bound to it is reachable from the relay without being
	// exposed on the LAN. A provider backing the service with a remote
	// resource has no use for it.
	GetRelayInfoType = "get-relay-info"

	// GetImageType is a message the provider sends during its pull command
	// to receive the service image from the local daemon: compose answers on
	// the provider's stdin with one ImageStreamType JSON line, then — unless
	// that line carries an error — the image tar encoded as an HTTP/1.1
	// chunked body (see streamImageTo).
	GetImageType = "get-image"

	// ImageStreamType is the type of the JSON line answering a get-image
	// request.
	ImageStreamType = "image-stream"

	// ComposeProviderMessagesEnv announces to the provider process, as a
	// comma-separated list, every message type this compose accepts on the
	// provider's stdout — so a provider can adapt to the compose it runs
	// under instead of emitting a message that would fail the command
	// (an unknown message type is a protocol error by design: a provider
	// REQUIRING an unsupported message must fail rather than degrade
	// silently).
	ComposeProviderMessagesEnv = "COMPOSE_PROVIDER_MESSAGES"
)