env

var (
	// TARGET_OUT environment variable
	// nolint: revive, stylecheck
	TARGET_OUT Variable = "TARGET_OUT"

	// LOCAL_OUT environment variable
	// nolint: revive, stylecheck
	LOCAL_OUT Variable = "LOCAL_OUT"

	// REPO_ROOT environment variable
	// nolint: revive, stylecheck
	REPO_ROOT Variable = "REPO_ROOT"

	// HUB is the Docker hub to be used for images.
	// nolint: revive, stylecheck
	HUB Variable = "HUB"

	// TAG is the Docker tag to be used for images.
	// nolint: revive, stylecheck
	TAG Variable = "TAG"

	// VARIANT is the Docker variant to be used for images.
	// nolint: revive, stylecheck
	VARIANT Variable = "VARIANT"

	// PULL_POLICY is the image pull policy to use when rendering templates.
	// nolint: revive, stylecheck
	PULL_POLICY Variable = "PULL_POLICY"

	// ECHO_IMAGE is the image to use when deploying echo services.
	// nolint: golint, revive, stylecheck
	ECHO_IMAGE Variable = "ECHO_IMAGE"

	// GRPC_ECHO_IMAGE is the image to use for a separate gRPC-only container in echo Pods.
	// nolint: golint, revive, stylecheck
	GRPC_ECHO_IMAGE Variable = "GRPC_ECHO_IMAGE"

	// KUBECONFIG is the list of Kubernetes configuration files. If configuration files are specified on
	// the command-line, that takes precedence.
	// nolint: revive, stylecheck
	KUBECONFIG Variable = "KUBECONFIG"

	// IstioSrc is the location of istio source ($TOP/src/istio.io/istio
	IstioSrc = REPO_ROOT.ValueOrDefaultFunc(getDefaultIstioSrc)

	// IstioOut is the location of the output directory ($TOP/out)
	IstioOut = verifyFile(TARGET_OUT, TARGET_OUT.ValueOrDefaultFunc(getDefaultIstioOut))

	// LocalOut is the location of the output directory for the OS we are running in,
	// not necessarily the OS we are building for
	LocalOut = verifyFile(LOCAL_OUT, LOCAL_OUT.ValueOrDefaultFunc(getDefaultIstioOut))

	// OtelCollectorInstallFilePath is the OpenTelemetry installation file.
	OtelCollectorInstallFilePath = path.Join(IstioSrc, getSampleFile("open-telemetry/otel.yaml"))

	// StackdriverInstallFilePath is the stackdriver installation file.
	StackdriverInstallFilePath = path.Join(IstioSrc, getInstallationFile("stackdriver/stackdriver.yaml"))

	// GCEMetadataServerInstallFilePath is the GCE Metadata Server installation file.
	GCEMetadataServerInstallFilePath = path.Join(IstioSrc, getInstallationFile("gcemetadata/gce_metadata_server.yaml"))

	// RegistryRedirectorServerInstallFilePath is the registry redirector installation file.
	RegistryRedirectorServerInstallFilePath = path.Join(IstioSrc, getInstallationFile("registryredirector/registry_redirector_server.yaml"))
)

var (

	// Root folder of this project
	// This relies on the fact this file is 3 levels up from the root; if this changes, adjust the path below
	Root = filepath.Join(filepath.Dir(b), "../../..")
)