Method GetBuildShell

nix/nix.go:226–268

(deploymentPath string)

}

func (ctx *NixContext) GetBuildShell(deploymentPath string) (buildShell *string, err error) {

	nixEvalInvocationArgs := NixEvalInvocationArgs{
		AsJSON:         true,
		Attr:           "info.buildShell",
		DeploymentPath: deploymentPath,
		NixContext:     *ctx,
		Strict:         true,
	}

	jsonArgs, err := json.Marshal(nixEvalInvocationArgs)
	if err != nil {
		return buildShell, err
	}

	cmd := exec.Command(ctx.EvalCmd, nixEvalInvocationArgs.ToNixInstantiateArgs()...)

	var stdout bytes.Buffer
	cmd.Stdout = &stdout
	cmd.Stderr = os.Stderr

	utils.AddFinalizer(func() {
		if (cmd.ProcessState == nil || !cmd.ProcessState.Exited()) && cmd.Process != nil {
			_ = cmd.Process.Signal(syscall.SIGTERM)
		}
	})
	cmd.Env = os.Environ()
	cmd.Env = append(cmd.Env, fmt.Sprintf("MORPH_ARGS=%s", jsonArgs))
	err = cmd.Run()
	if err != nil {
		errorMessage := fmt.Sprintf(
			"Error while running `%s ..`: %s", ctx.EvalCmd, err.Error(),
		)
		return buildShell, errors.New(errorMessage)
	}

	err = json.Unmarshal(stdout.Bytes(), &buildShell)
	if err != nil {
		return nil, err
	}

	return buildShell, nil
}

func (ctx *NixContext) EvalHosts(deploymentPath string, attr string) (string, error) {
	attribute := "nodes." + attr