Golang State.Empty方法代碼示例

func (c *RemoteConfigCommand) Run(args []string) int {
	args = c.Meta.process(args, false)
	config := make(map[string]string)
	cmdFlags := flag.NewFlagSet("remote", flag.ContinueOnError)
	cmdFlags.BoolVar(&c.conf.disableRemote, "disable", false, "")
	cmdFlags.BoolVar(&c.conf.pullOnDisable, "pull", true, "")
	cmdFlags.StringVar(&c.conf.statePath, "state", DefaultStateFilename, "path")
	cmdFlags.StringVar(&c.conf.backupPath, "backup", "", "path")
	cmdFlags.StringVar(&c.remoteConf.Type, "backend", "atlas", "")
	cmdFlags.Var((*FlagKV)(&config), "backend-config", "config")
	cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
	if err := cmdFlags.Parse(args); err != nil {
		c.Ui.Error(fmt.Sprintf("\nError parsing CLI flags: %s", err))
		return 1
	}

	// Lowercase the type
	c.remoteConf.Type = strings.ToLower(c.remoteConf.Type)

	// Set the local state path
	c.statePath = c.conf.statePath

	// Populate the various configurations
	c.remoteConf.Config = config

	// Get the state information. We specifically request the cache only
	// for the remote state here because it is possible the remote state
	// is invalid and we don't want to error.
	stateOpts := c.StateOpts()
	stateOpts.RemoteCacheOnly = true
	if _, err := c.StateRaw(stateOpts); err != nil {
		c.Ui.Error(fmt.Sprintf("Error loading local state: %s", err))
		return 1
	}

	// Get the local and remote [cached] state
	localState := c.stateResult.Local.State()
	var remoteState *terraform.State
	if remote := c.stateResult.Remote; remote != nil {
		remoteState = remote.State()
	}

	// Check if remote state is being disabled
	if c.conf.disableRemote {
		if !remoteState.IsRemote() {
			c.Ui.Error(fmt.Sprintf("Remote state management not enabled! Aborting."))
			return 1
		}
		if !localState.Empty() {
			c.Ui.Error(fmt.Sprintf("State file already exists at '%s'. Aborting.",
				c.conf.statePath))
			return 1
		}

		return c.disableRemoteState()
	}

	// Ensure there is no conflict, and then do the correct operation
	var result int
	haveCache := !remoteState.Empty()
	haveLocal := !localState.Empty()
	switch {
	case haveCache && haveLocal:
		c.Ui.Error(fmt.Sprintf("Remote state is enabled, but non-managed state file '%s' is also present!",
			c.conf.statePath))
		result = 1

	case !haveCache && !haveLocal:
		// If we don't have either state file, initialize a blank state file
		result = c.initBlankState()

	case haveCache && !haveLocal:
		// Update the remote state target potentially
		result = c.updateRemoteConfig()

	case !haveCache && haveLocal:
		// Enable remote state management
		result = c.enableRemoteState()
	}

	// If there was an error, return right away
	if result != 0 {
		return result
	}

	// If we're not pulling, then do nothing
	if !c.conf.pullOnDisable {
		return result
	}

	// Otherwise, refresh the state
	stateResult, err := c.StateRaw(c.StateOpts())
	if err != nil {
		c.Ui.Error(fmt.Sprintf(
			"Error while performing the initial pull. The error message is shown\n"+
				"below. Note that remote state was properly configured, so you don't\n"+
				"need to reconfigure. You can now use `push` and `pull` directly.\n"+
				"\n%s", err))
		return 1
	}
//.........這裏部分代碼省略.........

// Test performs an acceptance test on a resource.
//
// Tests are not run unless an environmental variable "TF_ACC" is
// set to some non-empty value. This is to avoid test cases surprising
// a user by creating real resources.
//
// Tests will fail unless the verbose flag (`go test -v`, or explicitly
// the "-test.v" flag) is set. Because some acceptance tests take quite
// long, we require the verbose flag so users are able to see progress
// output.
func Test(t TestT, c TestCase) {
	// We only run acceptance tests if an env var is set because they're
	// slow and generally require some outside configuration.
	if os.Getenv(TestEnvVar) == "" {
		t.Skip(fmt.Sprintf(
			"Acceptance tests skipped unless env '%s' set",
			TestEnvVar))
		return
	}

	isUnitTest := (os.Getenv(TestEnvVar) == UnitTestOverride)

	logWriter, err := logging.LogOutput()
	if err != nil {
		t.Error(fmt.Errorf("error setting up logging: %s", err))
	}
	log.SetOutput(logWriter)

	// We require verbose mode so that the user knows what is going on.
	if !testTesting && !testing.Verbose() && !isUnitTest {
		t.Fatal("Acceptance tests must be run with the -v flag on tests")
		return
	}

	// Run the PreCheck if we have it
	if c.PreCheck != nil {
		c.PreCheck()
	}

	// Build our context options that we can
	ctxProviders := c.ProviderFactories
	if ctxProviders == nil {
		ctxProviders = make(map[string]terraform.ResourceProviderFactory)
		for k, p := range c.Providers {
			ctxProviders[k] = terraform.ResourceProviderFactoryFixed(p)
		}
	}
	opts := terraform.ContextOpts{Providers: ctxProviders}

	// A single state variable to track the lifecycle, starting with no state
	var state *terraform.State

	// Go through each step and run it
	var idRefreshCheck *terraform.ResourceState
	idRefresh := c.IDRefreshName != ""
	errored := false
	for i, step := range c.Steps {
		var err error
		log.Printf("[WARN] Test: Executing step %d", i)
		state, err = testStep(opts, state, step)
		if err != nil {
			errored = true
			t.Error(fmt.Sprintf(
				"Step %d error: %s", i, err))
			break
		}

		// If we've never checked an id-only refresh and our state isn't
		// empty, find the first resource and test it.
		if idRefresh && idRefreshCheck == nil && !state.Empty() {
			// Find the first non-nil resource in the state
			for _, m := range state.Modules {
				if len(m.Resources) > 0 {
					if v, ok := m.Resources[c.IDRefreshName]; ok {
						idRefreshCheck = v
					}

					break
				}
			}

			// If we have an instance to check for refreshes, do it
			// immediately. We do it in the middle of another test
			// because it shouldn't affect the overall state (refresh
			// is read-only semantically) and we want to fail early if
			// this fails. If refresh isn't read-only, then this will have
			// caught a different bug.
			if idRefreshCheck != nil {
				log.Printf(
					"[WARN] Test: Running ID-only refresh check on %s",
					idRefreshCheck.Primary.ID)
				if err := testIDOnlyRefresh(c, opts, step, idRefreshCheck); err != nil {
					log.Printf("[ERROR] Test: ID-only test failed: %s", err)
					t.Error(fmt.Sprintf(
						"ID-Only refresh test failure: %s", err))
					break
				}
			}
		}
	}
//.........這裏部分代碼省略.........