package command import ( "fmt" "os" "strings" "github.com/hashicorp/terraform/addrs" "github.com/hashicorp/terraform/backend" "github.com/hashicorp/terraform/command/format" "github.com/hashicorp/terraform/states" "github.com/mitchellh/cli" ) // StateShowCommand is a Command implementation that shows a single resource. type StateShowCommand struct { Meta StateMeta } func (c *StateShowCommand) Run(args []string) int { args = c.Meta.process(args) cmdFlags := c.Meta.defaultFlagSet("state show") cmdFlags.StringVar(&c.Meta.statePath, "state", "", "path") if err := cmdFlags.Parse(args); err != nil { c.Ui.Error(fmt.Sprintf("Error parsing command-line flags: %s\n", err.Error())) return 1 } args = cmdFlags.Args() if len(args) != 1 { c.Ui.Error("Exactly one argument expected.\n") return cli.RunResultHelp } // Check for user-supplied plugin path var err error if c.pluginPath, err = c.loadPluginPath(); err != nil { c.Ui.Error(fmt.Sprintf("Error loading plugin path: %s", err)) return 1 } // Load the backend b, backendDiags := c.Backend(nil) if backendDiags.HasErrors() { c.showDiagnostics(backendDiags) return 1 } // We require a local backend local, ok := b.(backend.Local) if !ok { c.Ui.Error(ErrUnsupportedLocalOp) return 1 } // Check if the address can be parsed addr, addrDiags := addrs.ParseAbsResourceInstanceStr(args[0]) if addrDiags.HasErrors() { c.Ui.Error(fmt.Sprintf(errParsingAddress, args[0])) return 1 } // We expect the config dir to always be the cwd cwd, err := os.Getwd() if err != nil { c.Ui.Error(fmt.Sprintf("Error getting cwd: %s", err)) return 1 } // Build the operation (required to get the schemas) opReq := c.Operation(b) opReq.AllowUnsetVariables = true opReq.ConfigDir = cwd opReq.ConfigLoader, err = c.initConfigLoader() if err != nil { c.Ui.Error(fmt.Sprintf("Error initializing config loader: %s", err)) return 1 } // Get the context (required to get the schemas) ctx, _, ctxDiags := local.Context(opReq) if ctxDiags.HasErrors() { c.showDiagnostics(ctxDiags) return 1 } // Get the schemas from the context schemas := ctx.Schemas() // Get the state env, err := c.Workspace() if err != nil { c.Ui.Error(fmt.Sprintf("Error selecting workspace: %s", err)) return 1 } stateMgr, err := b.StateMgr(env) if err != nil { c.Ui.Error(fmt.Sprintf(errStateLoadingState, err)) return 1 } if err := stateMgr.RefreshState(); err != nil { c.Ui.Error(fmt.Sprintf("Failed to refresh state: %s", err)) return 1 } state := stateMgr.State() if state == nil { c.Ui.Error(fmt.Sprintf(errStateNotFound)) return 1 } is := state.ResourceInstance(addr) if !is.HasCurrent() { c.Ui.Error(errNoInstanceFound) return 1 } // check if the resource has a configured provider, otherwise this will use the default provider rs := state.Resource(addr.ContainingResource()) absPc := addrs.AbsProviderConfig{ Provider: rs.ProviderConfig.Provider, Alias: rs.ProviderConfig.Alias, Module: addrs.RootModule, } singleInstance := states.NewState() singleInstance.EnsureModule(addr.Module).SetResourceInstanceCurrent( addr.Resource, is.Current, absPc, ) output := format.State(&format.StateOpts{ State: singleInstance, Color: c.Colorize(), Schemas: schemas, }) c.Ui.Output(output[strings.Index(output, "#"):]) return 0 } func (c *StateShowCommand) Help() string { helpText := ` Usage: terraform state show [options] ADDRESS Shows the attributes of a resource in the Terraform state. This command shows the attributes of a single resource in the Terraform state. The address argument must be used to specify a single resource. You can view the list of available resources with "terraform state list". Options: -state=statefile Path to a Terraform state file to use to look up Terraform-managed resources. By default it will use the state "terraform.tfstate" if it exists. ` return strings.TrimSpace(helpText) } func (c *StateShowCommand) Synopsis() string { return "Show a resource in the state" } const errNoInstanceFound = `No instance found for the given address! This command requires that the address references one specific instance. To view the available instances, use "terraform state list". Please modify the address to reference a specific instance.` const errParsingAddress = `Error parsing instance address: %s This command requires that the address references one specific instance. To view the available instances, use "terraform state list". Please modify the address to reference a specific instance.`