package command import ( "fmt" "strings" "github.com/hashicorp/terraform/states" "github.com/mitchellh/cli" ) // StateMvCommand is a Command implementation that shows a single resource. type StateMvCommand struct { StateMeta } func (c *StateMvCommand) Run(args []string) int { args, err := c.Meta.process(args, true) if err != nil { return 1 } // We create two metas to track the two states var backupPathOut, statePathOut string cmdFlags := c.Meta.flagSet("state mv") cmdFlags.StringVar(&c.backupPath, "backup", "-", "backup") cmdFlags.StringVar(&c.statePath, "state", "", "path") cmdFlags.StringVar(&backupPathOut, "backup-out", "-", "backup") cmdFlags.StringVar(&statePathOut, "state-out", "", "path") if err := cmdFlags.Parse(args); err != nil { return cli.RunResultHelp } args = cmdFlags.Args() if len(args) != 2 { c.Ui.Error("Exactly two arguments expected.\n") return cli.RunResultHelp } // Read the from state stateFrom, err := c.State() if err != nil { c.Ui.Error(fmt.Sprintf(errStateLoadingState, err)) return 1 } if err := stateFrom.RefreshState(); err != nil { c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err)) return 1 } stateFromReal := stateFrom.State() if stateFromReal == nil { c.Ui.Error(fmt.Sprintf(errStateNotFound)) return 1 } // Read the destination state stateTo := stateFrom stateToReal := stateFromReal if statePathOut != "" { c.statePath = statePathOut c.backupPath = backupPathOut stateTo, err = c.State() if err != nil { c.Ui.Error(fmt.Sprintf(errStateLoadingState, err)) return 1 } if err := stateTo.RefreshState(); err != nil { c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err)) return 1 } stateToReal = stateTo.State() if stateToReal == nil { stateToReal = states.NewState() } } c.Ui.Error("state mv command not yet updated for new state types") return 1 /* // Filter what we're moving filter := &terraform.StateFilter{State: stateFromReal} results, err := filter.Filter(args[0]) if err != nil { c.Ui.Error(fmt.Sprintf(errStateMv, err)) return cli.RunResultHelp } if len(results) == 0 { c.Ui.Output(fmt.Sprintf("Item to move doesn't exist: %s", args[0])) return 1 } // Get the item to add to the state add := c.addableResult(results) // Do the actual move if err := stateFromReal.Remove(args[0]); err != nil { c.Ui.Error(fmt.Sprintf(errStateMv, err)) return 1 } if err := stateToReal.Add(args[0], args[1], add); err != nil { c.Ui.Error(fmt.Sprintf(errStateMv, err)) return 1 } // Write the new state if err := stateTo.WriteState(stateToReal); err != nil { c.Ui.Error(fmt.Sprintf(errStateMvPersist, err)) return 1 } if err := stateTo.PersistState(); err != nil { c.Ui.Error(fmt.Sprintf(errStateMvPersist, err)) return 1 } // Write the old state if it is different if stateTo != stateFrom { if err := stateFrom.WriteState(stateFromReal); err != nil { c.Ui.Error(fmt.Sprintf(errStateMvPersist, err)) return 1 } if err := stateFrom.PersistState(); err != nil { c.Ui.Error(fmt.Sprintf(errStateMvPersist, err)) return 1 } } */ c.Ui.Output(fmt.Sprintf( "Moved %s to %s", args[0], args[1])) return 0 } // addableResult takes the result from a filter operation and returns what to // call State.Add with. The reason we do this is because in the module case // we must add the list of all modules returned versus just the root module. func (c *StateMvCommand) addableResult(results []*states.FilterResult) interface{} { switch v := results[0].Value.(type) { case *states.Module: // If a state module then we should add the full list of modules result := []*states.Module{v} if len(results) > 1 { for _, r := range results[1:] { if ms, ok := r.Value.(*states.Module); ok { result = append(result, ms) } } } return result default: // By default just add the first result return v } } func (c *StateMvCommand) Help() string { helpText := ` Usage: terraform state mv [options] SOURCE DESTINATION This command will move an item matched by the address given to the destination address. This command can also move to a destination address in a completely different state file. This can be used for simple resource renaming, moving items to and from a module, moving entire modules, and more. And because this command can also move data to a completely new state, it can also be used for refactoring one configuration into multiple separately managed Terraform configurations. This command will output a backup copy of the state prior to saving any changes. The backup cannot be disabled. Due to the destructive nature of this command, backups are required. If you're moving an item to a different state file, a backup will be created for each state file. Options: -backup=PATH Path where Terraform should write the backup for the original state. This can't be disabled. If not set, Terraform will write it to the same path as the statefile with a ".backup" extension. -backup-out=PATH Path where Terraform should write the backup for the destination state. This can't be disabled. If not set, Terraform will write it to the same path as the destination state file with a backup extension. This only needs to be specified if -state-out is set to a different path than -state. -state=PATH Path to the source state file. Defaults to the configured backend, or "terraform.tfstate" -state-out=PATH Path to the destination state file to write to. If this isn't specified, the source state file will be used. This can be a new or existing path. ` return strings.TrimSpace(helpText) } func (c *StateMvCommand) Synopsis() string { return "Move an item in the state" } const errStateMv = `Error moving state: %[1]s Please ensure your addresses and state paths are valid. No state was persisted. Your existing states are untouched.` const errStateMvPersist = `Error saving the state: %s The state wasn't saved properly. If the error happening after a partial write occurred, a backup file will have been created. Otherwise, the state is in the same state it was when the operation started.`