package command import ( "fmt" "strings" "github.com/hashicorp/terraform/command/arguments" "github.com/hashicorp/terraform/command/views" "github.com/hashicorp/terraform/states" "github.com/hashicorp/terraform/tfdiags" ) // OutputCommand is a Command implementation that reads an output // from a Terraform state and prints it. type OutputCommand struct { Meta } func (c *OutputCommand) Run(rawArgs []string) int { // Parse and apply global view arguments common, rawArgs := arguments.ParseView(rawArgs) c.View.Configure(common) // Parse and validate flags args, diags := arguments.ParseOutput(rawArgs) if diags.HasErrors() { c.View.Diagnostics(diags) c.View.HelpPrompt("output") return 1 } view := views.NewOutput(args.ViewType, c.View) // Fetch data from state outputs, diags := c.Outputs(args.StatePath) if diags.HasErrors() { view.Diagnostics(diags) return 1 } // Render the view viewDiags := view.Output(args.Name, outputs) diags = diags.Append(viewDiags) view.Diagnostics(diags) if diags.HasErrors() { return 1 } return 0 } func (c *OutputCommand) Outputs(statePath string) (map[string]*states.OutputValue, tfdiags.Diagnostics) { var diags tfdiags.Diagnostics // Allow state path override if statePath != "" { c.Meta.statePath = statePath } // Load the backend b, backendDiags := c.Backend(nil) diags = diags.Append(backendDiags) if diags.HasErrors() { return nil, diags } // This is a read-only command c.ignoreRemoteBackendVersionConflict(b) env, err := c.Workspace() if err != nil { diags = diags.Append(fmt.Errorf("Error selecting workspace: %s", err)) return nil, diags } // Get the state stateStore, err := b.StateMgr(env) if err != nil { diags = diags.Append(fmt.Errorf("Failed to load state: %s", err)) return nil, diags } if err := stateStore.RefreshState(); err != nil { diags = diags.Append(fmt.Errorf("Failed to load state: %s", err)) return nil, diags } state := stateStore.State() if state == nil { state = states.NewState() } return state.RootModule().OutputValues, nil } func (c *OutputCommand) Help() string { helpText := ` Usage: terraform output [options] [NAME] Reads an output variable from a Terraform state file and prints the value. With no additional arguments, output will display all the outputs for the root module. If NAME is not specified, all outputs are printed. Options: -state=path Path to the state file to read. Defaults to "terraform.tfstate". -no-color If specified, output won't contain any color. -json If specified, machine readable output will be printed in JSON format. -raw For value types that can be automatically converted to a string, will print the raw string directly, rather than a human-oriented representation of the value. ` return strings.TrimSpace(helpText) } func (c *OutputCommand) Synopsis() string { return "Show output values from your root module" }