package command import ( "fmt" "strings" "github.com/hashicorp/terraform/backend" "github.com/hashicorp/terraform/command/arguments" "github.com/hashicorp/terraform/command/views" "github.com/hashicorp/terraform/plans/planfile" "github.com/hashicorp/terraform/tfdiags" ) // ApplyCommand is a Command implementation that applies a Terraform // configuration and actually builds or changes infrastructure. type ApplyCommand struct { Meta // If true, then this apply command will become the "destroy" // command. It is just like apply but only processes a destroy. Destroy bool } func (c *ApplyCommand) 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.ParseApply(rawArgs) // Instantiate the view, even if there are flag errors, so that we render // diagnostics according to the desired view var view views.Apply view = views.NewApply(args.ViewType, c.Destroy, c.RunningInAutomation, c.View) if diags.HasErrors() { view.Diagnostics(diags) view.HelpPrompt() return 1 } // Check for user-supplied plugin path var err error if c.pluginPath, err = c.loadPluginPath(); err != nil { diags = diags.Append(err) view.Diagnostics(diags) return 1 } // Attempt to load the plan file, if specified planFile, diags := c.LoadPlanFile(args.PlanPath) if diags.HasErrors() { view.Diagnostics(diags) return 1 } // Check for invalid combination of plan file and variable overrides if planFile != nil && !args.Vars.Empty() { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Can't set variables when applying a saved plan", "The -var and -var-file options cannot be used when applying a saved plan file, because a saved plan includes the variable values that were set when it was created.", )) view.Diagnostics(diags) return 1 } // FIXME: the -input flag value is needed to initialize the backend and the // operation, but there is no clear path to pass this value down, so we // continue to mutate the Meta object state for now. c.Meta.input = args.InputEnabled // FIXME: the -parallelism flag is used to control the concurrency of // Terraform operations. At the moment, this value is used both to // initialize the backend via the ContextOpts field inside CLIOpts, and to // set a largely unused field on the Operation request. Again, there is no // clear path to pass this value down, so we continue to mutate the Meta // object state for now. c.Meta.parallelism = args.Operation.Parallelism // Prepare the backend, passing the plan file if present, and the // backend-specific arguments be, beDiags := c.PrepareBackend(planFile, args.State) diags = diags.Append(beDiags) if diags.HasErrors() { view.Diagnostics(diags) return 1 } // Build the operation request opReq, opDiags := c.OperationRequest(be, view, planFile, args.Operation, args.AutoApprove) diags = diags.Append(opDiags) // Collect variable value and add them to the operation request diags = diags.Append(c.GatherVariables(opReq, args.Vars)) // Before we delegate to the backend, we'll print any warning diagnostics // we've accumulated here, since the backend will start fresh with its own // diagnostics. view.Diagnostics(diags) if diags.HasErrors() { return 1 } diags = nil // Run the operation op, err := c.RunOperation(be, opReq) if err != nil { diags = diags.Append(err) view.Diagnostics(diags) return 1 } if op.Result != backend.OperationSuccess { return op.Result.ExitStatus() } // // Render the resource count and outputs view.ResourceCount(args.State.StateOutPath) if !c.Destroy && op.State != nil { view.Outputs(op.State.RootModule().OutputValues) } view.Diagnostics(diags) if diags.HasErrors() { return 1 } return 0 } func (c *ApplyCommand) LoadPlanFile(path string) (*planfile.Reader, tfdiags.Diagnostics) { var planFile *planfile.Reader var diags tfdiags.Diagnostics // Try to load plan if path is specified if path != "" { var err error planFile, err = c.PlanFile(path) if err != nil { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, fmt.Sprintf("Failed to load %q as a plan file", path), fmt.Sprintf("Error: %s", err), )) return nil, diags } // If the path doesn't look like a plan, both planFile and err will be // nil. In that case, the user is probably trying to use the positional // argument to specify a configuration path. Point them at -chdir. if planFile == nil { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, fmt.Sprintf("Failed to load %q as a plan file", path), "The specified path is a directory, not a plan file. You can use the global -chdir flag to use this directory as the configuration root.", )) return nil, diags } // If we successfully loaded a plan but this is a destroy operation, // explain that this is not supported. if c.Destroy { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Destroy can't be called with a plan file", fmt.Sprintf("If this plan was created using plan -destroy, apply it using:\n terraform apply %q", path), )) return nil, diags } } return planFile, diags } func (c *ApplyCommand) PrepareBackend(planFile *planfile.Reader, args *arguments.State) (backend.Enhanced, tfdiags.Diagnostics) { var diags tfdiags.Diagnostics // FIXME: we need to apply the state arguments to the meta object here // because they are later used when initializing the backend. Carving a // path to pass these arguments to the functions that need them is // difficult but would make their use easier to understand. c.Meta.applyStateArguments(args) // Load the backend var be backend.Enhanced var beDiags tfdiags.Diagnostics if planFile == nil { backendConfig, configDiags := c.loadBackendConfig(".") diags = diags.Append(configDiags) if configDiags.HasErrors() { return nil, diags } be, beDiags = c.Backend(&BackendOpts{ Config: backendConfig, }) } else { plan, err := planFile.ReadPlan() if err != nil { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Failed to read plan from plan file", fmt.Sprintf("Cannot read the plan from the given plan file: %s.", err), )) return nil, diags } if plan.Backend.Config == nil { // Should never happen; always indicates a bug in the creation of the plan file diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Failed to read plan from plan file", "The given plan file does not have a valid backend configuration. This is a bug in the Terraform command that generated this plan file.", )) return nil, diags } be, beDiags = c.BackendForPlan(plan.Backend) } diags = diags.Append(beDiags) if beDiags.HasErrors() { return nil, diags } return be, diags } func (c *ApplyCommand) OperationRequest( be backend.Enhanced, view views.Apply, planFile *planfile.Reader, args *arguments.Operation, autoApprove bool, ) (*backend.Operation, tfdiags.Diagnostics) { var diags tfdiags.Diagnostics // Applying changes with dev overrides in effect could make it impossible // to switch back to a release version if the schema isn't compatible, // so we'll warn about it. diags = diags.Append(c.providerDevOverrideRuntimeWarnings()) // Build the operation opReq := c.Operation(be) opReq.AutoApprove = autoApprove opReq.ConfigDir = "." opReq.Destroy = c.Destroy opReq.Hooks = view.Hooks() opReq.PlanFile = planFile opReq.PlanRefresh = args.Refresh opReq.Targets = args.Targets opReq.Type = backend.OperationTypeApply opReq.View = view.Operation() var err error opReq.ConfigLoader, err = c.initConfigLoader() if err != nil { diags = diags.Append(fmt.Errorf("Failed to initialize config loader: %s", err)) return nil, diags } return opReq, diags } func (c *ApplyCommand) GatherVariables(opReq *backend.Operation, args *arguments.Vars) tfdiags.Diagnostics { var diags tfdiags.Diagnostics // FIXME the arguments package currently trivially gathers variable related // arguments in a heterogenous slice, in order to minimize the number of // code paths gathering variables during the transition to this structure. // Once all commands that gather variables have been converted to this // structure, we could move the variable gathering code to the arguments // package directly, removing this shim layer. varArgs := args.All() items := make([]rawFlag, len(varArgs)) for i := range varArgs { items[i].Name = varArgs[i].Name items[i].Value = varArgs[i].Value } c.Meta.variableArgs = rawFlags{items: &items} opReq.Variables, diags = c.collectVariableValues() return diags } func (c *ApplyCommand) Help() string { if c.Destroy { return c.helpDestroy() } return c.helpApply() } func (c *ApplyCommand) Synopsis() string { if c.Destroy { return "Destroy previously-created infrastructure" } return "Create or update infrastructure" } func (c *ApplyCommand) helpApply() string { helpText := ` Usage: terraform [global options] apply [options] [PLAN] Creates or updates infrastructure according to Terraform configuration files in the current directory. By default, Terraform will generate a new plan and present it for your approval before taking any action. You can optionally provide a plan file created by a previous call to "terraform plan", in which case Terraform will take the actions described in that plan without any confirmation prompt. Options: -auto-approve Skip interactive approval of plan before applying. -backup=path Path to backup the existing state file before modifying. Defaults to the "-state-out" path with ".backup" extension. Set to "-" to disable backup. -compact-warnings If Terraform produces any warnings that are not accompanied by errors, show them in a more compact form that includes only the summary messages. -lock=true Lock the state file when locking is supported. -lock-timeout=0s Duration to retry a state lock. -input=true Ask for input for variables if not directly set. -no-color If specified, output won't contain any color. -parallelism=n Limit the number of parallel resource operations. Defaults to 10. -refresh=true Update state prior to checking for differences. This has no effect if a plan file is given to apply. -state=path Path to read and save state (unless state-out is specified). Defaults to "terraform.tfstate". -state-out=path Path to write state to that is different than "-state". This can be used to preserve the old state. -target=resource Resource to target. Operation will be limited to this resource and its dependencies. This flag can be used multiple times. -var 'foo=bar' Set a variable in the Terraform configuration. This flag can be set multiple times. -var-file=foo Set variables in the Terraform configuration from a file. If "terraform.tfvars" or any ".auto.tfvars" files are present, they will be automatically loaded. ` return strings.TrimSpace(helpText) } func (c *ApplyCommand) helpDestroy() string { helpText := ` Usage: terraform [global options] destroy [options] Destroy Terraform-managed infrastructure. Options: -auto-approve Skip interactive approval before destroying. -lock=true Lock the state file when locking is supported. -lock-timeout=0s Duration to retry a state lock. -no-color If specified, output won't contain any color. -parallelism=n Limit the number of concurrent operations. Defaults to 10. -refresh=true Update state prior to checking for differences. This has no effect if a plan file is given to apply. -target=resource Resource to target. Operation will be limited to this resource and its dependencies. This flag can be used multiple times. -var 'foo=bar' Set a variable in the Terraform configuration. This flag can be set multiple times. -var-file=foo Set variables in the Terraform configuration from a file. If "terraform.tfvars" or any ".auto.tfvars" files are present, they will be automatically loaded. -state, state-out, and -backup are legacy options supported for the local backend only. For more information, see the local backend's documentation. ` return strings.TrimSpace(helpText) }