152 lines
3.6 KiB
Go
152 lines
3.6 KiB
Go
package command
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import (
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"flag"
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"fmt"
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"os"
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"strings"
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"github.com/hashicorp/terraform/config"
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"github.com/hashicorp/terraform/terraform"
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"github.com/mitchellh/cli"
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)
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// ApplyCommand is a Command implementation that applies a Terraform
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// configuration and actually builds or changes infrastructure.
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type ApplyCommand struct {
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TFConfig *terraform.Config
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Ui cli.Ui
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}
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func (c *ApplyCommand) Run(args []string) int {
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var init bool
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var statePath, stateOutPath string
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cmdFlags := flag.NewFlagSet("apply", flag.ContinueOnError)
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cmdFlags.BoolVar(&init, "init", false, "init")
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cmdFlags.StringVar(&statePath, "state", "terraform.tfstate", "path")
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cmdFlags.StringVar(&stateOutPath, "state-out", "", "path")
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cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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args = cmdFlags.Args()
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if len(args) != 1 {
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c.Ui.Error(
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"The apply command expects only one argument with the path\n" +
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"to a Terraform configuration.\n")
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cmdFlags.Usage()
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return 1
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}
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if statePath == "" {
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c.Ui.Error("-state cannot be blank")
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return 1
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}
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if stateOutPath == "" {
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stateOutPath = statePath
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}
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if !init {
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if _, err := os.Stat(statePath); err != nil {
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c.Ui.Error(fmt.Sprintf(
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"There was an error reading the state file. The path\n"+
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"and error are shown below. If you're trying to build a\n"+
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"brand new infrastructure, explicitly pass the '-init'\n"+
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"flag to Terraform to tell it it is okay to build new\n"+
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"state.\n\n"+
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"Path: %s\n"+
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"Error: %s",
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statePath,
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err))
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return 1
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}
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}
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// Load up the state
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var state *terraform.State
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if !init {
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f, err := os.Open(statePath)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error loading state: %s", err))
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return 1
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}
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state, err = terraform.ReadState(f)
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f.Close()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error loading state: %s", err))
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return 1
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}
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}
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b, err := config.Load(args[0])
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error loading blueprint: %s", err))
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return 1
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}
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c.TFConfig.Hooks = append(c.TFConfig.Hooks, &UiHook{Ui: c.Ui})
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tf, err := terraform.New(c.TFConfig)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing Terraform: %s", err))
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return 1
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}
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plan, err := tf.Plan(b, state, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error running plan: %s", err))
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return 1
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}
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state, err = tf.Apply(plan)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error applying plan: %s", err))
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return 1
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}
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// Write state out to the file
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f, err := os.Create(stateOutPath)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to save state: %s", err))
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return 1
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}
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defer f.Close()
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if err := terraform.WriteState(state, f); err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to save state: %s", err))
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return 1
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}
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c.Ui.Output(strings.TrimSpace(state.String()))
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return 0
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}
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func (c *ApplyCommand) Help() string {
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helpText := `
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Usage: terraform apply [terraform.tf]
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Builds or changes infrastructure according to the Terraform configuration
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file.
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Options:
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-init If specified, it is okay to build brand new
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infrastructure (with no state file specified).
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-state=terraform.tfstate Path to the state file to build off of. This file
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will also be written to with updated state unless
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-state-out is specified.
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-state-out=file.tfstate Path to save the new state. If not specified, the
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-state value will be used.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *ApplyCommand) Synopsis() string {
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return "Builds or changes infrastructure according to Terrafiles"
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}
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