terraform/command/apply.go

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package command
import (
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"flag"
"fmt"
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"os"
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"strings"
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"github.com/hashicorp/terraform/terraform"
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"github.com/mitchellh/cli"
)
// ApplyCommand is a Command implementation that applies a Terraform
// configuration and actually builds or changes infrastructure.
type ApplyCommand struct {
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TFConfig *terraform.Config
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
var stateOutPath string
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cmdFlags := flag.NewFlagSet("apply", flag.ContinueOnError)
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cmdFlags.BoolVar(&init, "init", false, "init")
cmdFlags.StringVar(&stateOutPath, "out", "", "path")
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cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
args = cmdFlags.Args()
if len(args) != 2 {
c.Ui.Error("The apply command expects two arguments.\n")
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cmdFlags.Usage()
return 1
}
statePath := args[0]
configPath := args[1]
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if stateOutPath == "" {
stateOutPath = statePath
}
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// Initialize Terraform right away
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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 {
c.Ui.Error(fmt.Sprintf("Error initializing Terraform: %s", err))
return 1
}
// Attempt to read a plan from the path given. This is how we test that
// it is a plan or not (kind of jank, but if it quacks like a duck...)
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planStatePath := statePath
if init {
planStatePath = ""
}
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plan, err := PlanArg(configPath, planStatePath, tf)
if err != nil {
c.Ui.Error(err.Error())
return 1
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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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// Write state out to the file
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f, err := os.Create(stateOutPath)
if err == nil {
err = terraform.WriteState(state, f)
f.Close()
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}
if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to save state: %s", err))
return 1
}
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c.Ui.Output(strings.TrimSpace(state.String()))
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return 0
}
func (c *ApplyCommand) Help() string {
helpText := `
Usage: terraform apply [options] STATE PATH
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Builds or changes infrastructure according to the Terraform configuration
file.
Options:
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-init If specified, it is okay to build brand new
infrastructure (with no state file specified).
-out=file.tfstate Path to save the new state. If not specified, the
state path argument will be used.
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`
return strings.TrimSpace(helpText)
}
func (c *ApplyCommand) Synopsis() string {
return "Builds or changes infrastructure"
}