129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package command
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import (
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"flag"
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"fmt"
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"sort"
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"strings"
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)
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// OutputCommand is a Command implementation that reads an output
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// from a Terraform state and prints it.
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type OutputCommand struct {
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Meta
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}
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func (c *OutputCommand) Run(args []string) int {
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args = c.Meta.process(args, false)
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var module string
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cmdFlags := flag.NewFlagSet("output", flag.ContinueOnError)
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cmdFlags.StringVar(&c.Meta.statePath, "state", DefaultStateFilename, "path")
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cmdFlags.StringVar(&module, "module", "", "module")
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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 output command expects exactly one argument with the name\n" +
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"of an output variable or no arguments to show all outputs.\n")
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cmdFlags.Usage()
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return 1
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}
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name := ""
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if len(args) > 0 {
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name = args[0]
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}
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stateStore, err := c.Meta.State()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error reading state: %s", err))
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return 1
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}
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if module == "" {
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module = "root"
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} else {
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module = "root." + module
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}
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// Get the proper module we want to get outputs for
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modPath := strings.Split(module, ".")
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state := stateStore.State()
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mod := state.ModuleByPath(modPath)
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if mod == nil {
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c.Ui.Error(fmt.Sprintf(
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"The module %s could not be found. There is nothing to output.",
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module))
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return 1
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}
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if state.Empty() || len(mod.Outputs) == 0 {
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c.Ui.Error(fmt.Sprintf(
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"The state file has no outputs defined. Define an output\n" +
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"in your configuration with the `output` directive and re-run\n" +
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"`terraform apply` for it to become available."))
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return 1
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}
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if name == "" {
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ks := make([]string, 0, len(mod.Outputs))
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for k, _ := range mod.Outputs {
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ks = append(ks, k)
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}
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sort.Strings(ks)
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for _, k := range ks {
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v := mod.Outputs[k]
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c.Ui.Output(fmt.Sprintf("%s = %s", k, v))
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}
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return 0
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}
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v, ok := mod.Outputs[name]
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if !ok {
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c.Ui.Error(fmt.Sprintf(
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"The output variable requested could not be found in the state\n" +
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"file. If you recently added this to your configuration, be\n" +
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"sure to run `terraform apply`, since the state won't be updated\n" +
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"with new output variables until that command is run."))
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return 1
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}
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c.Ui.Output(v)
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return 0
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}
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func (c *OutputCommand) Help() string {
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helpText := `
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Usage: terraform output [options] [NAME]
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Reads an output variable from a Terraform state file and prints
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the value. If NAME is not specified, all outputs are printed.
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Options:
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-state=path Path to the state file to read. Defaults to
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"terraform.tfstate".
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-no-color If specified, output won't contain any color.
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-module=name If specified, returns the outputs for a
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specific module
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`
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return strings.TrimSpace(helpText)
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}
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func (c *OutputCommand) Synopsis() string {
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return "Read an output from a state file"
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}
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