terraform/command/state_show.go

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package command
import (
"fmt"
"sort"
"strings"
"github.com/hashicorp/terraform/terraform"
"github.com/mitchellh/cli"
"github.com/ryanuber/columnize"
)
// StateShowCommand is a Command implementation that shows a single resource.
type StateShowCommand struct {
Meta
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StateMeta
}
func (c *StateShowCommand) Run(args []string) int {
args = c.Meta.process(args, true)
cmdFlags := c.Meta.flagSet("state show")
cmdFlags.StringVar(&c.Meta.statePath, "state", DefaultStateFilename, "path")
if err := cmdFlags.Parse(args); err != nil {
return cli.RunResultHelp
}
args = cmdFlags.Args()
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// Load the backend
b, err := c.Backend(nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to load backend: %s", err))
return 1
}
// Get the state
env := c.Workspace()
state, err := b.State(env)
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if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
return 1
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}
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if err := state.RefreshState(); err != nil {
c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
return 1
}
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stateReal := state.State()
if stateReal == nil {
c.Ui.Error(fmt.Sprintf(errStateNotFound))
return 1
}
filter := &terraform.StateFilter{State: stateReal}
results, err := filter.Filter(args...)
if err != nil {
c.Ui.Error(fmt.Sprintf(errStateFilter, err))
return 1
}
if len(results) == 0 {
return 0
}
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instance, err := c.filterInstance(results)
if err != nil {
c.Ui.Error(err.Error())
return 1
}
if instance == nil {
return 0
}
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is := instance.Value.(*terraform.InstanceState)
// Sort the keys
var keys []string
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for k, _ := range is.Attributes {
keys = append(keys, k)
}
sort.Strings(keys)
// Build the output
var output []string
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output = append(output, fmt.Sprintf("id | %s", is.ID))
for _, k := range keys {
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if k != "id" {
output = append(output, fmt.Sprintf("%s | %s", k, is.Attributes[k]))
}
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}
// Output
config := columnize.DefaultConfig()
config.Glue = " = "
c.Ui.Output(columnize.Format(output, config))
return 0
}
func (c *StateShowCommand) Help() string {
helpText := `
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Usage: terraform state show [options] ADDRESS
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Shows the attributes of a resource in the Terraform state.
This command shows the attributes of a single resource in the Terraform
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state. The address argument must be used to specify a single resource.
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You can view the list of available resources with "terraform state list".
Options:
-state=statefile Path to a Terraform state file to use to look
up Terraform-managed resources. By default it will
use the state "terraform.tfstate" if it exists.
`
return strings.TrimSpace(helpText)
}
func (c *StateShowCommand) Synopsis() string {
return "Show a resource in the state"
}