terraform/command/show.go

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package command
import (
"flag"
"fmt"
"os"
"strings"
"github.com/hashicorp/terraform/terraform"
)
// ShowCommand is a Command implementation that reads and outputs the
// contents of a Terraform plan or state file.
type ShowCommand struct {
Meta
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}
func (c *ShowCommand) Run(args []string) int {
var moduleDepth int
args = c.Meta.process(args, false)
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cmdFlags := flag.NewFlagSet("show", flag.ContinueOnError)
cmdFlags.IntVar(&moduleDepth, "module-depth", 0, "module-depth")
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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) > 1 {
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c.Ui.Error(
"The show command expects at most one argument with the path\n" +
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"to a Terraform state or plan file.\n")
cmdFlags.Usage()
return 1
}
var path string
if len(args) > 0 {
path = args[0]
} else {
// We should use the default state if it exists.
path = DefaultStateFilename
if _, err := os.Stat(DefaultStateFilename); err != nil {
if os.IsNotExist(err) {
c.Ui.Output("No state.")
return 0
}
}
}
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var plan *terraform.Plan
var state *terraform.State
f, err := os.Open(path)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error loading file: %s", err))
return 1
}
var planErr, stateErr error
plan, err = terraform.ReadPlan(f)
if err != nil {
if _, err := f.Seek(0, 0); err != nil {
c.Ui.Error(fmt.Sprintf("Error reading file: %s", err))
return 1
}
plan = nil
planErr = err
}
if plan == nil {
state, err = terraform.ReadState(f)
if err != nil {
stateErr = err
}
}
if plan == nil && state == nil {
c.Ui.Error(fmt.Sprintf(
"Terraform couldn't read the given file as a state or plan file.\n"+
"The errors while attempting to read the file as each format are\n"+
"shown below.\n\n"+
"State read error: %s\n\nPlan read error: %s",
stateErr,
planErr))
return 1
}
if plan != nil {
c.Ui.Output(FormatPlan(&FormatPlanOpts{
Plan: plan,
Color: c.Colorize(),
ModuleDepth: moduleDepth,
}))
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return 0
}
c.Ui.Output(FormatState(&FormatStateOpts{
State: state,
Color: c.Colorize(),
ModuleDepth: moduleDepth,
}))
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return 0
}
func (c *ShowCommand) Help() string {
helpText := `
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Usage: terraform show [options] [path]
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Reads and outputs a Terraform state or plan file in a human-readable
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form. If no path is specified, the current state will be shown.
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Options:
-module-depth=n Specifies the depth of modules to show in the output.
By default this is zero. -1 will expand all.
-no-color If specified, output won't contain any color.
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`
return strings.TrimSpace(helpText)
}
func (c *ShowCommand) Synopsis() string {
return "Inspect Terraform state or plan"
}