terraform/command/show.go

185 lines
3.9 KiB
Go

package command
import (
"flag"
"fmt"
"os"
"strings"
"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/plans/planfile"
"github.com/hashicorp/terraform/states/statefile"
"github.com/hashicorp/terraform/tfdiags"
"github.com/hashicorp/terraform/command/format"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/states"
)
// ShowCommand is a Command implementation that reads and outputs the
// contents of a Terraform plan or state file.
type ShowCommand struct {
Meta
}
func (c *ShowCommand) Run(args []string) int {
args, err := c.Meta.process(args, false)
if err != nil {
return 1
}
cmdFlags := flag.NewFlagSet("show", flag.ContinueOnError)
cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
args = cmdFlags.Args()
if len(args) > 1 {
c.Ui.Error(
"The show command expects at most one argument with the path\n" +
"to a Terraform state or plan file.\n")
cmdFlags.Usage()
return 1
}
var diags tfdiags.Diagnostics
// Load the backend
b, backendDiags := c.Backend(nil)
diags = diags.Append(backendDiags)
if backendDiags.HasErrors() {
c.showDiagnostics(diags)
return 1
}
// We require a local backend
local, ok := b.(backend.Local)
if !ok {
c.showDiagnostics(diags) // in case of any warnings in here
c.Ui.Error(ErrUnsupportedLocalOp)
return 1
}
// the show command expects the config dir to always be the cwd
cwd, err := os.Getwd()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error getting cwd: %s", err))
return 1
}
// Build the operation
opReq := c.Operation(b)
opReq.ConfigDir = cwd
opReq.ConfigLoader, err = c.initConfigLoader()
if err != nil {
diags = diags.Append(err)
c.showDiagnostics(diags)
return 1
}
// Get the context
ctx, _, ctxDiags := local.Context(opReq)
diags = diags.Append(ctxDiags)
if ctxDiags.HasErrors() {
c.showDiagnostics(diags)
return 1
}
schemas := ctx.Schemas()
env := c.Workspace()
var planErr, stateErr error
var path string
var plan *plans.Plan
var state *states.State
if len(args) > 0 {
path = args[0]
pr, err := planfile.Open(path)
if err != nil {
f, err := os.Open(path)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error loading file: %s", err))
return 1
}
defer f.Close()
var stateFile *statefile.File
stateFile, err = statefile.Read(f)
if err != nil {
stateErr = err
} else {
state = stateFile.State
}
} else {
plan, err = pr.ReadPlan()
if err != nil {
planErr = err
}
}
} else {
// Get the state
stateStore, err := b.StateMgr(env)
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
return 1
}
if err := stateStore.RefreshState(); err != nil {
c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
return 1
}
state = stateStore.State()
if state == nil {
c.Ui.Output("No state.")
return 0
}
}
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 {
dispPlan := format.NewPlan(plan.Changes)
c.Ui.Output(dispPlan.Format(c.Colorize()))
return 0
}
c.Ui.Output(format.State(&format.StateOpts{
State: state,
Color: c.Colorize(),
Schemas: schemas,
}))
return 0
}
func (c *ShowCommand) Help() string {
helpText := `
Usage: terraform show [options] [path]
Reads and outputs a Terraform state or plan file in a human-readable
form. If no path is specified, the current state will be shown.
Options:
-no-color If specified, output won't contain any color.
`
return strings.TrimSpace(helpText)
}
func (c *ShowCommand) Synopsis() string {
return "Inspect Terraform state or plan"
}