command/diff: use state

This commit is contained in:
Mitchell Hashimoto 2014-06-19 13:51:05 -07:00
parent 344fd805f4
commit 26550b9ddd
3 changed files with 105 additions and 1 deletions

View File

@ -3,6 +3,7 @@ package command
import (
"flag"
"fmt"
"os"
"strings"
"github.com/hashicorp/terraform/config"
@ -18,7 +19,10 @@ type DiffCommand struct {
}
func (c *DiffCommand) Run(args []string) int {
var statePath string
cmdFlags := flag.NewFlagSet("diff", flag.ContinueOnError)
cmdFlags.StringVar(&statePath, "state", "", "path")
cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
@ -33,6 +37,23 @@ func (c *DiffCommand) Run(args []string) int {
return 1
}
// Load up the state
var state *terraform.State
if statePath != "" {
f, err := os.Open(statePath)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error loading state: %s", err))
return 1
}
state, err = terraform.ReadState(f)
f.Close()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error loading state: %s", err))
return 1
}
}
b, err := config.Load(args[0])
if err != nil {
c.Ui.Error(fmt.Sprintf("Error loading blueprint: %s", err))
@ -48,7 +69,7 @@ func (c *DiffCommand) Run(args []string) int {
return 1
}
diff, err := tf.Diff(nil)
diff, err := tf.Diff(state)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error running diff: %s", err))
return 1

80
command/diff_test.go Normal file
View File

@ -0,0 +1,80 @@
package command
import (
"io/ioutil"
"os"
"reflect"
"testing"
"github.com/hashicorp/terraform/terraform"
"github.com/mitchellh/cli"
)
func TestDiff_noState(t *testing.T) {
p := testProvider()
ui := new(cli.MockUi)
c := &DiffCommand{
TFConfig: testTFConfig(p),
Ui: ui,
}
args := []string{
testFixturePath("diff"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
// Verify that the provider was called with the existing state
expectedState := &terraform.ResourceState{
Type: "test_instance",
}
if !reflect.DeepEqual(p.DiffState, expectedState) {
t.Fatalf("bad: %#v", p.DiffState)
}
}
func TestDiff_state(t *testing.T) {
// Write out some prior state
tf, err := ioutil.TempFile("", "tf")
if err != nil {
t.Fatalf("err: %s", err)
}
statePath := tf.Name()
defer os.Remove(tf.Name())
originalState := &terraform.State{
Resources: map[string]*terraform.ResourceState{
"test_instance.foo": &terraform.ResourceState{
ID: "bar",
Type: "test_instance",
},
},
}
err = terraform.WriteState(originalState, tf)
tf.Close()
if err != nil {
t.Fatalf("err: %s", err)
}
p := testProvider()
ui := new(cli.MockUi)
c := &DiffCommand{
TFConfig: testTFConfig(p),
Ui: ui,
}
args := []string{
"-state", statePath,
testFixturePath("diff"),
}
if code := c.Run(args); code != 0 {
t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
}
// Verify that the provider was called with the existing state
expectedState := originalState.Resources["test_instance.foo"]
if !reflect.DeepEqual(p.DiffState, expectedState) {
t.Fatalf("bad: %#v", p.DiffState)
}
}

View File

@ -0,0 +1,3 @@
resource "test_instance" "foo" {
ami = "bar"
}