command/apply: if with plan, don't ask for input [GH-346]

command/apply.go

@@ -132,11 +132,13 @@ func (c *ApplyCommand) Run(args []string) int {
 			}
 		}
 
+		if !planned {
 			if err := ctx.Input(); err != nil {
 				c.Ui.Error(fmt.Sprintf("Error configuring: %s", err))
 				return 1
 			}
 		}
+	}
 	if !validateContext(ctx, c.Ui) {
 		return 1
 	}

command/apply_test.go

@@ -1,6 +1,7 @@
 package command
 
 import (
+	"bytes"
 	"fmt"
 	"io/ioutil"
 	"net"
@@ -314,6 +315,14 @@ func TestApply_noArgs(t *testing.T) {
 }
 
 func TestApply_plan(t *testing.T) {
+	// Disable test mode so input would be asked
+	test = false
+	defer func() { test = true }()
+
+	// Set some default reader/writers for the inputs
+	defaultInputReader = new(bytes.Buffer)
+	defaultInputWriter = new(bytes.Buffer)
+
 	planPath := testPlanFile(t, &terraform.Plan{
 		Module: testModule(t, "apply"),
 	})
@@ -336,6 +345,10 @@ func TestApply_plan(t *testing.T) {
 		t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
 	}
 
+	if p.InputCalled {
+		t.Fatalf("input should not be called for plans")
+	}
+
 	if _, err := os.Stat(statePath); err != nil {
 		t.Fatalf("err: %s", err)
 	}