terraform: make UX a bit better for input

terraform/context.go

@@ -168,7 +168,7 @@ func (c *Context) Input() error {
 			value, err = c.uiInput.Input(&InputOpts{
 				Id: fmt.Sprintf("var.%s", n),
 				Query: fmt.Sprintf(
-					"Please enter a value for '%s': ", n),
+					"Variable '%s': ", n),
 			})
 			if err != nil {
 				return fmt.Errorf(
@@ -571,8 +571,9 @@ func (c *walkContext) inputWalkFn() depgraph.WalkFunc {
 
 			// Wrap the input into a namespace
 			input := &PrefixUIInput{
-				IdPrefix: fmt.Sprintf("provider.%s", rn.ID),
-				UIInput:  c.Context.uiInput,
+				IdPrefix:    fmt.Sprintf("provider.%s", rn.ID),
+				QueryPrefix: fmt.Sprintf("Provider %s", rn.ID),
+				UIInput:     c.Context.uiInput,
 			}
 
 			// Go through each provider and capture the input necessary

terraform/ui_input_prefix.go

@@ -7,11 +7,13 @@ import (
 // PrefixUIInput is an implementation of UIInput that prefixes the ID
 // with a string, allowing queries to be namespaced.
 type PrefixUIInput struct {
-	IdPrefix string
-	UIInput  UIInput
+	IdPrefix    string
+	QueryPrefix string
+	UIInput     UIInput
 }
 
 func (i *PrefixUIInput) Input(opts *InputOpts) (string, error) {
 	opts.Id = fmt.Sprintf("%s.%s", i.IdPrefix, opts.Id)
+	opts.Query = fmt.Sprintf("%s %s", i.QueryPrefix, opts.Query)
 	return i.UIInput.Input(opts)
 }