common: Remove Template, in packer now

common/template.go

-package common
-
-import (
-	"bytes"
-	"fmt"
-	"strconv"
-	"text/template"
-	"time"
-)
-
-// Template processes string data as a text/template with some common
-// elements and functions available. Plugin creators should process as
-// many fields as possible through this.
-type Template struct {
-	UserVars map[string]string
-
-	root *template.Template
-	i    int
-}
-
-// NewTemplate creates a new template processor.
-func NewTemplate() (*Template, error) {
-	result := &Template{
-		UserVars: make(map[string]string),
-	}
-
-	result.root = template.New("configTemplateRoot")
-	result.root.Funcs(template.FuncMap{
-		"timestamp": templateTimestamp,
-		"user":      result.templateUser,
-	})
-
-	return result, nil
-}
-
-// Process processes a single string, compiling and executing the template.
-func (t *Template) Process(s string, data interface{}) (string, error) {
-	tpl, err := t.root.New(t.nextTemplateName()).Parse(s)
-	if err != nil {
-		return "", err
-	}
-
-	buf := new(bytes.Buffer)
-	if err := tpl.Execute(buf, data); err != nil {
-		return "", err
-	}
-
-	return buf.String(), nil
-}
-
-// Validate the template.
-func (t *Template) Validate(s string) error {
-	root, err := t.root.Clone()
-	if err != nil {
-		return err
-	}
-
-	_, err = root.New("template").Parse(s)
-	return err
-}
-
-func (t *Template) nextTemplateName() string {
-	name := fmt.Sprintf("tpl%d", t.i)
-	t.i++
-	return name
-}
-
-// User is the function exposed as "user" within the templates and
-// looks up user variables.
-func (t *Template) templateUser(n string) (string, error) {
-	result, ok := t.UserVars[n]
-	if !ok {
-		return "", fmt.Errorf("uknown user var: %s", n)
-	}
-
-	return result, nil
-}
-
-func templateTimestamp() string {
-	return strconv.FormatInt(time.Now().UTC().Unix(), 10)
-}

common/template_test.go

-package common
-
-import (
-	"math"
-	"strconv"
-	"testing"
-	"time"
-)
-
-func TestTemplateProcess_timestamp(t *testing.T) {
-	tpl, err := NewTemplate()
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	result, err := tpl.Process(`{{timestamp}}`, nil)
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	val, err := strconv.ParseInt(result, 10, 64)
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	currentTime := time.Now().UTC().Unix()
-	if math.Abs(float64(currentTime-val)) > 10 {
-		t.Fatalf("val: %d (current: %d)", val, currentTime)
-	}
-}
-
-func TestTemplateProcess_user(t *testing.T) {
-	tpl, err := NewTemplate()
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	tpl.UserVars["foo"] = "bar"
-
-	result, err := tpl.Process(`{{user "foo"}}`, nil)
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	if result != "bar" {
-		t.Fatalf("bad: %s", result)
-	}
-}
-
-func TestTemplateValidate(t *testing.T) {
-	tpl, err := NewTemplate()
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	// Valid
-	err = tpl.Validate(`{{user "foo"}}`)
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	// Invalid
-	err = tpl.Validate(`{{idontexist}}`)
-	if err == nil {
-		t.Fatal("should have error")
-	}
-}