tpl/transform: Make it a package that stands on its own

See #3042

tpl/tplimpl/templateFuncster.go

@@ -21,7 +21,6 @@ import (
 
 	bp "github.com/spf13/hugo/bufferpool"
 	"github.com/spf13/hugo/deps"
-	"github.com/spf13/hugo/tpl/transform"
 	"github.com/spf13/hugo/tpl/urls"
 )
 
@@ -31,8 +30,7 @@ type templateFuncster struct {
 	cachedPartials partialCache
 
 	// Namespaces
-	transform *transform.Namespace
-	urls      *urls.Namespace
+	urls *urls.Namespace
 
 	*deps.Deps
 }
@@ -43,8 +41,7 @@ func newTemplateFuncster(deps *deps.Deps) *templateFuncster {
 		cachedPartials: partialCache{p: make(map[string]interface{})},
 
 		// Namespaces
-		transform: transform.New(deps),
-		urls:      urls.New(deps),
+		urls: urls.New(deps),
 	}
 }
 

tpl/tplimpl/template_funcs.go

@@ -37,6 +37,7 @@ import (
 	_ "github.com/spf13/hugo/tpl/safe"
 	_ "github.com/spf13/hugo/tpl/strings"
 	_ "github.com/spf13/hugo/tpl/time"
+	_ "github.com/spf13/hugo/tpl/transform"
 )
 
 // Get retrieves partial output from the cache based upon the partial name.
@@ -91,20 +92,13 @@ func (t *templateFuncster) initFuncMap() {
 	funcMap := template.FuncMap{
 		// Namespaces
 		//"time":        t.time.Namespace,
-		"transform": t.transform.Namespace,
-		"urls":      t.urls.Namespace,
+		"urls": t.urls.Namespace,
 
 		"absURL":        t.urls.AbsURL,
 		"absLangURL":    t.urls.AbsLangURL,
-		"emojify":       t.transform.Emojify,
-		"highlight":     t.transform.Highlight,
-		"htmlEscape":    t.transform.HTMLEscape,
-		"htmlUnescape":  t.transform.HTMLUnescape,
 		"int":           func(v interface{}) (int, error) { return cast.ToIntE(v) },
-		"markdownify":   t.transform.Markdownify,
 		"partial":       t.partial,
 		"partialCached": t.partialCached,
-		"plainify":      t.transform.Plainify,
 		"print":         fmt.Sprint,
 		"printf":        fmt.Sprintf,
 		"println":       fmt.Sprintln,

tpl/tplimpl/template_funcs_test.go

@@ -128,7 +128,6 @@ absURL: {{ "mystyle.css" | absURL }}
 absURL: {{ 42 | absURL }}
 crypto.MD5: {{ crypto.MD5 "Hello world, gophers!" }}
 dateFormat: {{ dateFormat "Monday, Jan 2, 2006" "2015-01-21" }}
-emojify: {{ "I :heart: Hugo" | emojify }}
 htmlEscape 1: {{ htmlEscape "Cathal Garvey & The Sunshine Band <cathal@foo.bar>" | safeHTML}}
 htmlEscape 2: {{ htmlEscape "Cathal Garvey & The Sunshine Band <cathal@foo.bar>"}}
 htmlUnescape 1: {{htmlUnescape "Cathal Garvey &amp; The Sunshine Band &lt;cathal@foo.bar&gt;" | safeHTML}}
@@ -136,11 +135,9 @@ htmlUnescape 2: {{"Cathal Garvey &amp;amp; The Sunshine Band &amp;lt;cathal@foo.
 htmlUnescape 3: {{"Cathal Garvey &amp;amp; The Sunshine Band &amp;lt;cathal@foo.bar&amp;gt;" | htmlUnescape | htmlUnescape }}
 htmlUnescape 4: {{ htmlEscape "Cathal Garvey & The Sunshine Band <cathal@foo.bar>" | htmlUnescape | safeHTML }}
 htmlUnescape 5: {{ htmlUnescape "Cathal Garvey &amp; The Sunshine Band &lt;cathal@foo.bar&gt;" | htmlEscape | safeHTML }}
-markdownify: {{ .Title | markdownify}}
 print: {{ print "works!" }}
 printf: {{ printf "%s!" "works" }}
 println: {{ println "works!" -}}
-plainify: {{ plainify  "Hello <strong>world</strong>, gophers!" }}
 relLangURL: {{ "index.html" | relLangURL }}
 relURL 1: {{ "http://gohugo.io/" | relURL }}
 relURL 2: {{ "mystyle.css" | relURL }}
@@ -155,7 +152,6 @@ absURL: http://mysite.com/hugo/mystyle.css
 absURL: http://mysite.com/hugo/42
 crypto.MD5: b3029f756f98f79e7f1b7f1d1f0dd53b
 dateFormat: Wednesday, Jan 21, 2015
-emojify: I ❤️ Hugo
 htmlEscape 1: Cathal Garvey &amp; The Sunshine Band &lt;cathal@foo.bar&gt;
 htmlEscape 2: Cathal Garvey &amp;amp; The Sunshine Band &amp;lt;cathal@foo.bar&amp;gt;
 htmlUnescape 1: Cathal Garvey & The Sunshine Band <cathal@foo.bar>
@@ -163,11 +159,9 @@ htmlUnescape 2: Cathal Garvey & The Sunshine Band <cathal@foo.bar>
 htmlUnescape 3: Cathal Garvey &amp; The Sunshine Band &lt;cathal@foo.bar&gt;
 htmlUnescape 4: Cathal Garvey & The Sunshine Band <cathal@foo.bar>
 htmlUnescape 5: Cathal Garvey &amp; The Sunshine Band &lt;cathal@foo.bar&gt;
-markdownify: <strong>BatMan</strong>
 print: works!
 printf: works!
 println: works!
-plainify: Hello world, gophers!
 relLangURL: /hugo/en/index.html
 relURL 1: http://gohugo.io/
 relURL 2: /hugo/mystyle.css

tpl/transform/init.go

@@ -0,0 +1,50 @@
+// Copyright 2017 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package transform
+
+import (
+	"github.com/spf13/hugo/deps"
+	"github.com/spf13/hugo/tpl/internal"
+)
+
+const name = "transform"
+
+func init() {
+	f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {
+		ctx := New(d)
+
+		examples := [][2]string{
+			{`{{ "I :heart: Hugo" | emojify }}`, `I ❤️ Hugo`},
+			{`{{ .Title | markdownify}}`, `<strong>BatMan</strong>`},
+			{`{{ plainify  "Hello <strong>world</strong>, gophers!" }}`, `Hello world, gophers!`},
+		}
+
+		return &internal.TemplateFuncsNamespace{
+			Name:    name,
+			Context: func() interface{} { return ctx },
+			Aliases: map[string]interface{}{
+				"emojify":      ctx.Emojify,
+				"highlight":    ctx.Highlight,
+				"htmlEscape":   ctx.HTMLEscape,
+				"htmlUnescape": ctx.HTMLUnescape,
+				"markdownify":  ctx.Markdownify,
+				"plainify":     ctx.Plainify,
+			},
+			Examples: examples,
+		}
+
+	}
+
+	internal.AddTemplateFuncsNamespace(f)
+}