ref: 0ba19c57f180c33b41c64335ea1d1c89335d34c0
parent: 0afa2897a0cf90f4348929ef432202efddc183a0
author: Bjørn Erik Pedersen <[email protected]>
date: Tue Jul 31 07:35:38 EDT 2018
tpl/partials: Add templates.Exists Fixes #5010
--- /dev/null
+++ b/tpl/templates/init.go
@@ -1,0 +1,44 @@
+// Copyright 2018 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 partials
+
+import (
+ "github.com/gohugoio/hugo/deps"
+ "github.com/gohugoio/hugo/tpl/internal"
+)
+
+const name = "templates"
+
+func init() {+ f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {+ ctx := New(d)
+
+ ns := &internal.TemplateFuncsNamespace{+ Name: name,
+ Context: func(args ...interface{}) interface{} { return ctx },+ }
+
+ ns.AddMethodMapping(ctx.Exists,
+ nil,
+ [][2]string{{`{{ if (templates.Exists "partials/header.html") }}Yes!{{ end }}`, `Yes!`},+ {`{{ if not (templates.Exists "partials/doesnotexist.html") }}No!{{ end }}`, `No!`},+ },
+ )
+
+ return ns
+
+ }
+
+ internal.AddTemplateFuncsNamespace(f)
+}
--- /dev/null
+++ b/tpl/templates/init_test.go
@@ -1,0 +1,38 @@
+// Copyright 2018 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 partials
+
+import (
+ "testing"
+
+ "github.com/gohugoio/hugo/deps"
+ "github.com/gohugoio/hugo/tpl/internal"
+ "github.com/stretchr/testify/require"
+)
+
+func TestInit(t *testing.T) {+ var found bool
+ var ns *internal.TemplateFuncsNamespace
+
+ for _, nsf := range internal.TemplateFuncsNamespaceRegistry {+ ns = nsf(&deps.Deps{})+ if ns.Name == name {+ found = true
+ break
+ }
+ }
+
+ require.True(t, found)
+ require.IsType(t, &Namespace{}, ns.Context())+}
--- /dev/null
+++ b/tpl/templates/templates.go
@@ -1,0 +1,39 @@
+// Copyright 2018 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 partials
+
+import (
+ "github.com/gohugoio/hugo/deps"
+)
+
+// New returns a new instance of the templates-namespaced template functions.
+func New(deps *deps.Deps) *Namespace {+ return &Namespace{+ deps: deps,
+ }
+}
+
+// Namespace provides template functions for the "templates" namespace.
+type Namespace struct {+ deps *deps.Deps
+}
+
+// Exists returns whether the template with the given name exists.
+// Note that this is the Unix-styled relative path including filename suffix,
+// e.g. partials/header.html
+func (ns *Namespace) Exists(name string) bool {+ _, found := ns.deps.Tmpl.Lookup(name)
+ return found
+
+}
--- a/tpl/tplimpl/template_funcs.go
+++ b/tpl/tplimpl/template_funcs.go
@@ -40,6 +40,7 @@
_ "github.com/gohugoio/hugo/tpl/resources"
_ "github.com/gohugoio/hugo/tpl/safe"
_ "github.com/gohugoio/hugo/tpl/strings"
+ _ "github.com/gohugoio/hugo/tpl/templates"
_ "github.com/gohugoio/hugo/tpl/time"
_ "github.com/gohugoio/hugo/tpl/transform"
_ "github.com/gohugoio/hugo/tpl/urls"