mirror of
https://github.com/gohugoio/hugo.git
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85 lines
2 KiB
Go
85 lines
2 KiB
Go
// Copyright 2019 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package template
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import (
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"io"
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"reflect"
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"github.com/gohugoio/hugo/tpl/internal/go_templates/texttemplate/parse"
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)
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/*
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This files contains the Hugo related addons. All the other files in this
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package is auto generated.
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*/
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// TODO1 name
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type Preparer interface {
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Prepare() (*Template, error)
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}
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type TemplateExecutor struct {
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}
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func (t *TemplateExecutor) Execute(p Preparer, wr io.Writer, data interface{}) error {
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tmpl, err := p.Prepare()
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if err != nil {
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return err
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}
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value, ok := data.(reflect.Value)
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if !ok {
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value = reflect.ValueOf(data)
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}
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state := &state{
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tmpl: tmpl,
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wr: wr,
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vars: []variable{{"$", value}},
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}
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return tmpl.executeWithState(state, value)
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}
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// Prepare returns a template ready for execution.
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func (t *Template) Prepare() (*Template, error) {
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return t, nil
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}
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// Below are modifed structs etc.
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// state represents the state of an execution. It's not part of the
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// template so that multiple executions of the same template
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// can execute in parallel.
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type state struct {
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tmpl *Template
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wr io.Writer
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node parse.Node // current node, for errors
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vars []variable // push-down stack of variable values.
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depth int // the height of the stack of executing templates.
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}
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func (t *Template) executeWithState(state *state, value reflect.Value) (err error) {
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defer errRecover(&err)
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if t.Tree == nil || t.Root == nil {
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state.errorf("%q is an incomplete or empty template", t.Name())
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}
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state.walk(value, t.Root)
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return
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}
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