mirror of
https://github.com/gohugoio/hugo.git
synced 2024-05-19 07:42:48 +00:00
90 lines
2.6 KiB
Go
90 lines
2.6 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 pandoc converts content to HTML using Pandoc as an external helper.
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package pandoc
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import (
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"github.com/gohugoio/hugo/common/hexec"
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"github.com/gohugoio/hugo/htesting"
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"github.com/gohugoio/hugo/identity"
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"github.com/gohugoio/hugo/markup/converter"
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"github.com/gohugoio/hugo/markup/internal"
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)
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// Provider is the package entry point.
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var Provider converter.ProviderProvider = provider{}
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type provider struct{}
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func (p provider) New(cfg converter.ProviderConfig) (converter.Provider, error) {
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return converter.NewProvider("pandoc", func(ctx converter.DocumentContext) (converter.Converter, error) {
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return &pandocConverter{
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ctx: ctx,
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cfg: cfg,
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}, nil
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}), nil
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}
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type pandocConverter struct {
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ctx converter.DocumentContext
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cfg converter.ProviderConfig
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}
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func (c *pandocConverter) Convert(ctx converter.RenderContext) (converter.ResultRender, error) {
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b, err := c.getPandocContent(ctx.Src, c.ctx)
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if err != nil {
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return nil, err
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}
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return converter.Bytes(b), nil
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}
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func (c *pandocConverter) Supports(feature identity.Identity) bool {
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return false
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}
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// getPandocContent calls pandoc as an external helper to convert pandoc markdown to HTML.
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func (c *pandocConverter) getPandocContent(src []byte, ctx converter.DocumentContext) ([]byte, error) {
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logger := c.cfg.Logger
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binaryName := getPandocBinaryName()
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if binaryName == "" {
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logger.Println("pandoc not found in $PATH: Please install.\n",
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" Leaving pandoc content unrendered.")
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return src, nil
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}
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args := []string{"--mathjax"}
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return internal.ExternallyRenderContent(c.cfg, ctx, src, binaryName, args)
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}
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const pandocBinary = "pandoc"
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func getPandocBinaryName() string {
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if hexec.InPath(pandocBinary) {
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return pandocBinary
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}
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return ""
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}
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// Supports returns whether Pandoc is installed on this computer.
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func Supports() bool {
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hasBin := getPandocBinaryName() != ""
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if htesting.SupportsAll() {
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if !hasBin {
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panic("pandoc not installed")
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}
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return true
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}
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return hasBin
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}
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