diff options
Diffstat (limited to 'markup/pandoc/convert.go')
-rw-r--r-- | markup/pandoc/convert.go | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/markup/pandoc/convert.go b/markup/pandoc/convert.go new file mode 100644 index 000000000..4deab0b46 --- /dev/null +++ b/markup/pandoc/convert.go @@ -0,0 +1,76 @@ +// Copyright 2019 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 pandoc converts content to HTML using Pandoc as an external helper. +package pandoc + +import ( + "os/exec" + + "github.com/gohugoio/hugo/markup/internal" + + "github.com/gohugoio/hugo/markup/converter" +) + +// Provider is the package entry point. +var Provider converter.NewProvider = provider{} + +type provider struct { +} + +func (p provider) New(cfg converter.ProviderConfig) (converter.Provider, error) { + var n converter.NewConverter = func(ctx converter.DocumentContext) (converter.Converter, error) { + return &pandocConverter{ + ctx: ctx, + cfg: cfg, + }, nil + } + return n, nil + +} + +type pandocConverter struct { + ctx converter.DocumentContext + cfg converter.ProviderConfig +} + +func (c *pandocConverter) Convert(ctx converter.RenderContext) (converter.Result, error) { + return converter.Bytes(c.getPandocContent(ctx.Src, c.ctx)), nil +} + +// getPandocContent calls pandoc as an external helper to convert pandoc markdown to HTML. +func (c *pandocConverter) getPandocContent(src []byte, ctx converter.DocumentContext) []byte { + logger := c.cfg.Logger + path := getPandocExecPath() + if path == "" { + logger.ERROR.Println("pandoc not found in $PATH: Please install.\n", + " Leaving pandoc content unrendered.") + return src + } + args := []string{"--mathjax"} + return internal.ExternallyRenderContent(c.cfg, ctx, src, path, args) +} + +func getPandocExecPath() string { + path, err := exec.LookPath("pandoc") + if err != nil { + return "" + } + + return path +} + +// Supports returns whether Pandoc is installed on this computer. +func Supports() bool { + return getPandocExecPath() != "" +} |