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|
goldmark-meta
=========================
[![GoDev][godev-image]][godev-url]
[godev-image]: https://pkg.go.dev/badge/github.com/yuin/goldmark-meta
[godev-url]: https://pkg.go.dev/github.com/yuin/goldmark-meta
goldmark-meta is an extension for the [goldmark](http://github.com/yuin/goldmark)
that allows you to define document metadata in YAML format.
Usage
--------------------
### Installation
```
go get github.com/yuin/goldmark-meta
```
### Markdown syntax
YAML metadata block is a leaf block that can not have any markdown element
as a child.
YAML metadata must start with a **YAML metadata separator**.
This separator must be at first line of the document.
A **YAML metadata separator** is a line that only `-` is repeated.
YAML metadata must end with a **YAML metadata separator**.
You can define objects as a 1st level item. At deeper level, you can define
any kind of YAML element.
Example:
```
---
Title: goldmark-meta
Summary: Add YAML metadata to the document
Tags:
- markdown
- goldmark
---
# Heading 1
```
### Access the metadata
```go
import (
"bytes"
"fmt"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark-meta"
)
func main() {
markdown := goldmark.New(
goldmark.WithExtensions(
meta.Meta,
),
)
source := `---
Title: goldmark-meta
Summary: Add YAML metadata to the document
Tags:
- markdown
- goldmark
---
# Hello goldmark-meta
`
var buf bytes.Buffer
context := parser.NewContext()
if err := markdown.Convert([]byte(source), &buf, parser.WithContext(context)); err != nil {
panic(err)
}
metaData := meta.Get(context)
title := metaData["Title"]
fmt.Print(title)
}
```
Or `WithStoresInDocument` option:
```go
import (
"bytes"
"fmt"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark-meta"
)
func main() {
markdown := goldmark.New(
goldmark.WithExtensions(
meta.New(
meta.WithStoresInDocument(),
),
),
)
source := `---
Title: goldmark-meta
Summary: Add YAML metadata to the document
Tags:
- markdown
- goldmark
---
`
document := markdown.Parser().Parse(text.NewReader([]byte(source)))
metaData := document.OwnerDocument().Meta()
title := metaData["Title"]
fmt.Print(title)
```
### Render the metadata as a table
You need to add `extension.TableHTMLRenderer` or the `Table` extension to
render metadata as a table.
```go
import (
"bytes"
"fmt"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/util"
"github.com/yuin/goldmark-meta"
)
func main() {
markdown := goldmark.New(
goldmark.WithExtensions(
meta.New(meta.WithTable()),
),
goldmark.WithRendererOptions(
renderer.WithNodeRenderers(
util.Prioritized(extension.NewTableHTMLRenderer(), 500),
),
),
)
// OR
// markdown := goldmark.New(
// goldmark.WithExtensions(
// meta.New(meta.WithTable()),
// extension.Table,
// ),
// )
source := `---
Title: goldmark-meta
Summary: Add YAML metadata to the document
Tags:
- markdown
- goldmark
---
# Hello goldmark-meta
`
var buf bytes.Buffer
if err := markdown.Convert([]byte(source), &buf); err != nil {
panic(err)
}
fmt.Print(buf.String())
}
```
License
--------------------
MIT
Author
--------------------
Yusuke Inuzuka
|
