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