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Handle yaml frontmatter (#11016)

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Add goldmark-meta to render yaml frontmatter as a table

Fix #5377

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2020-04-09 11:54:50 +01:00 committed by GitHub
parent c02dee8bc4
commit 0be25e2150
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10 changed files with 422 additions and 0 deletions
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1
go.mod
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@ -106,6 +106,7 @@ require (
github.com/urfave/cli v1.20.0
github.com/yohcop/openid-go v0.0.0-20160914080427-2c050d2dae53
github.com/yuin/goldmark v1.1.25
github.com/yuin/goldmark-meta v0.0.0-20191126180153-f0638e958b60
go.etcd.io/bbolt v1.3.3 // indirect
golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e

3
go.sum
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@ -614,8 +614,11 @@ github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q
github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
github.com/yohcop/openid-go v0.0.0-20160914080427-2c050d2dae53 h1:HsIQ6yAjfjQ3IxPGrTusxp6Qxn92gNVq2x5CbvQvx3w=
github.com/yohcop/openid-go v0.0.0-20160914080427-2c050d2dae53/go.mod h1:f6elajwZV+xceiaqgRL090YzLEDGSbqr3poGL3ZgXYo=
github.com/yuin/goldmark v1.1.7/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.1.25 h1:isv+Q6HQAmmL2Ofcmg8QauBmDPlUUnSoNhEcC940Rds=
github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark-meta v0.0.0-20191126180153-f0638e958b60 h1:gZucqLjL1eDzVWrXj4uiWeMbAopJlBR2mKQAsTGdPwo=
github.com/yuin/goldmark-meta v0.0.0-20191126180153-f0638e958b60/go.mod h1:i9VhcIHN2PxXMbQrKqXNueok6QNONoPjNMoj9MygVL0=
github.com/ziutek/mymysql v1.5.4 h1:GB0qdRGsTwQSBVYuVShFBKaXSnSnYYC2d9knnE1LHFs=
github.com/ziutek/mymysql v1.5.4/go.mod h1:LMSpPZ6DbqWFxNCHW77HeMg9I646SAhApZ/wKdgO/C0=
go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=

2
modules/markup/markdown/markdown.go
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@ -16,6 +16,7 @@ import (
giteautil "code.gitea.io/gitea/modules/util"
"github.com/yuin/goldmark"
meta "github.com/yuin/goldmark-meta"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer"
@ -53,6 +54,7 @@ func RenderRaw(body []byte, urlPrefix string, wikiMarkdown bool) []byte {
extension.Ellipsis: nil,
}),
),
meta.New(meta.WithTable()),
),
goldmark.WithParserOptions(
parser.WithAttribute(),

13
vendor/github.com/yuin/goldmark-meta/.gitignore generated vendored Normal file
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@ -0,0 +1,13 @@
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, build with `go test -c`
*.test
*.pprof
# Output of the go coverage tool, specifically when used with LiteIDE
*.out

21
vendor/github.com/yuin/goldmark-meta/LICENSE generated vendored Normal file
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@ -0,0 +1,21 @@
MIT License
Copyright (c) 2019 Yusuke Inuzuka
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

147
vendor/github.com/yuin/goldmark-meta/README.md generated vendored Normal file
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@ -0,0 +1,147 @@
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)
}
```
### 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

8
vendor/github.com/yuin/goldmark-meta/go.mod generated vendored Normal file
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@ -0,0 +1,8 @@
module github.com/yuin/goldmark-meta
go 1.13
require (
github.com/yuin/goldmark v1.1.7
gopkg.in/yaml.v2 v2.2.2
)

6
vendor/github.com/yuin/goldmark-meta/go.sum generated vendored Normal file
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@ -0,0 +1,6 @@
github.com/yuin/goldmark v1.1.7 h1:XiwWADvxJeIM1JbXqthrEhDc19hTMui+o+QaY1hGXlk=
github.com/yuin/goldmark v1.1.7/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

218
vendor/github.com/yuin/goldmark-meta/meta.go generated vendored Normal file
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@ -0,0 +1,218 @@
// package meta is a extension for the goldmark(http://github.com/yuin/goldmark).
//
// This extension parses YAML metadata blocks and store metadata to a
// parser.Context.
package meta
import (
"bytes"
"fmt"
"github.com/yuin/goldmark"
gast "github.com/yuin/goldmark/ast"
east "github.com/yuin/goldmark/extension/ast"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/text"
"github.com/yuin/goldmark/util"
"gopkg.in/yaml.v2"
)
type data struct {
Map map[string]interface{}
Items yaml.MapSlice
Error error
Node gast.Node
}
var contextKey = parser.NewContextKey()
// Get returns a YAML metadata.
func Get(pc parser.Context) map[string]interface{} {
v := pc.Get(contextKey)
if v == nil {
return nil
}
d := v.(*data)
return d.Map
}
// GetItems returns a YAML metadata.
// GetItems preserves defined key order.
func GetItems(pc parser.Context) yaml.MapSlice {
v := pc.Get(contextKey)
if v == nil {
return nil
}
d := v.(*data)
return d.Items
}
type metaParser struct {
}
var defaultMetaParser = &metaParser{}
// NewParser returns a BlockParser that can parse YAML metadata blocks.
func NewParser() parser.BlockParser {
return defaultMetaParser
}
func isSeparator(line []byte) bool {
line = util.TrimRightSpace(util.TrimLeftSpace(line))
for i := 0; i < len(line); i++ {
if line[i] != '-' {
return false
}
}
return true
}
func (b *metaParser) Trigger() []byte {
return []byte{'-'}
}
func (b *metaParser) Open(parent gast.Node, reader text.Reader, pc parser.Context) (gast.Node, parser.State) {
linenum, _ := reader.Position()
if linenum != 0 {
return nil, parser.NoChildren
}
line, _ := reader.PeekLine()
if isSeparator(line) {
return gast.NewTextBlock(), parser.NoChildren
}
return nil, parser.NoChildren
}
func (b *metaParser) Continue(node gast.Node, reader text.Reader, pc parser.Context) parser.State {
line, segment := reader.PeekLine()
if isSeparator(line) {
reader.Advance(segment.Len())
return parser.Close
}
node.Lines().Append(segment)
return parser.Continue | parser.NoChildren
}
func (b *metaParser) Close(node gast.Node, reader text.Reader, pc parser.Context) {
lines := node.Lines()
var buf bytes.Buffer
for i := 0; i < lines.Len(); i++ {
segment := lines.At(i)
buf.Write(segment.Value(reader.Source()))
}
d := &data{}
d.Node = node
meta := map[string]interface{}{}
if err := yaml.Unmarshal(buf.Bytes(), &meta); err != nil {
d.Error = err
} else {
d.Map = meta
}
metaMapSlice := yaml.MapSlice{}
if err := yaml.Unmarshal(buf.Bytes(), &metaMapSlice); err != nil {
d.Error = err
} else {
d.Items = metaMapSlice
}
pc.Set(contextKey, d)
if d.Error == nil {
node.Parent().RemoveChild(node.Parent(), node)
}
}
func (b *metaParser) CanInterruptParagraph() bool {
return false
}
func (b *metaParser) CanAcceptIndentedLine() bool {
return false
}
type astTransformer struct {
}
var defaultASTTransformer = &astTransformer{}
func (a *astTransformer) Transform(node *gast.Document, reader text.Reader, pc parser.Context) {
dtmp := pc.Get(contextKey)
if dtmp == nil {
return
}
d := dtmp.(*data)
if d.Error != nil {
msg := gast.NewString([]byte(fmt.Sprintf("<!-- %s -->", d.Error)))
msg.SetCode(true)
d.Node.AppendChild(d.Node, msg)
return
}
meta := GetItems(pc)
if meta == nil {
return
}
table := east.NewTable()
alignments := []east.Alignment{}
for range meta {
alignments = append(alignments, east.AlignNone)
}
row := east.NewTableRow(alignments)
for _, item := range meta {
cell := east.NewTableCell()
cell.AppendChild(cell, gast.NewString([]byte(fmt.Sprintf("%v", item.Key))))
row.AppendChild(row, cell)
}
table.AppendChild(table, east.NewTableHeader(row))
row = east.NewTableRow(alignments)
for _, item := range meta {
cell := east.NewTableCell()
cell.AppendChild(cell, gast.NewString([]byte(fmt.Sprintf("%v", item.Value))))
row.AppendChild(row, cell)
}
table.AppendChild(table, row)
node.InsertBefore(node, node.FirstChild(), table)
}
// Option is a functional option type for this extension.
type Option func(*meta)
// WithTable is a functional option that renders a YAML metadata as a table.
func WithTable() Option {
return func(m *meta) {
m.Table = true
}
}
type meta struct {
Table bool
}
// Meta is a extension for the goldmark.
var Meta = &meta{}
// New returns a new Meta extension.
func New(opts ...Option) goldmark.Extender {
e := &meta{}
for _, opt := range opts {
opt(e)
}
return e
}
func (e *meta) Extend(m goldmark.Markdown) {
m.Parser().AddOptions(
parser.WithBlockParsers(
util.Prioritized(NewParser(), 0),
),
)
if e.Table {
m.Parser().AddOptions(
parser.WithASTTransformers(
util.Prioritized(defaultASTTransformer, 0),
),
)
}
}

3
vendor/modules.txt vendored
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@ -654,6 +654,9 @@ github.com/yuin/goldmark/renderer
github.com/yuin/goldmark/renderer/html
github.com/yuin/goldmark/text
github.com/yuin/goldmark/util
# github.com/yuin/goldmark-meta v0.0.0-20191126180153-f0638e958b60
## explicit
github.com/yuin/goldmark-meta
# go.etcd.io/bbolt v1.3.3
## explicit
# go.mongodb.org/mongo-driver v1.1.1