[CHORE] Remove github.com/yuin/goldmark-meta

- Remove a unused dependency. This dependency was added to handle YAML
'frontmatter' meta, parsing them and converting them to a table or
details in the resulting HTML. As can be read in the issue that reported
the behavior of YAML frontmatter being rendered literally,
https://github.com/go-gitea/gitea/issues/5377.
- It's an unused dependency as the codebase since then moved on to do this YAML
parsing and rendering on their own, this was implemented in
812cfd0ad9.
- Adds unit tests that was related to this functionality, to proof the
codebase already handles this and to prevent regressions.

go.mod

@@ -103,7 +103,6 @@ require (
 	github.com/yohcop/openid-go v1.0.1
 	github.com/yuin/goldmark v1.7.4
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
-	github.com/yuin/goldmark-meta v1.1.0
 	go.uber.org/mock v0.4.0
 	golang.org/x/crypto v0.24.0
 	golang.org/x/image v0.18.0

go.sum

@@ -746,8 +746,6 @@ github.com/yuin/goldmark v1.7.4 h1:BDXOHExt+A7gwPCJgPIIq7ENvceR7we7rOS9TNoLZeg=
 github.com/yuin/goldmark v1.7.4/go.mod h1:uzxRWxtg69N339t3louHJ7+O03ezfj6PlliRlaOzY1E=
 github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc h1:+IAOyRda+RLrxa1WC7umKOZRsGq4QrFFMYApOeHzQwQ=
 github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc/go.mod h1:ovIvrum6DQJA4QsJSovrkC4saKHQVs7TvcaeO8AIl5I=
-github.com/yuin/goldmark-meta v1.1.0 h1:pWw+JLHGZe8Rk0EGsMVssiNb/AaPMHfSRszZeUeiOUc=
-github.com/yuin/goldmark-meta v1.1.0/go.mod h1:U4spWENafuA7Zyg+Lj5RqK/MF+ovMYtBvXi1lBb2VP0=
 github.com/zeebo/assert v1.1.0 h1:hU1L1vLTHsnO8x8c9KAR5GmM5QscxHg5RNU5z5qbUWY=
 github.com/zeebo/assert v1.1.0/go.mod h1:Pq9JiuJQpG8JLJdtkwrJESF0Foym2/D9XMU5ciN/wJ0=
 github.com/zeebo/blake3 v0.2.3 h1:TFoLXsjeXqRNFxSbk35Dk4YtszE/MQQGK10BH4ptoTg=

modules/markup/markdown/markdown.go

@@ -22,7 +22,6 @@ import (
 	chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
 	"github.com/yuin/goldmark"
 	highlighting "github.com/yuin/goldmark-highlighting/v2"
-	meta "github.com/yuin/goldmark-meta"
 	"github.com/yuin/goldmark/extension"
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/renderer"
@@ -121,7 +120,6 @@ func SpecializedMarkdown() goldmark.Markdown {
 				math.NewExtension(
 					math.Enabled(setting.Markdown.EnableMath),
 				),
-				meta.Meta,
 			),
 			goldmark.WithParserOptions(
 				parser.WithAttribute(),
@@ -182,7 +180,7 @@ func actualRender(ctx *markup.RenderContext, input io.Reader, output io.Writer)
 	bufWithMetadataLength := len(buf)
 
 	rc := &RenderConfig{
-		Meta: renderMetaModeFromString(string(ctx.RenderMetaAs)),
+		Meta: markup.RenderMetaAsDetails,
 		Icon: "table",
 		Lang: "",
 	}

modules/markup/markdown/markdown_test.go

@@ -1210,3 +1210,127 @@ func TestCustomMarkdownURL(t *testing.T) {
 	test("[test](abp)",
 		`<p><a href="http://localhost:3000/gogits/gogs/src/branch/main/abp" rel="nofollow">test</a></p>`)
 }
+
+func TestYAMLMeta(t *testing.T) {
+	setting.AppURL = AppURL
+
+	test := func(input, expected string) {
+		buffer, err := markdown.RenderString(&markup.RenderContext{
+			Ctx: git.DefaultContext,
+		}, input)
+		assert.NoError(t, err)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
+	}
+
+	test(`---
+include_toc: true
+---
+## Header`,
+		`<details><summary><i class="icon table"></i></summary><table>
+<thead>
+<tr>
+<th>include_toc</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>true</td>
+</tr>
+</tbody>
+</table>
+</details><details><summary>toc</summary><ul>
+<li>
+<a href="#user-content-header" rel="nofollow">Header</a></li>
+</ul>
+</details><h2 id="user-content-header">Header</h2>`)
+
+	test(`---
+key: value
+---`,
+		`<details><summary><i class="icon table"></i></summary><table>
+<thead>
+<tr>
+<th>key</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>value</td>
+</tr>
+</tbody>
+</table>
+</details>`)
+
+	test("---\n---\n",
+		`<hr/>
+<hr/>`)
+
+	test(`---
+gitea:
+  details_icon: smiley
+  include_toc: true
+---
+# Another header`,
+		`<details><summary><i class="icon smiley"></i></summary><table>
+<thead>
+<tr>
+<th>gitea</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><table>
+<thead>
+<tr>
+<th>details_icon</th>
+<th>include_toc</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>smiley</td>
+<td>true</td>
+</tr>
+</tbody>
+</table>
+</td>
+</tr>
+</tbody>
+</table>
+</details><details><summary>toc</summary><ul>
+<li>
+<a href="#user-content-another-header" rel="nofollow">Another header</a></li>
+</ul>
+</details><h1 id="user-content-another-header">Another header</h1>`)
+
+	test(`---
+gitea:
+  meta: table
+key: value
+---`, `<table>
+<thead>
+<tr>
+<th>gitea</th>
+<th>key</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><table>
+<thead>
+<tr>
+<th>meta</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>table</td>
+</tr>
+</tbody>
+</table>
+</td>
+<td>value</td>
+</tr>
+</tbody>
+</table>`)
+}

modules/markup/renderer.go

@@ -78,7 +78,6 @@ type RenderContext struct {
 	ShaExistCache    map[string]bool
 	cancelFn         func()
 	SidebarTocNode   ast.Node
-	RenderMetaAs     RenderMetaMode
 	InStandalonePage bool // used by external render. the router "/org/repo/render/..." will output the rendered content in a standalone page
 }