add remark-lint-no-thematic-break package

packages/remark-lint-no-thematic-break/fixtures/000.txt

@@ -0,0 +1,9 @@
+ignores an empty document
+
+---
+
+
+---
+
+
+---

packages/remark-lint-no-thematic-break/fixtures/001.txt

@@ -0,0 +1,11 @@
+ignores a document that does not contain thematic breaks
+
+---
+
+# ---
+*a**b***
+
+---
+
+
+---

packages/remark-lint-no-thematic-break/fixtures/002.txt

@@ -0,0 +1,21 @@
+sends a message if a document contains thematic breaks
+
+---
+
+> ---
+- - -
+***
+* * *
+___
+_ _ _
+
+---
+
+1:3-1:6: Thematic breaks are not allowed.
+2:1-2:6: Thematic breaks are not allowed.
+3:1-3:4: Thematic breaks are not allowed.
+4:1-4:6: Thematic breaks are not allowed.
+5:1-5:4: Thematic breaks are not allowed.
+6:1-6:6: Thematic breaks are not allowed.
+
+---

packages/remark-lint-no-thematic-break/lib/main.test.ts

@@ -0,0 +1,47 @@
+import {readFile, readdir} from "node:fs/promises"
+import path from "node:path"
+import remarkLint from "remark-lint"
+import remarkParse from "remark-parse"
+import remarkStringify from "remark-stringify"
+import {unified} from "unified"
+import {test} from "uvu"
+import {equal as eq} from "uvu/assert"
+import {remarkLintNoThematicBreak} from "./main.ts"
+
+for (const [n, v, e] of await list()) {
+  test(n, async () => {
+    const f = await unified()
+      .use(remarkParse)
+      .use(remarkLint)
+      .use(remarkLintNoThematicBreak)
+      .use(remarkStringify)
+      .process(v)
+    const a = f.messages.map(String)
+    eq(a, e)
+  })
+}
+
+test.run()
+
+type TestCase = [string, string, string[]]
+
+async function list(): Promise<TestCase[]> {
+  const a: TestCase[] = []
+  const d = await readdir("fixtures")
+  for (const n of d) {
+    const e = path.extname(n)
+    const p = path.basename(n, e)
+    const s = await readFile(`fixtures/${n}`, "utf8")
+    const c = create(p, s)
+    a.push(c)
+  }
+  return a
+}
+
+function create(p: string, s: string): TestCase {
+  let [n, m, h] = s.split("\n---\n")
+  n = n.slice(0, -1)
+  m = m.slice(1).slice(0, -1)
+  h = h.slice(1).slice(0, -1)
+  return [`${p}: ${n}`, m, h.split("\n").filter((f) => f !== "")]
+}

packages/remark-lint-no-thematic-break/lib/main.ts

@@ -0,0 +1,26 @@
+import {
+  isParentNode,
+  isThematicBreakNode,
+} from "@onlyoffice/mdast-util-is-node"
+import {type RemarkLintRule} from "@onlyoffice/remark-lint"
+import {type Node} from "mdast"
+import {lintRule} from "unified-lint-rule"
+import {type VFile} from "vfile"
+
+export const remarkLintNoThematicBreak: RemarkLintRule<Node> =
+  lintRule("@onlyoffice:no-thematic-break", rule)
+
+function rule(t: Node, f: VFile): void {
+  if (isThematicBreakNode(t)) {
+    f.message("Thematic breaks are not allowed.", {ancestors: [t]})
+    return
+  }
+
+  if (!isParentNode(t)) {
+    return
+  }
+
+  for (const c of t.children) {
+    rule(c, f)
+  }
+}

packages/remark-lint-no-thematic-break/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "@onlyoffice/remark-lint-no-thematic-break",
+  "type": "module",
+  "private": true,
+  "main": "dist/main.js",
+  "scripts": {
+    "build:code": "esbuild lib/* --outdir=dist",
+    "build:types": "tsc --project tsconfig.emit.json",
+    "build": "pnpm build:types && pnpm build:code",
+    "clean": "rimraf dist node_modules",
+    "test:types": "tsc",
+    "test:unit": "c8 --config ../../c8.config.json tsx node_modules/uvu/bin.js lib ^.*\\.test\\.ts$",
+    "test": "pnpm test:types && pnpm test:unit"
+  },
+  "dependencies": {
+    "@onlyoffice/mdast-util-is-node": "workspace:^",
+    "@onlyoffice/remark-lint": "workspace:^",
+    "@types/mdast": "4.0.3",
+    "unified-lint-rule": "3.0.0",
+    "vfile": "6.0.1"
+  },
+  "devDependencies": {
+    "c8": "9.1.0",
+    "esbuild": "0.23.0",
+    "remark-lint": "10.0.0",
+    "remark-parse": "11.0.0",
+    "remark-stringify": "11.0.0",
+    "rimraf": "6.0.1",
+    "tsx": "4.16.5",
+    "typescript": "5.4.5",
+    "unified": "11.0.5",
+    "uvu": "0.5.6"
+  }
+}

packages/remark-lint-no-thematic-break/tsconfig.emit.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.emit.json",
+  "compilerOptions": {
+    "rootDir": "lib",
+    "outDir": "dist"
+  },
+  "include": ["lib"]
+}

packages/remark-lint-no-thematic-break/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "include": ["lib"]
+}