docs: add tags package to generate tags (#10666)

* initial changes

* finalize implementation

* run generator on prep

* remove tags package from book

* optimization attempt

* test transpile

* test transpile

* rename utils

* rename directory

* add vercel ignore

* add tags to book

www/packages/docs-utils/src/find-title.ts

@@ -0,0 +1,23 @@
+import { readFileSync } from "fs"
+
+const REGEX = /export const metadata = {[\s\S]*title: `(?<title>.*)`/
+
+export function findMetadataTitle(content: string): string | undefined {
+  const headingMatch = REGEX.exec(content)
+
+  return headingMatch?.groups?.title
+}
+
+const HEADING_REGEX = /# (?<title>.*)/
+
+export function findPageHeading(content: string): string | undefined {
+  const headingMatch = HEADING_REGEX.exec(content)
+
+  return headingMatch?.groups?.title
+}
+
+export function findPageTitle(filePath: string): string | undefined {
+  const content = readFileSync(filePath, "utf-8")
+
+  return findMetadataTitle(content) || findPageHeading(content)
+}

www/packages/docs-utils/src/get-file-slug.ts

@@ -0,0 +1,23 @@
+import { matter } from "vfile-matter"
+import { readSync } from "to-vfile"
+import { FrontMatter } from "types"
+import { getFrontMatter } from "./get-front-matter.js"
+
+export async function getFileSlug(
+  filePath: string
+): Promise<string | undefined> {
+  const fileFrontmatter = await getFrontMatter(filePath)
+
+  if (fileFrontmatter.slug) {
+    // add to slugs array
+    return fileFrontmatter.slug
+  }
+}
+
+export function getFileSlugSync(filePath: string): string | undefined {
+  const content = readSync(filePath)
+
+  matter(content)
+
+  return ((content.data.matter as FrontMatter).slug as string) || undefined
+}

www/packages/docs-utils/src/get-front-matter.ts

@@ -0,0 +1,30 @@
+import remarkFrontmatter from "remark-frontmatter"
+import remarkParse from "remark-parse"
+import remarkStringify from "remark-stringify"
+import { unified } from "unified"
+import { read, readSync } from "to-vfile"
+import { matter } from "vfile-matter"
+import { FrontMatter } from "types"
+
+export async function getFrontMatter(filePath: string): Promise<FrontMatter> {
+  return (
+    await unified()
+      .use(remarkParse)
+      .use(remarkStringify)
+      .use(remarkFrontmatter, ["yaml"])
+      .use(() => {
+        return (tree, file) => {
+          matter(file)
+        }
+      })
+      .process(await read(filePath))
+  ).data.matter as FrontMatter
+}
+
+export function getFrontMatterSync(filePath: string): FrontMatter {
+  const content = readSync(filePath)
+
+  matter(content)
+
+  return content.data.matter as FrontMatter
+}

www/packages/docs-utils/src/index.ts

@@ -0,0 +1,3 @@
+export * from "./find-title.js"
+export * from "./get-file-slug.js"
+export * from "./get-front-matter.js"