feat(code): add *code directive

@mizu/code/build.ts

@@ -0,0 +1,37 @@
+// Imports
+import { fromFileUrl, parse } from "@std/path"
+import { Logger } from "@libs/logger"
+import { _code } from "./mod.ts"
+const logger = new Logger().with({ directive: _code.name })
+
+/** List files from github repository. */
+async function tree(repository: string, { branch, path }: { branch: string; path: string }) {
+  const segments = [...path.split("/"), ""]
+  let subtree = { url: `https://api.github.com/repos/${repository}/git/trees/${branch}`, tree: [] as Array<{ path: string; type: string }> }
+  while (segments.length) {
+    const segment = segments.shift()
+    logger.debug(`fetching ${subtree.url}`)
+    const { tree } = await fetch(subtree.url).then((response) => response.json())
+    subtree = segment ? tree.find(({ path }: { path: string }) => path === segment) : { url: subtree.url, tree }
+  }
+  return subtree.tree.filter(({ type }: { type: string }) => type === "blob").map(({ path }: { path: string }) => path)
+}
+
+// Extract supported languages
+const mapping = {} as Record<PropertyKey, string>
+const files = await tree("highlightjs/highlight.js", { branch: "main", path: "src/languages" })
+const { default: hljs } = await import(`${_code.import.highlightjs}/lib/core`)
+logger.info(`found ${files.length} languages`)
+for (const filename of files) {
+  const language = parse(filename).name
+  const log = logger.with({ language }).debug("processing")
+  const { default: syntax } = await import(`${_code.import.highlightjs}/lib/languages/${language}`)
+  hljs.registerLanguage(language, syntax)
+  mapping[language] = language
+  for (const alias of (hljs.getLanguage(language).aliases ?? [])) {
+    mapping[alias] = language
+    log.trace("registered alias", alias)
+  }
+}
+await Deno.writeTextFile(fromFileUrl(import.meta.resolve("./mapping.json")), JSON.stringify(mapping))
+logger.ok("mapping.json generated")

@mizu/code/deno.jsonc

@@ -0,0 +1,14 @@
+{
+  "name": "@mizu/code",
+  "version": "0.1.0",
+  "exports": {
+    ".": "./mod.ts"
+  },
+  "tasks": {
+    // Build the list of mapped languages
+    "build": "deno run --allow-net=api.github.com --allow-write=mapping.json build.ts"
+  },
+  "imports": {
+    "@npm/highlight.js": "npm:highlight.js@11"
+  }
+}