chore(build): separate markdown and html handling into two separate stages (#1675)

quartz/worker.ts

@@ -3,23 +3,46 @@ sourceMapSupport.install(options)
 import cfg from "../quartz.config"
 import { Argv, BuildCtx } from "./util/ctx"
 import { FilePath, FullSlug } from "./util/path"
-import { createFileParser, createProcessor } from "./processors/parse"
+import {
+  createFileParser,
+  createHtmlProcessor,
+  createMarkdownParser,
+  createMdProcessor,
+} from "./processors/parse"
 import { options } from "./util/sourcemap"
+import { MarkdownContent, ProcessedContent } from "./plugins/vfile"
 
 // only called from worker thread
-export async function parseFiles(
+export async function parseMarkdown(
   buildId: string,
   argv: Argv,
   fps: FilePath[],
-  allSlugs: FullSlug[],
-) {
+): Promise<[MarkdownContent[], FullSlug[]]> {
+  // this is a hack
+  // we assume markdown parsers can add to `allSlugs`,
+  // but don't actually use them
+  const allSlugs: FullSlug[] = []
   const ctx: BuildCtx = {
     buildId,
     cfg,
     argv,
     allSlugs,
   }
-  const processor = createProcessor(ctx)
-  const parse = createFileParser(ctx, fps)
-  return parse(processor)
+  return [await createFileParser(ctx, fps)(createMdProcessor(ctx)), allSlugs]
+}
+
+// only called from worker thread
+export function processHtml(
+  buildId: string,
+  argv: Argv,
+  mds: MarkdownContent[],
+  allSlugs: FullSlug[],
+): Promise<ProcessedContent[]> {
+  const ctx: BuildCtx = {
+    buildId,
+    cfg,
+    argv,
+    allSlugs,
+  }
+  return createMarkdownParser(ctx, mds)(createHtmlProcessor(ctx))
 }