perf: incremental rebuild (--fastRebuild v2 but default) (#1841)

* checkpoint

* incremental all the things

* properly splice changes array

* smol doc update

* update docs

* make fancy logger dumb in ci

quartz/worker.ts

@@ -1,8 +1,8 @@
 import sourceMapSupport from "source-map-support"
 sourceMapSupport.install(options)
 import cfg from "../quartz.config"
-import { Argv, BuildCtx } from "./util/ctx"
-import { FilePath, FullSlug } from "./util/path"
+import { BuildCtx, WorkerSerializableBuildCtx } from "./util/ctx"
+import { FilePath } from "./util/path"
 import {
   createFileParser,
   createHtmlProcessor,
@@ -14,35 +14,24 @@ import { MarkdownContent, ProcessedContent } from "./plugins/vfile"
 
 // only called from worker thread
 export async function parseMarkdown(
-  buildId: string,
-  argv: Argv,
+  partialCtx: WorkerSerializableBuildCtx,
   fps: FilePath[],
-): Promise<[MarkdownContent[], FullSlug[]]> {
-  // this is a hack
-  // we assume markdown parsers can add to `allSlugs`,
-  // but don't actually use them
-  const allSlugs: FullSlug[] = []
+): Promise<MarkdownContent[]> {
   const ctx: BuildCtx = {
-    buildId,
+    ...partialCtx,
     cfg,
-    argv,
-    allSlugs,
   }
-  return [await createFileParser(ctx, fps)(createMdProcessor(ctx)), allSlugs]
+  return await createFileParser(ctx, fps)(createMdProcessor(ctx))
 }
 
 // only called from worker thread
 export function processHtml(
-  buildId: string,
-  argv: Argv,
+  partialCtx: WorkerSerializableBuildCtx,
   mds: MarkdownContent[],
-  allSlugs: FullSlug[],
 ): Promise<ProcessedContent[]> {
   const ctx: BuildCtx = {
-    buildId,
+    ...partialCtx,
     cfg,
-    argv,
-    allSlugs,
   }
   return createMarkdownParser(ctx, mds)(createHtmlProcessor(ctx))
 }