From a7372079817fb1a1e69b2632405d759f9c5e913d Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Sun, 16 Mar 2025 21:17:31 +0000
Subject: [PATCH] perf: incremental rebuild (--fastRebuild v2 but default) (#1841)

---
 quartz/plugins/emitters/assets.ts |   54 +++++++++++++++++++++++++++---------------------------
 1 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/quartz/plugins/emitters/assets.ts b/quartz/plugins/emitters/assets.ts
index 120d168..d0da66a 100644
--- a/quartz/plugins/emitters/assets.ts
+++ b/quartz/plugins/emitters/assets.ts
@@ -3,7 +3,6 @@
 import path from "path"
 import fs from "fs"
 import { glob } from "../../util/glob"
-import DepGraph from "../../depgraph"
 import { Argv } from "../../util/ctx"
 import { QuartzConfig } from "../../cfg"
 
@@ -12,40 +11,41 @@
   return await glob("**", argv.directory, ["**/*.md", ...cfg.configuration.ignorePatterns])
 }
 
+const copyFile = async (argv: Argv, fp: FilePath) => {
+  const src = joinSegments(argv.directory, fp) as FilePath
+
+  const name = slugifyFilePath(fp)
+  const dest = joinSegments(argv.output, name) as FilePath
+
+  // ensure dir exists
+  const dir = path.dirname(dest) as FilePath
+  await fs.promises.mkdir(dir, { recursive: true })
+
+  await fs.promises.copyFile(src, dest)
+  return dest
+}
+
 export const Assets: QuartzEmitterPlugin = () => {
   return {
     name: "Assets",
-    async getDependencyGraph(ctx, _content, _resources) {
-      const { argv, cfg } = ctx
-      const graph = new DepGraph<FilePath>()
-
+    async *emit({ argv, cfg }) {
       const fps = await filesToCopy(argv, cfg)
-
       for (const fp of fps) {
-        const ext = path.extname(fp)
-        const src = joinSegments(argv.directory, fp) as FilePath
-        const name = (slugifyFilePath(fp as FilePath, true) + ext) as FilePath
-
-        const dest = joinSegments(argv.output, name) as FilePath
-
-        graph.addEdge(src, dest)
+        yield copyFile(argv, fp)
       }
-
-      return graph
     },
-    async *emit({ argv, cfg }, _content, _resources) {
-      const assetsPath = argv.output
-      const fps = await filesToCopy(argv, cfg)
-      for (const fp of fps) {
-        const ext = path.extname(fp)
-        const src = joinSegments(argv.directory, fp) as FilePath
-        const name = (slugifyFilePath(fp as FilePath, true) + ext) as FilePath
+    async *partialEmit(ctx, _content, _resources, changeEvents) {
+      for (const changeEvent of changeEvents) {
+        const ext = path.extname(changeEvent.path)
+        if (ext === ".md") continue
 
-        const dest = joinSegments(assetsPath, name) as FilePath
-        const dir = path.dirname(dest) as FilePath
-        await fs.promises.mkdir(dir, { recursive: true }) // ensure dir exists
-        await fs.promises.copyFile(src, dest)
-        yield dest
+        if (changeEvent.type === "add" || changeEvent.type === "change") {
+          yield copyFile(ctx.argv, changeEvent.path)
+        } else if (changeEvent.type === "delete") {
+          const name = slugifyFilePath(changeEvent.path)
+          const dest = joinSegments(ctx.argv.output, name) as FilePath
+          await fs.promises.unlink(dest)
+        }
       }
     },
   }

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