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/aliases.ts |   71 ++++++++++++++++++-----------------
 1 files changed, 36 insertions(+), 35 deletions(-)

diff --git a/quartz/plugins/emitters/aliases.ts b/quartz/plugins/emitters/aliases.ts
index a16093b..327cde8 100644
--- a/quartz/plugins/emitters/aliases.ts
+++ b/quartz/plugins/emitters/aliases.ts
@@ -1,46 +1,47 @@
-import { FilePath, joinSegments, resolveRelative, simplifySlug } from "../../util/path"
+import { resolveRelative, simplifySlug } from "../../util/path"
 import { QuartzEmitterPlugin } from "../types"
 import { write } from "./helpers"
-import DepGraph from "../../depgraph"
-import { getAliasSlugs } from "../transformers/frontmatter"
+import { BuildCtx } from "../../util/ctx"
+import { VFile } from "vfile"
+
+async function* processFile(ctx: BuildCtx, file: VFile) {
+  const ogSlug = simplifySlug(file.data.slug!)
+
+  for (const slug of file.data.aliases ?? []) {
+    const redirUrl = resolveRelative(slug, file.data.slug!)
+    yield write({
+      ctx,
+      content: `
+        <!DOCTYPE html>
+        <html lang="en-us">
+        <head>
+        <title>${ogSlug}</title>
+        <link rel="canonical" href="${redirUrl}">
+        <meta name="robots" content="noindex">
+        <meta charset="utf-8">
+        <meta http-equiv="refresh" content="0; url=${redirUrl}">
+        </head>
+        </html>
+        `,
+      slug,
+      ext: ".html",
+    })
+  }
+}
 
 export const AliasRedirects: QuartzEmitterPlugin = () => ({
   name: "AliasRedirects",
-  async getDependencyGraph(ctx, content, _resources) {
-    const graph = new DepGraph<FilePath>()
-
-    const { argv } = ctx
+  async *emit(ctx, content) {
     for (const [_tree, file] of content) {
-      for (const slug of getAliasSlugs(file.data.frontmatter?.aliases ?? [], argv, file)) {
-        graph.addEdge(file.data.filePath!, joinSegments(argv.output, slug + ".html") as FilePath)
-      }
+      yield* processFile(ctx, file)
     }
-
-    return graph
   },
-  async *emit(ctx, content, _resources) {
-    for (const [_tree, file] of content) {
-      const ogSlug = simplifySlug(file.data.slug!)
-
-      for (const slug of file.data.aliases ?? []) {
-        const redirUrl = resolveRelative(slug, file.data.slug!)
-        yield write({
-          ctx,
-          content: `
-            <!DOCTYPE html>
-            <html lang="en-us">
-            <head>
-            <title>${ogSlug}</title>
-            <link rel="canonical" href="${redirUrl}">
-            <meta name="robots" content="noindex">
-            <meta charset="utf-8">
-            <meta http-equiv="refresh" content="0; url=${redirUrl}">
-            </head>
-            </html>
-            `,
-          slug,
-          ext: ".html",
-        })
+  async *partialEmit(ctx, _content, _resources, changeEvents) {
+    for (const changeEvent of changeEvents) {
+      if (!changeEvent.file) continue
+      if (changeEvent.type === "add" || changeEvent.type === "change") {
+        // add new ones if this file still exists
+        yield* processFile(ctx, changeEvent.file)
       }
     }
   },

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