From 823d9529224d70056be9dbac29dbbc66f75ae5e8 Mon Sep 17 00:00:00 2001
From: kabirgh <15871468+kabirgh@users.noreply.github.com>
Date: Fri, 16 Feb 2024 00:50:48 +0000
Subject: [PATCH] feat: implement getDependencyGraph for AliasRedirects emitter (#860)

---
 quartz/plugins/emitters/aliases.ts |   27 ++++++++++++++++++++++++---
 1 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/quartz/plugins/emitters/aliases.ts b/quartz/plugins/emitters/aliases.ts
index fb25a44..af3578e 100644
--- a/quartz/plugins/emitters/aliases.ts
+++ b/quartz/plugins/emitters/aliases.ts
@@ -9,9 +9,30 @@
   getQuartzComponents() {
     return []
   },
-  async getDependencyGraph(_ctx, _content, _resources) {
-    // TODO implement
-    return new DepGraph<FilePath>()
+  async getDependencyGraph(ctx, content, _resources) {
+    const graph = new DepGraph<FilePath>()
+
+    const { argv } = ctx
+    for (const [_tree, file] of content) {
+      const dir = path.posix.relative(argv.directory, path.dirname(file.data.filePath!))
+      const aliases = file.data.frontmatter?.aliases ?? []
+      const slugs = aliases.map((alias) => path.posix.join(dir, alias) as FullSlug)
+      const permalink = file.data.frontmatter?.permalink
+      if (typeof permalink === "string") {
+        slugs.push(permalink as FullSlug)
+      }
+
+      for (let slug of slugs) {
+        // fix any slugs that have trailing slash
+        if (slug.endsWith("/")) {
+          slug = joinSegments(slug, "index") as FullSlug
+        }
+
+        graph.addEdge(file.data.filePath!, joinSegments(argv.output, slug + ".html") as FilePath)
+      }
+    }
+
+    return graph
   },
   async emit(ctx, content, _resources): Promise<FilePath[]> {
     const { argv } = ctx

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