From e82ba97a396e4e9d77486b48e6ee8b1dfd1c1b4c Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Mon, 24 Jul 2023 07:07:58 +0000
Subject: [PATCH] actually add processed tag to frontmatter

---
 quartz/plugins/transformers/frontmatter.ts |   41 ++++++++++++++++++++++++++++++-----------
 1 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/quartz/plugins/transformers/frontmatter.ts b/quartz/plugins/transformers/frontmatter.ts
index 5568463..29b0b4b 100644
--- a/quartz/plugins/transformers/frontmatter.ts
+++ b/quartz/plugins/transformers/frontmatter.ts
@@ -1,15 +1,17 @@
 import matter from "gray-matter"
-import remarkFrontmatter from 'remark-frontmatter'
+import remarkFrontmatter from "remark-frontmatter"
 import { QuartzTransformerPlugin } from "../types"
+import yaml from "js-yaml"
+import { slug as slugAnchor } from "github-slugger"
 
 export interface Options {
-  language: 'yaml' | 'toml',
+  language: "yaml" | "toml"
   delims: string | string[]
 }
 
 const defaultOptions: Options = {
-  language: 'yaml',
-  delims: '---'
+  language: "yaml",
+  delims: "---",
 }
 
 export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined> = (userOpts) => {
@@ -21,25 +23,42 @@
         remarkFrontmatter,
         () => {
           return (_, file) => {
-            const { data } = matter(file.value, opts)
+            const { data } = matter(file.value, {
+              ...opts,
+              engines: {
+                yaml: (s) => yaml.load(s, { schema: yaml.JSON_SCHEMA }) as object,
+              },
+            })
+
+            // tag is an alias for tags
+            if (data.tag) {
+              data.tags = data.tag
+            }
+
+            if (data.tags && !Array.isArray(data.tags)) {
+              data.tags = data.tags
+                .toString()
+                .split(",")
+                .map((tag: string) => tag.trim())
+            }
+
+            // slug them all!!
+            data.tags = data.tags?.map((tag: string) => slugAnchor(tag)) ?? []
 
             // fill in frontmatter
             file.data.frontmatter = {
               title: file.stem ?? "Untitled",
               tags: [],
-              ...data
+              ...data,
             }
           }
-        }
+        },
       ]
     },
-    htmlPlugins() {
-      return []
-    }
   }
 }
 
-declare module 'vfile' {
+declare module "vfile" {
   interface DataMap {
     frontmatter: { [key: string]: any } & {
       title: string

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