bump to v4

quartz/plugins/transformers/frontmatter.ts

@@ -4,15 +4,18 @@ import { QuartzTransformerPlugin } from "../types"
 import yaml from "js-yaml"
 import toml from "toml"
 import { slugTag } from "../../util/path"
+import { QuartzPluginData } from "../vfile"
 
 export interface Options {
   delims: string | string[]
   language: "yaml" | "toml"
+  oneLineTagDelim: string
 }
 
 const defaultOptions: Options = {
   delims: "---",
   language: "yaml",
+  oneLineTagDelim: ",",
 }
 
 export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined> = (userOpts) => {
@@ -20,11 +23,13 @@ export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined>
   return {
     name: "FrontMatter",
     markdownPlugins() {
+      const { oneLineTagDelim } = opts
+
       return [
         [remarkFrontmatter, ["yaml", "toml"]],
         () => {
           return (_, file) => {
-            const { data } = matter(file.value, {
+            const { data } = matter(Buffer.from(file.value), {
               ...opts,
               engines: {
                 yaml: (s) => yaml.load(s, { schema: yaml.JSON_SCHEMA }) as object,
@@ -40,24 +45,30 @@ export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined>
             // coerce title to string
             if (data.title) {
               data.title = data.title.toString()
+            } else if (data.title === null || data.title === undefined) {
+              data.title = file.stem ?? "Untitled"
             }
 
-            if (data.tags && !Array.isArray(data.tags)) {
+            if (data.tags) {
+              // coerce to array
+              if (!Array.isArray(data.tags)) {
+                data.tags = data.tags
+                  .toString()
+                  .split(oneLineTagDelim)
+                  .map((tag: string) => tag.trim())
+              }
+
+              // remove all non-string tags
               data.tags = data.tags
-                .toString()
-                .split(",")
-                .map((tag: string) => tag.trim())
+                .filter((tag: unknown) => typeof tag === "string" || typeof tag === "number")
+                .map((tag: string | number) => tag.toString())
             }
 
             // slug them all!!
-            data.tags = [...new Set(data.tags?.map((tag: string) => slugTag(tag)))] ?? []
+            data.tags = [...new Set(data.tags?.map((tag: string) => slugTag(tag)))]
 
             // fill in frontmatter
-            file.data.frontmatter = {
-              title: file.stem ?? "Untitled",
-              tags: [],
-              ...data,
-            }
+            file.data.frontmatter = data as QuartzPluginData["frontmatter"]
           }
         },
       ]