fix(dates): improve handling of missing dates

Make date handling more consistent such that file dates are optional
everywhere, i.e. dates are not rendered unless the CreatedModifiedDate
plugin sourced the configured date type.

quartz/components/ContentMeta.tsx

@@ -29,8 +29,9 @@ export default ((opts?: Partial<ContentMetaOptions>) => {
     if (text) {
       const segments: (string | JSX.Element)[] = []
 
-      if (fileData.dates) {
-        segments.push(<Date date={getDate(cfg, fileData)!} locale={cfg.locale} />)
+      const date = getDate(cfg, fileData)
+      if (date) {
+        segments.push(<Date date={date} locale={cfg.locale} />)
       }
 
       // Display reading time if enabled

quartz/components/PageList.tsx

@@ -8,13 +8,15 @@ export type SortFn = (f1: QuartzPluginData, f2: QuartzPluginData) => number
 
 export function byDateAndAlphabetical(cfg: GlobalConfiguration): SortFn {
   return (f1, f2) => {
-    if (f1.dates && f2.dates) {
+    const f1Date = getDate(cfg, f1)
+    const f2Date = getDate(cfg, f2)
+    if (f1Date && f2Date) {
       // sort descending
-      return getDate(cfg, f2)!.toMillis() - getDate(cfg, f1)!.toMillis()
-    } else if (f1.dates && !f2.dates) {
+      return f2Date.toMillis() - f1Date.toMillis()
+    } else if (f1Date && !f2Date) {
       // prioritize files with dates
       return -1
-    } else if (!f1.dates && f2.dates) {
+    } else if (!f1Date && f2Date) {
       return 1
     }
 
@@ -32,23 +34,19 @@ type Props = {
 
 export const PageList: QuartzComponent = ({ cfg, fileData, allFiles, limit, sort }: Props) => {
   const sorter = sort ?? byDateAndAlphabetical(cfg)
-  let list = allFiles.sort(sorter)
-  if (limit) {
-    list = list.slice(0, limit)
-  }
+  const list = allFiles.toSorted(sorter).slice(0, limit ?? allFiles.length)
 
   return (
     <ul class="section-ul">
       {list.map((page) => {
         const title = page.frontmatter?.title
         const tags = page.frontmatter?.tags ?? []
+        const date = getDate(cfg, page)
 
         return (
           <li class="section-li">
             <div class="section">
-              <p class="meta">
-                {page.dates && <Date date={getDate(cfg, page)!} locale={cfg.locale} />}
-              </p>
+              <p class="meta">{date && <Date date={date} locale={cfg.locale} />}</p>
               <div class="desc">
                 <h3>
                   <a href={resolveRelative(fileData.slug!, page.slug!)} class="internal">

quartz/components/RecentNotes.tsx

@@ -42,6 +42,7 @@ export default ((userOpts?: Partial<Options>) => {
           {pages.slice(0, opts.limit).map((page) => {
             const title = page.frontmatter?.title ?? i18n(cfg.locale).propertyDefaults.title
             const tags = page.frontmatter?.tags ?? []
+            const date = getDate(cfg, page)
 
             return (
               <li class="recent-li">
@@ -53,11 +54,7 @@ export default ((userOpts?: Partial<Options>) => {
                       </a>
                     </h3>
                   </div>
-                  {page.dates && (
-                    <p class="meta">
-                      <Date date={getDate(cfg, page)!} locale={cfg.locale} />
-                    </p>
-                  )}
+                  <p class="meta">{date && <Date date={date} locale={cfg.locale} />}</p>
                   {opts.showTags && (
                     <ul class="tags">
                       {tags.map((tag) => (

quartz/plugins/transformers/lastmod.ts

@@ -74,7 +74,8 @@ export const CreatedModifiedDate: QuartzTransformerPlugin<Partial<Options>> = (u
             for (const source of opts.priority) {
               if (source === "filesystem") {
                 const st = await fs.promises.stat(fullFp)
-                created ||= DateTime.fromMillis(st.birthtimeMs)
+                // birthtime can be 0 on some filesystems, so default to the earlier of ctime/mtime
+                created ||= DateTime.fromMillis(st.birthtimeMs || Math.min(st.ctimeMs, st.mtimeMs))
                 modified ||= DateTime.fromMillis(st.mtimeMs)
               } else if (source === "frontmatter" && file.data.frontmatter) {
                 created ||= parseDateString(fp, file.data.frontmatter.date, parseOpts)
@@ -106,9 +107,9 @@ export const CreatedModifiedDate: QuartzTransformerPlugin<Partial<Options>> = (u
             }
 
             file.data.dates = {
-              created: created ?? DateTime.now(),
-              modified: modified ?? DateTime.now(),
-              published: published ?? DateTime.now(),
+              created: created,
+              modified: modified,
+              published: published,
             }
           }
         },
@@ -119,10 +120,10 @@ export const CreatedModifiedDate: QuartzTransformerPlugin<Partial<Options>> = (u
 
 declare module "vfile" {
   interface DataMap {
-    dates: {
+    dates: Partial<{
       created: DateTime
       modified: DateTime
       published: DateTime
-    }
+    }>
   }
 }