From 7de728fdfec8f28bb5745454677ee7b4c904ee6d Mon Sep 17 00:00:00 2001
From: Rohan Kumar <seirdy@seirdy.one>
Date: Wed, 29 Nov 2023 00:36:14 -0800
Subject: [PATCH] Avoid data races with codeIndex on feeds

---
 layouts/_default/list.atom.xml      |  1 -
 layouts/posts/single.html           |  2 ++
 layouts/shortcodes/codecaption.atom | 17 +++++++++++++++++
 layouts/shortcodes/codecaption.rss  | 17 +++++++++++++++++
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 layouts/shortcodes/codecaption.atom
 create mode 100644 layouts/shortcodes/codecaption.rss

diff --git a/layouts/_default/list.atom.xml b/layouts/_default/list.atom.xml
index e0dcbe4..6586a50 100644
--- a/layouts/_default/list.atom.xml
+++ b/layouts/_default/list.atom.xml
@@ -58,7 +58,6 @@
   {{ range $pages -}}
 	{{- if not .Params.Private -}}
   <entry>
-		{{- .Page.Scratch.Set "codeIndex" 1 -}}
 		<title>{{ .Title }}</title>
 		<link rel="alternate" type="text/html" href="{{ .Permalink }}" />
 		<id>{{ .Permalink }}</id>
diff --git a/layouts/posts/single.html b/layouts/posts/single.html
index 26006da..303f120 100644
--- a/layouts/posts/single.html
+++ b/layouts/posts/single.html
@@ -1,6 +1,8 @@
 {{- define "main" -}}
 {{- $canonicalRelPermalink := .RelPermalink | replaceRE "^/~seirdy/" "/" }}
 {{- .Scratch.Set "codeIndex" 1 -}}
+{{- .Scratch.Set "codeIndexAtom" 1 -}}
+{{- .Scratch.Set "codeIndexRss" 1 -}}
 <main
  itemprop="mainEntity" itemscope="" itemtype="https://schema.org/BlogPosting{{ with .Params.articleType }} https://schema.org/{{ . }}{{ end }}" itemid="{{ .Site.Params.CanonicalBaseURL }}{{ $canonicalRelPermalink }}">
 <link itemprop="isPartOf" href="{{ .Site.Params.CanonicalBaseURL }}/" />
diff --git a/layouts/shortcodes/codecaption.atom b/layouts/shortcodes/codecaption.atom
new file mode 100644
index 0000000..5dac3c7
--- /dev/null
+++ b/layouts/shortcodes/codecaption.atom
@@ -0,0 +1,17 @@
+{{- $codeIndex := (.Page.Scratch.Get "codeIndexAtom") -}}
+{{- $id := (printf `code-%d` $codeIndex) -}}
+{{- with .Get "id" -}}
+	{{- $id = . -}}
+{{- end -}}
+{{ with .Parent }}
+	{{- with .Get "id" -}}
+		{{- $id = . -}}
+	{{- end -}}
+{{- end -}}
+<figcaption id="{{ $id }}-caption">
+	<span id="{{ $id }}" tabindex="-1">
+	<strong itemprop="name"> <span itemprop="codeSampleType">Code snippet</span> {{ $codeIndex }}</strong>{{with .Get "lang"}} (<span itemprop="programmingLanguage">{{ . }}</span>){{ end -}}
+	</span>:
+{{ .Inner | .Page.RenderString | safeHTML }}
+</figcaption>
+{{- .Page.Scratch.Set "codeIndexAtom" (add 1 $codeIndex) -}}
diff --git a/layouts/shortcodes/codecaption.rss b/layouts/shortcodes/codecaption.rss
new file mode 100644
index 0000000..ad31422
--- /dev/null
+++ b/layouts/shortcodes/codecaption.rss
@@ -0,0 +1,17 @@
+{{- $codeIndex := (.Page.Scratch.Get "codeIndexRss") -}}
+{{- $id := (printf `code-%d` $codeIndex) -}}
+{{- with .Get "id" -}}
+	{{- $id = . -}}
+{{- end -}}
+{{ with .Parent }}
+	{{- with .Get "id" -}}
+		{{- $id = . -}}
+	{{- end -}}
+{{- end -}}
+<figcaption id="{{ $id }}-caption">
+	<span id="{{ $id }}" tabindex="-1">
+	<strong itemprop="name"> <span itemprop="codeSampleType">Code snippet</span> {{ $codeIndex }}</strong>{{with .Get "lang"}} (<span itemprop="programmingLanguage">{{ . }}</span>){{ end -}}
+	</span>:
+{{ .Inner | .Page.RenderString | safeHTML }}
+</figcaption>
+{{- .Page.Scratch.Set "codeIndexRss" (add 1 $codeIndex) -}}