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Content-shipped stylesheet override (site.yaml stylesheet)

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A content repo can now ship a CSS file named in site.yaml's
stylesheet field; portal serves it same-origin at /site/<path> and
leptos_meta appends it after the default stylesheet so content rules
win. Plain repo-relative .css path only, validated on load.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y42TyF8Zu7NGRR2893vNcZ
This commit is contained in:
Bendik Aagaard Lynghaug
2026-09-01 20:12:06 +02:00
co-authored by Claude Fable 5
parent 7fd40aaca9
commit 405bb98185
3 changed files with 26 additions and 2 deletions
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Cargo.lock
Generated
+1 -1
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@@ -2948,7 +2948,7 @@ dependencies = [
[[package]]
name = "portal"
version = "0.3.23"
version = "0.3.24"
dependencies = [
"anyhow",
"arc-swap",
src/app.rs
+13 -1
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@@ -1,5 +1,5 @@
use leptos::prelude::*;
use leptos_meta::{provide_meta_context, HashedStylesheet, Html, MetaTags, Title};
use leptos_meta::{provide_meta_context, HashedStylesheet, Html, MetaTags, Stylesheet, Title};
use leptos_router::{
components::{Route, Router, Routes},
hooks::{use_location, use_navigate, use_query_map},
@@ -79,8 +79,20 @@ pub fn App() -> impl IntoView {
});
provide_context(Lang(lang));
// A content-shipped stylesheet (site.yaml `stylesheet:`) layered
// after the default one - leptos_meta appends it at the MetaTags
// slot, which the shell places after HashedStylesheet, so content
// rules win at equal specificity.
let custom_css = Memo::new(move |_| {
site.get()
.and_then(|r| r.ok())
.and_then(|s| s.stylesheet)
.map(|p| format!("/site/{p}"))
});
view! {
<Html attr:lang=move || lang.get()/>
{move || custom_css.get().map(|href| view! { <Stylesheet id="site-custom" href=href/> })}
<Suspense fallback=|| ()>
{move || {
site.get()
src/content.rs
+12
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@@ -527,6 +527,11 @@ pub struct SiteConfig {
/// `None` means "en"; unknown codes fall back to English per key.
#[serde(default)]
pub lang: Option<String>,
/// A content-repo-relative CSS file (e.g. "custom.css") layered
/// *after* the default stylesheet, so it overrides. Served
/// same-origin at `/site/<path>`; plain path only.
#[serde(default)]
pub stylesheet: Option<String>,
#[serde(default)]
pub hero: HeroConfig,
}
@@ -582,6 +587,13 @@ impl SiteConfig {
}
other => anyhow::bail!("site.yaml: hero.kind {other:?} is not one of plain | module"),
}
if let Some(sheet) = &self.stylesheet {
if !is_safe_site_path(sheet) || !sheet.ends_with(".css") {
anyhow::bail!(
"site.yaml: stylesheet {sheet:?} must be a plain repo-relative .css path"
);
}
}
Ok(())
}
}