make emojis cached

crates/treehouse/src/cli/generate.rs

@@ -1,5 +1,3 @@
-mod static_urls;
-
 use std::{
     collections::HashMap,
     ffi::OsStr,
@@ -16,7 +14,6 @@ use copy_dir::copy_dir;
 use handlebars::{handlebars_helper, Handlebars};
 use log::{debug, error, info};
 use serde::Serialize;
-use static_urls::StaticUrls;
 use walkdir::WalkDir;
 
 use crate::{
@@ -29,6 +26,7 @@ use crate::{
         tree::branches_to_html,
     },
     state::Source,
+    static_urls::StaticUrls,
     tree::SemaRoots,
 };
 
@@ -215,7 +213,13 @@ impl Generator {
         parsed_trees: Vec<ParsedTree>,
     ) -> anyhow::Result<()> {
         let mut handlebars = Handlebars::new();
-        let mut config_derived_data = ConfigDerivedData::default();
+        let mut config_derived_data = ConfigDerivedData {
+            image_sizes: Default::default(),
+            static_urls: StaticUrls::new(
+                paths.static_dir.to_owned(),
+                format!("{}/static", config.site),
+            ),
+        };
 
         handlebars_helper!(cat: |a: String, b: String| a + &b);
 

crates/treehouse/src/config.rs

@@ -6,9 +6,12 @@ use log::{debug, error, warn};
 use serde::{Deserialize, Serialize};
 use walkdir::WalkDir;
 
-use crate::html::highlight::{
+use crate::{
+    html::highlight::{
         compiled::{compile_syntax, CompiledSyntax},
         Syntax,
+    },
+    static_urls::StaticUrls,
 };
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
@@ -179,9 +182,9 @@ impl Config {
 }
 
 /// Data derived from the config.
-#[derive(Debug, Clone, Default)]
 pub struct ConfigDerivedData {
     pub image_sizes: HashMap<String, Option<ImageSize>>,
+    pub static_urls: StaticUrls,
 }
 
 /// Image size. This is useful for emitting <img> elements with a specific size to eliminate

crates/treehouse/src/html/markdown.rs

@@ -555,9 +555,12 @@ where
                                 .write_str("<img data-cast=\"emoji\" title=\":")?;
                             escape_html(&mut self.writer, name)?;
                             self.writer.write_str(":\" src=\"")?;
-                            escape_html(&mut self.writer, &self.config.site)?;
-                            self.writer.write_str("/static/emoji/")?;
-                            escape_html(&mut self.writer, filename)?;
+                            let url = self
+                                .config_derived_data
+                                .static_urls
+                                .get(&format!("emoji/{filename}"))
+                                .unwrap_or_default();
+                            escape_html(&mut self.writer, &url)?;
                             self.writer.write_str("\" alt=\"")?;
                             escape_html(&mut self.writer, name)?;
                             if let Some(image_size) = self

crates/treehouse/src/html/tree.rs

@@ -142,6 +142,9 @@ pub fn branch_to_html(
                         "page" => Some((config.page_url(linked).into(), "".into())),
                         "pic" => config.pics.get(linked).map(|filename| {
                             (
+                                // NOTE: We can't generate a URL with a hash here yet, because we
+                                // cannot access ConfigDerivedData here due to it being borrowed
+                                // by the Markdown parser.
                                 format!("{}/static/pic/{}", config.site, &filename).into(),
                                 "".into(),
                             )

crates/treehouse/src/main.rs

@@ -16,6 +16,7 @@ mod fun;
 mod html;
 mod paths;
 mod state;
+mod static_urls;
 mod tree;
 
 async fn fallible_main() -> anyhow::Result<()> {