Add syntax highlighting for bash.

src/context/src_block.rs

@@ -56,6 +56,13 @@ render!(RenderSrcBlock, ISrcBlock, original, render_context, {
         })
         .collect();
     match original.language.as_ref().map(String::as_str) {
+        Some("bash") => {
+            render_context
+                .dependency_manager
+                .lock()
+                .unwrap()
+                .include_css("language_bash.css")?;
+        }
         Some("nix") => {
             render_context
                 .dependency_manager

src/intermediate/src_block.rs

@@ -80,6 +80,18 @@ intermediate!(
         let language = original.language.map(str::to_owned);
 
         match language.as_ref().map(String::as_str) {
+            Some(lang @ "bash") => {
+                let highlighted = highlight_bash(&lines);
+                if let Ok(highlighted) = highlighted {
+                    return Ok(ISrcBlock {
+                        lines: highlighted,
+                        language,
+                        post_blank: original.get_post_blank(),
+                    });
+                } else {
+                    println!("Warning: Failed to highlight {} source.", lang);
+                }
+            }
             Some(lang @ "nix") => {
                 let highlighted = highlight_nix(&lines);
                 if let Ok(highlighted) = highlighted {
@@ -221,6 +233,19 @@ where
     Ok(highlighted_text)
 }
 
+fn highlight_bash<L>(lines: &[L]) -> Result<Vec<ISrcLine>, CustomError>
+where
+    L: Borrow<str>,
+{
+    let highlight_names = ["comment", "function", "keyword", "property", "string"];
+    let language = tree_sitter_bash::LANGUAGE.into();
+    let mut config =
+        HighlightConfiguration::new(language, "bash", tree_sitter_bash::HIGHLIGHT_QUERY, "", "")
+            .unwrap();
+    config.configure(&highlight_names);
+    highlight_tree_sitter(config, &highlight_names, lines)
+}
+
 fn highlight_nix<L>(lines: &[L]) -> Result<Vec<ISrcLine>, CustomError>
 where
     L: Borrow<str>,