Initial commit

utils/css_gen/Cargo.toml

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+[package]
+name = "css_gen"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+syntect = "4"

utils/css_gen/src/main.rs

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+use std::env;
+use std::process;
+
+use syntect::highlighting::ThemeSet;
+use syntect::html::{css_for_theme_with_class_style, ClassStyle};
+
+const CLASS_STYLE: ClassStyle = ClassStyle::SpacedPrefixed { prefix: "cb_" };
+
+fn main() {
+    let theme_set = ThemeSet::load_defaults();
+    let theme_name = env::args().nth(1).unwrap_or_else(|| {
+        eprintln!("No theme specified");
+        eprint_available_themes(&theme_set);
+        process::exit(1)
+    });
+    let theme = theme_set.themes.get(&theme_name).unwrap_or_else(|| {
+        eprintln!("Theme not found: {}", theme_name);
+        eprint_available_themes(&theme_set);
+        process::exit(1)
+    });
+    let css = css_for_theme_with_class_style(theme, CLASS_STYLE);
+    println!("{}", css);
+}
+
+fn eprint_available_themes(theme_set: &ThemeSet) {
+    eprintln!("Available themes:");
+    for key in theme_set.themes.keys() {
+        eprintln!("  {}", key);
+    }
+}