cleaner config (no error if cache is cleaned

src/main.rs

@@ -27,10 +27,11 @@ use tracing_subscriber::fmt;
 
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
+#[group(required = true, args(&["config", "clear_cache"]))]
 struct Args {
     /// Path to the config of a law text
     #[arg(short, long)]
-    config: String,
+    config: Option<String>,
 
     /// Parses a single paragraph (for debugging, e.g. https://www.ris.bka.gv.at/Dokumente/Bundesnormen/NOR40217849/NOR40217849.xml)
     /// Conflicts with `config` (either parse full law XOR single paragraph)
@@ -41,6 +42,7 @@ struct Args {
     #[arg(long)]
     clear_cache: bool,
 }
+
 use tracing_subscriber::prelude::*;
 fn main() {
     tracing_subscriber::registry()
@@ -53,17 +55,18 @@ fn main() {
         if let Err(e) = clear_cache() {
             println!("Failed to clear cache: {e:?}");
         }
-    }
+    } else {
-
+        let config = &args.config.unwrap(); // ok, checked with clap
         if let Some(par_url) = &args.par_url {
-        let (_, mut builder, parser) = Config::load(&args.config).unwrap();
+            let (_, mut builder, parser) = Config::load(config).unwrap();
             builder.add_classifier(Classifier::new("always-true", Arc::new(always_true)));
             // builder.new_header("initial");
             parser.parse(par_url, &mut builder).unwrap();
             let law: Law = builder.into();
             println!("{law:?}");
         } else {
-        let law = Law::from_config(&args.config).unwrap();
+            let law = Law::from_config(config).unwrap();
             law.to_md();
         }
+    }
 }

src/paragraph/mod.rs

@@ -212,7 +212,7 @@ fn fetch(url: &str) -> Result<String, Error> {
 mod tests {
     use std::fs;
 
-    use crate::config::Config;
+    use crate::{config::Config, overview};
     use pretty_assertions::assert_eq;
 
     #[test]