Renamed clap argument to target.

This is more meaningul than "value", at least currently.

src/main.rs

@@ -18,15 +18,15 @@ struct Args {
 
     #[clap()]
     /// numerical value for a region (1-17) or first part of a UK postcode
-    pub value: String,
+    pub target: String,
 }
 
 #[tokio::main]
 async fn main() {
     let args = Args::parse();
 
     // let target: Target = args.value.parse().unwrap_or(Target::NATIONAL);
-    let target: Target = args.value.parse().unwrap();
+    let target: Target = args.target.parse().unwrap();
 
     // look for a range if a date was specified
     if let Some(start_date) = &args.start_date {
@@ -76,21 +76,21 @@ mod tests {
     fn cli_valid_arguments() {
         // single postcode
         let args: Args = parsed_args(vec!["BS7"]).unwrap();
-        assert_eq!(args.value, "BS7");
+        assert_eq!(args.target, "BS7");
 
         // single region id
         parsed_args(vec!["13"]).unwrap();
-        assert_eq!(args.value, "BS7");
+        assert_eq!(args.target, "BS7");
 
         // start date  / postcode
         let args = parsed_args(vec!["--start-date", "2024-05-06", "BS7"]).unwrap();
         assert_eq!(args.start_date, Some("2024-05-06".to_string()));
-        assert_eq!(args.value, "BS7".to_string());
+        assert_eq!(args.target, "BS7".to_string());
 
         // start date / region id
         let args = parsed_args(vec!["--start-date", "2024-05-06", "13"]).unwrap();
         assert_eq!(args.start_date, Some("2024-05-06".to_string()));
-        assert_eq!(args.value, "13".to_string());
+        assert_eq!(args.target, "13".to_string());
 
         // start date / end date
         let args = parsed_args(vec![
@@ -103,7 +103,7 @@ mod tests {
         .unwrap();
         assert_eq!(args.start_date, Some("2024-05-06".to_string()));
         assert_eq!(args.end_date, Some("2024-07-08".to_string()));
-        assert_eq!(args.value, "BS7".to_string());
+        assert_eq!(args.target, "BS7".to_string());
 
         // short names
         parsed_args(vec!["-s 2024-05-06", "-e 2024-05-06", "BS7"]).unwrap();