Finish the argument parsing

tools/src/main.rs

@@ -4,6 +4,12 @@ use clap::Command;
 mod publish;
 mod release;
 
+#[derive(Debug)]
+pub enum Error {
+    PublishError(publish::Error),
+    ReleaseError(release::Error),
+}
+
 fn cli() -> Command {
     Command::new("Agb tools")
         .subcommand_required(true)
@@ -16,8 +22,14 @@ fn main() {
     let matches = cli().get_matches();
 
     let result = match matches.subcommand() {
-        Some(("publish", arg_matches)) => publish::publish(arg_matches),
-        Some(("release", arg_matches)) => todo!(),
+        Some(("publish", arg_matches)) => {
+            publish::publish(arg_matches).map_err(Error::PublishError)
+        }
+
+        Some(("release", arg_matches)) => {
+            release::release(arg_matches).map_err(Error::ReleaseError)
+        }
+
         _ => unreachable!("Exhausted list of subcommands and subcommand_required prevents `None`"),
     };
 

tools/src/release.rs

@@ -3,11 +3,31 @@ pub fn command() -> clap::Command {
         .about("Prepares and commits the changes required to release agb")
         .arg(
             clap::Arg::new("version")
+                .required(true)
                 .help("New version to release")
                 .value_parser(version_parser),
         )
+        .arg(
+            clap::Arg::new("Dry run")
+                .long("dry-run")
+                .help("Don't do anything with git (but does everything else)")
+                .action(clap::ArgAction::SetTrue),
+        )
 }
 
+pub fn release(matches: &clap::ArgMatches) -> Result<(), Error> {
+    let dry_run = matches.get_one::<bool>("Dry run").expect("defined by clap");
+    let version = matches
+        .get_one::<Version>("version")
+        .expect("defined by clap");
+
+    println!("dry run: {}, version: {:?}", dry_run, version);
+    todo!()
+}
+
+#[derive(Debug)]
+pub enum Error {}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 struct Version {
     major: u32,
@@ -52,7 +72,9 @@ impl std::str::FromStr for Version {
 }
 
 fn version_parser(maybe_version: &str) -> Result<Version, &'static str> {
-    maybe_version.parse().map_err(|_| "Failed to parse version")
+    maybe_version
+        .parse()
+        .map_err(|_| "Failed to parse version, must be of the format x.y.z")
 }
 
 #[cfg(test)]