refactor subcommand behavior

src/subcommands/mod.rs

@@ -3,6 +3,7 @@ use crate::subcommands::{
     test::TestSubcommand,
 };
 use anyhow::Result;
+use clap::Subcommand;
 
 mod add;
 mod hash_object;
@@ -10,7 +11,7 @@ mod init;
 mod rm;
 mod test;
 
-#[derive(clap::Parser, Debug)]
+#[derive(Debug, Subcommand)]
 pub enum SubcommandType {
     /// Add file(s) to index
     Add(AddSubcommand),
@@ -18,16 +19,18 @@ pub enum SubcommandType {
     Rm(RmSubcommand),
     /// Init a Git repository
     Init(InitSubcommand),
+    #[clap(hide = true)]
     HashObject(HashObjectSubcommand),
+    #[clap(hide = true)]
     Test(TestSubcommand),
 }
 
-pub trait Subcommand {
-    fn run(&self) -> Result<String>;
+pub trait GitSubcommand {
+    fn run(&self) -> Result<()>;
 }
 
-impl Subcommand for SubcommandType {
-    fn run(&self) -> Result<String> {
+impl GitSubcommand for SubcommandType {
+    fn run(&self) -> Result<()> {
         match self {
             Self::Add(cmd) => cmd.run(),
             Self::Rm(cmd) => cmd.run(),