refactor subcommand behavior

src/main.rs

@@ -3,7 +3,7 @@ use clap::Parser;
 
 mod git_fs;
 mod subcommands;
-use subcommands::{Subcommand, SubcommandType};
+use subcommands::{GitSubcommand, SubcommandType};
 
 const GIT_DIR: &str = ".rgit";
 
@@ -17,8 +17,5 @@ struct CmdArgs {
 fn main() {
     let args = CmdArgs::parse();
 
-    match args.cmd.run() {
-        Err(str) => println!("Some error occured: {str}"),
-        Ok(str) => println!("{str}"),
-    }
+    if let Err(str) = args.cmd.run() { eprintln!("Some error occured: {str}") }
 }

src/subcommands/add.rs

@@ -7,17 +7,18 @@ use crate::{
     subcommands::hash_object::HashObjectSubcommand,
 };
 
-use super::Subcommand;
+use super::GitSubcommand;
 
 #[derive(Parser, Debug)]
 pub struct AddSubcommand {
     pub paths: Vec<String>,
 }
 
-impl Subcommand for AddSubcommand {
-    fn run(&self) -> Result<String> {
+impl GitSubcommand for AddSubcommand {
+    fn run(&self) -> Result<()> {
         if self.paths.is_empty() {
-            return Ok(String::from("Nothing specified, nothing added"));
+            println!("Nothing specified, nothing added");
+            return Ok(());
         }
 
         let mut index = Index::load()?;
@@ -38,6 +39,6 @@ impl Subcommand for AddSubcommand {
 
         index.save()?;
 
-        Ok(String::from(""))
+        Ok(())
     }
 }

src/subcommands/hash_object.rs

@@ -4,7 +4,7 @@ use hex::encode;
 
 use crate::{
     git_fs::object::{Blob, GitObject},
-    subcommands::Subcommand,
+    subcommands::GitSubcommand,
 };
 
 #[derive(Parser, Debug)]
@@ -30,9 +30,10 @@ impl HashObjectSubcommand {
     }
 }
 
-impl Subcommand for HashObjectSubcommand {
-    fn run(&self) -> Result<String> {
+impl GitSubcommand for HashObjectSubcommand {
+    fn run(&self) -> Result<()> {
         let hash = self.run_raw()?;
-        Ok(encode(hash))
+        println!("{}", encode(hash));
+        Ok(())
     }
 }

src/subcommands/init.rs

@@ -5,15 +5,15 @@ use std::{fs, path::Path};
 
 use crate::GIT_DIR;
 use crate::git_fs::head::Head;
-use crate::subcommands::Subcommand;
+use crate::subcommands::GitSubcommand;
 
 #[derive(Parser, Debug)]
 pub struct InitSubcommand {
     directory: Option<String>,
 }
 
-impl Subcommand for InitSubcommand {
-    fn run(&self) -> Result<String> {
+impl GitSubcommand for InitSubcommand {
+    fn run(&self) -> Result<()> {
         let path = match &self.directory {
             None => Path::new("."),
             Some(path) => Path::new(path),
@@ -40,15 +40,17 @@ impl Subcommand for InitSubcommand {
         let canonical_path = path.canonicalize();
 
         if new_repo {
-            Ok(format!(
+            println!(
                 "Reinitialized exisiting Git repo in {}",
                 canonical_path?.display()
-            ))
+            );
         } else {
-            Ok(format!(
+            println!(
                 "Initialized empty Git repo in {}",
                 canonical_path?.display()
-            ))
-        }
+            );
+        };
+
+        Ok(())
     }
 }

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(),

src/subcommands/rm.rs

@@ -4,7 +4,7 @@ use std::path::Path;
 
 use crate::git_fs::{gitignore::expands_and_filter_path, index::Index};
 
-use super::Subcommand;
+use super::GitSubcommand;
 
 #[derive(Parser, Debug)]
 pub struct RmSubcommand {
@@ -15,10 +15,11 @@ pub struct RmSubcommand {
     pub paths: Vec<String>,
 }
 
-impl Subcommand for RmSubcommand {
-    fn run(&self) -> Result<String> {
+impl GitSubcommand for RmSubcommand {
+    fn run(&self) -> Result<()> {
         if self.paths.is_empty() {
-            return Ok(String::from("Nothing specified, nothing removed"));
+            println!("Nothing specified, nothing removed");
+            return Ok(());
         }
 
         let mut index = Index::load()?;
@@ -32,6 +33,6 @@ impl Subcommand for RmSubcommand {
 
         index.save()?;
 
-        Ok(String::from(""))
+        Ok(())
     }
 }