Init commit

src/subcommands/init.rs

@@ -0,0 +1,60 @@
+use clap::Parser;
+use std::{
+    fs,
+    path::Path
+};
+
+use crate::git_fs::head::Head;
+use crate::subcommands::Subcommand;
+use crate::GIT_DIR;
+
+use super::CmdResult;
+
+#[derive(Parser, Debug)]
+pub struct InitSubcommand {
+    directory: Option<String>,
+}
+
+impl Subcommand for InitSubcommand {
+    fn run(&self) -> CmdResult {
+        let path = match &self.directory {
+            None => Path::new("."),
+            Some(path) => Path::new(path),
+        }.join(GIT_DIR);
+
+        let new_repo = path.exists();
+
+        match fs::create_dir_all(&path) {
+            Err(_) => return Err("Error while creating dir".to_owned()),
+            Ok(()) => (),
+        };
+
+        let folders = [
+            "objects/info",
+            "objects/pack",
+            "refs/heads",
+            "refs/tags",
+        ];
+
+        for folder in folders {
+            match fs::create_dir_all(&path.join(folder)) {
+                Err(_) => return Err("".to_owned()),
+                Ok(()) => (),
+            };
+        }
+
+        let head = Head { ref_to: String::from("refs/heads/master") };
+        match head.save() {
+            Err(_) => return Err("".to_owned()),
+            Ok(()) => (),
+        };
+
+        let canonical_path = path.canonicalize();
+
+        if new_repo {
+            Ok(format!("Reinitialized exisiting Git repo in {}", canonical_path.unwrap().display()))
+        } else {
+            Ok(format!("Initialized empty Git repo in {}", canonical_path.unwrap().display()))
+        }
+    }
+}