chore: refator in repository module

src/main.rs

@@ -1,6 +1,6 @@
 use anyhow::{Error, Result};
-use std::env;
-use std::{fs, path::PathBuf};
+use repository::default_init_path;
+use std::path::PathBuf;
 
 use clap::Parser;
 use clap::Subcommand;
@@ -8,10 +8,10 @@ use clap::Subcommand;
 mod error;
 mod kind;
 mod object;
+mod repository;
 mod tree;
 
-use crate::object::{read_object, write_blob};
-use crate::tree::write_tree;
+use crate::repository::Repository;
 
 #[derive(Parser)]
 #[command(name = "mg", about = "A simple git clone")]
@@ -45,42 +45,25 @@ enum Command {
     },
 }
 
-fn default_init_path() -> PathBuf {
-    env::var("REPO_PATH")
-        .map(PathBuf::from)
-        .unwrap_or_else(|_| PathBuf::from("."))
-}
-
-fn init_repository(path: PathBuf) -> Result<PathBuf> {
-    let git_dir = path.join(".git");
-
-    fs::create_dir(&git_dir)?;
-    fs::create_dir(git_dir.join("objects"))?;
-    fs::create_dir(git_dir.join("refs"))?;
-
-    fs::write(git_dir.join("HEAD"), "ref: refs/heads/main\n")?;
-
-    Ok(path)
-}
-
 fn main() -> Result<(), Error> {
     let cli = Cli::parse();
-    let repo_path = default_init_path();
+
+    let mut repo = Repository::new()?;
 
     match cli.command {
-        Command::Init { path } => match init_repository(path) {
+        Command::Init { path } => match repo.init_repository(&path) {
             Ok(path) => println!("Initialized empty Git repository in {:?}", path),
             Err(e) => eprintln!("Failed to initialize repository: {}", e),
         },
-        Command::CatFile { hash } => match read_object(&repo_path, &hash) {
+        Command::CatFile { hash } => match repo.read_object(&hash) {
             Ok(mut obj) => print!("{}", obj.string()?),
             Err(e) => eprintln!("Failed to read object: {}", e),
         },
-        Command::WriteBlob { file } => match write_blob(&repo_path, &file) {
+        Command::WriteBlob { file } => match repo.write_blob(&file) {
             Ok(hash) => println!("{}", hex::encode(hash)),
             Err(e) => eprintln!("Failed to write object: {}", e),
         },
-        Command::WriteTree { path } => match write_tree(&repo_path, &path) {
+        Command::WriteTree { path } => match repo.write_tree(&path) {
             Ok(hash) => println!("{}", hex::encode(hash)),
             Err(e) => eprintln!("Failed to write tree: {}", e),
         },

src/object.rs

@@ -1,3 +1,4 @@
+use crate::repository::Repository;
 use crate::{error::RuntimeError, kind::Kind};
 use anyhow::{anyhow, Context, Result};
 use flate2::{write::ZlibEncoder, Compression};
@@ -24,47 +25,90 @@ pub struct TreeObject {
     pub hash: [u8; 20],
 }
 
-pub fn read_object(path: &Path, object: &str) -> Result<Object<impl BufRead>> {
-    let object_path = path
-        .join(".git")
-        .join("objects")
-        .join(&object[..2])
-        .join(&object[2..]);
+impl Repository {
+    pub fn read_object(&self, object: &str) -> Result<Object<impl BufRead>> {
+        let object_path = self
+            .path
+            .join(".git")
+            .join("objects")
+            .join(&object[..2])
+            .join(&object[2..]);
 
-    let fd = File::open(&object_path).context("opening the object")?;
-    let zfd = flate2::read::ZlibDecoder::new(fd);
-    let mut buf_reader = std::io::BufReader::new(zfd);
+        let fd = File::open(&object_path).context("opening the object")?;
+        let zfd = flate2::read::ZlibDecoder::new(fd);
+        let mut buf_reader = std::io::BufReader::new(zfd);
 
-    let mut buf: Vec<u8> = Vec::new();
-    buf_reader
-        .read_until(0, &mut buf)
-        .context("read the object")?;
+        let mut buf: Vec<u8> = Vec::new();
+        buf_reader
+            .read_until(0, &mut buf)
+            .context("read the object")?;
 
-    match buf.pop() {
-        Some(0) => {}
-        Some(_) | None => return Err(RuntimeError::UnexpectedChar.into()),
-    };
+        match buf.pop() {
+            Some(0) => {}
+            Some(_) | None => return Err(RuntimeError::UnexpectedChar.into()),
+        };
 
-    let header = String::from_utf8(buf.clone()).context("converting header to utf-8")?;
+        let header = String::from_utf8(buf.clone()).context("converting header to utf-8")?;
 
-    let Some((object_type, object_size)) = header.split_once(' ') else {
-        anyhow::bail!("could not parse object header correctly");
-    };
+        let Some((object_type, object_size)) = header.split_once(' ') else {
+            anyhow::bail!("could not parse object header correctly");
+        };
 
-    let object_type = match object_type {
-        "blob" => Kind::Blob(true),
-        "commit" => Kind::Commit,
-        "tree" => Kind::Tree,
-        _ => anyhow::bail!("invalid object type found"),
-    };
+        let object_type = match object_type {
+            "blob" => Kind::Blob(true),
+            "commit" => Kind::Commit,
+            "tree" => Kind::Tree,
+            _ => anyhow::bail!("invalid object type found"),
+        };
 
-    let object_size = object_size.parse::<usize>()?;
+        let object_size = object_size.parse::<usize>()?;
 
-    Ok(Object {
-        kind: object_type,
-        _size: object_size,
-        data: buf_reader,
-    })
+        Ok(Object {
+            kind: object_type,
+            _size: object_size,
+            data: buf_reader,
+        })
+    }
+
+    pub fn write_blob(&self, file: &Path) -> Result<[u8; 20]> {
+        if !file.exists() || !is_path_in_repo(&self.path, file)? {
+            return Err(anyhow!("path does not exist"));
+        }
+
+        let content = std::fs::read(file)?;
+
+        Ok(self.write_object(Kind::Blob(false), &content)?)
+    }
+
+    pub fn write_object(&self, kind: Kind, content: &[u8]) -> Result<[u8; 20]> {
+        let mut hasher = Sha1::new();
+        hasher.update(format!("{} {}\0", kind.string(), content.len()).as_bytes());
+        hasher.update(content);
+        let hash = hasher.finalize().into();
+        let hash_str = hex::encode(hash);
+
+        let target_dir = self.path.join(".git").join("objects").join(&hash_str[..2]);
+        if !target_dir.exists() {
+            create_dir(&target_dir).context("could not create directory in .git/objects")?;
+        }
+
+        let target_file = target_dir.join(&hash_str[2..]);
+        if target_file.exists() {
+            return Ok(hash);
+        }
+
+        let file_out_fd = File::create(target_file).context("could not open target file")?;
+
+        let mut zlib_out = ZlibEncoder::new(file_out_fd, Compression::default());
+        write!(zlib_out, "{} {}\0", kind.string(), content.len())
+            .context("could not write header")?;
+        zlib_out.write(content)?;
+        zlib_out
+            .finish()
+            .context("could not compress or write file")?;
+
+        Ok(hash)
+    }
 }
 
 fn is_path_in_repo(repo_path: &Path, file_path: &Path) -> Result<bool> {
@@ -79,45 +123,6 @@ fn is_path_in_repo(repo_path: &Path, file_path: &Path) -> Result<bool> {
     Ok(file_canonical.starts_with(repo_canonical))
 }
 
-pub fn write_blob(repo_path: &Path, file: &Path) -> Result<[u8; 20]> {
-    if !file.exists() || !is_path_in_repo(repo_path, file)? {
-        return Err(anyhow!("path does not exist"));
-    }
-
-    let content = std::fs::read(file)?;
-
-    Ok(write_object(repo_path, Kind::Blob(false), &content)?)
-}
-
-pub fn write_object(repo_path: &Path, kind: Kind, content: &[u8]) -> Result<[u8; 20]> {
-    let mut hasher = Sha1::new();
-    hasher.update(format!("{} {}\0", kind.string(), content.len()).as_bytes());
-    hasher.update(content);
-    let hash = hasher.finalize().into();
-    let hash_str = hex::encode(hash);
-
-    let target_dir = repo_path.join(".git").join("objects").join(&hash_str[..2]);
-    if !target_dir.exists() {
-        create_dir(&target_dir).context("could not create directory in .git/objects")?;
-    }
-
-    let target_file = target_dir.join(&hash_str[2..]);
-    if target_file.exists() {
-        return Ok(hash);
-    }
-
-    let file_out_fd = File::create(target_file).context("could not open target file")?;
-
-    let mut zlib_out = ZlibEncoder::new(file_out_fd, Compression::default());
-    write!(zlib_out, "{} {}\0", kind.string(), content.len()).context("could not write header")?;
-    zlib_out.write(content)?;
-    zlib_out
-        .finish()
-        .context("could not compress or write file")?;
-
-    Ok(hash)
-}
-
 impl<R: BufRead> Object<R> {
     pub fn string(&mut self) -> Result<String> {
         let mut buf: Vec<u8> = Vec::new();

src/repository.rs

@@ -0,0 +1,57 @@
+use anyhow::Result;
+use std::{
+    env,
+    fs::{create_dir, read_to_string},
+    path::PathBuf,
+};
+
+pub struct Repository {
+    pub path: PathBuf,
+    pub ignore: Vec<String>,
+}
+
+pub fn default_init_path() -> PathBuf {
+    env::var("REPO_PATH")
+        .map(PathBuf::from)
+        .unwrap_or_else(|_| PathBuf::from("."))
+}
+
+impl Repository {
+    pub fn new() -> Result<Repository> {
+        let path = default_init_path();
+
+        let mut repo = Repository {
+            path,
+            ignore: Vec::new(),
+        };
+
+        repo.load_ignore()?;
+
+        Ok(repo)
+    }
+
+    fn load_ignore(&mut self) -> Result<bool> {
+        let ignore_path = self.path.join(".gitignore");
+        if !ignore_path.exists() {
+            return Ok(false);
+        }
+
+        let ignore_content = read_to_string(ignore_path)?;
+        self.ignore = ignore_content.lines().map(String::from).collect();
+
+        Ok(true)
+    }
+
+    pub fn init_repository(&mut self, path: &PathBuf) -> Result<PathBuf> {
+        self.path = path.clone();
+        let git_dir = self.path.join(".git");
+
+        create_dir(&git_dir)?;
+        create_dir(git_dir.join("objects"))?;
+        create_dir(git_dir.join("refs"))?;
+
+        std::fs::write(git_dir.join("HEAD"), "ref: refs/heads/main\n")?;
+
+        Ok(self.path.clone())
+    }
+}

src/tree.rs

@@ -3,55 +3,60 @@ use std::os::unix::fs::MetadataExt;
 use std::path::PathBuf;
 
 use crate::kind::Kind;
-use crate::object::{write_blob, write_object, TreeObject};
+use crate::object::TreeObject;
+use crate::repository::Repository;
 
-pub fn write_tree(repo_path: &PathBuf, path: &PathBuf) -> Result<[u8; 20]> {
-    let mut entries = Vec::new();
+impl Repository {
+    pub fn write_tree(&self, path: &PathBuf) -> Result<[u8; 20]> {
+        let mut entries = Vec::new();
 
-    let files = std::fs::read_dir(path)?;
-    for file in files {
-        let file = file?;
-        let file_type = file.file_type()?;
-        let file_name = file.file_name();
-        let file_path = file.path();
+        let files = std::fs::read_dir(path)?;
+        for file in files {
+            let file = file?;
+            let file_type = file.file_type()?;
+            let file_name = file.file_name();
+            let file_path = file.path();
 
-        // Skip the .git directory
-        if file_name == ".git" {
-            continue;
+            // Skip the .git directory
+            if file_name == ".git" {
+                continue;
+            }
+
+            let hash: [u8; 20];
+            let kind;
+
+            if file_type.is_dir() {
+                hash = self
+                    .write_tree(&file_path)
+                    .context("could not write_tree of subtree")?;
+                kind = Kind::Tree;
+            } else {
+                hash = self.write_blob(&file_path).context(format!(
+                    "could not write object {:?}",
+                    file_path.file_name()
+                ))?;
+                kind = Kind::Blob(file_path.metadata()?.mode() & 0o111 != 0);
+            }
+
+            entries.push(TreeObject {
+                mode: kind.to_mode().to_string(),
+                kind,
+                name: file_name.into_string().unwrap(),
+                hash,
+            })
         }
 
-        let hash: [u8; 20];
-        let kind;
+        entries.sort_by(|a, b| a.name.cmp(&b.name));
 
-        if file_type.is_dir() {
-            hash = write_tree(repo_path, &file_path).context("could not write_tree of subtree")?;
-            kind = Kind::Tree;
-        } else {
-            hash = write_blob(repo_path, &file_path).context(format!(
-                "could not write object {:?}",
-                file_path.file_name()
-            ))?;
-            kind = Kind::Blob(file_path.metadata()?.mode() & 0o111 != 0);
+        let mut out: Vec<u8> = Vec::new();
+        for entry in &entries {
+            out.extend_from_slice(entry.mode.as_bytes());
+            out.push(b' ');
+            out.extend_from_slice(entry.name.as_bytes());
+            out.push(0);
+            out.extend_from_slice(&entry.hash);
         }
 
-        entries.push(TreeObject {
-            mode: kind.to_mode().to_string(),
-            kind,
-            name: file_name.into_string().unwrap(),
-            hash,
-        })
+        self.write_object(Kind::Tree, &out).context("Write")
     }
-
-    entries.sort_by(|a, b| a.name.cmp(&b.name));
-
-    let mut out: Vec<u8> = Vec::new();
-    for entry in &entries {
-        out.extend_from_slice(entry.mode.as_bytes());
-        out.push(b' ');
-        out.extend_from_slice(entry.name.as_bytes());
-        out.push(0);
-        out.extend_from_slice(&entry.hash);
-    }
-
-    write_object(repo_path, Kind::Tree, &out).context("Write")
 }