cli command

Cargo.toml

@@ -7,4 +7,5 @@ edition = "2021"
 
 [dependencies]
 sha1 = "0.10.6"
-hex = "0.4.3"
+hex = "0.4.3"
+clap = { version = "4.4.11", features = ["derive"] }

src/cli.rs

@@ -0,0 +1,57 @@
+use clap::{Parser, Subcommand};
+
+/// Rust实现的简易版本的Git，用于学习Rust语言
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+struct Cli {
+    /// The subcommand to run.
+    #[clap(subcommand)]
+    command: Command,
+}
+
+#[derive(Subcommand)]
+enum Command {
+    /// 初始化仓库
+    Init,
+    /// 添加文件到暂存区
+    Add {
+        /// 要添加的文件
+        files: Vec<String>,
+    },
+    /// 删除文件
+    Rm {
+        /// 要删除的文件
+        files: Vec<String>,
+        /// flag 删除暂存区的文件
+        #[clap(long, action)]
+        cached: bool,
+    },
+    /// 提交暂存区的文件
+    Commit {
+        #[clap(short, long)]
+        message: String,
+
+        #[clap(long, action)]
+        allow_empty: bool,
+    },
+}
+pub fn handle_command() {
+    let cli = Cli::parse();
+    match cli.command {
+        Command::Init => {
+            println!("init");
+        }
+        Command::Add { files } => {
+            println!("add: {:?}", files);
+        }
+        Command::Rm { files, cached } => {
+            println!("rm: {:?}, cached= {}", files, cached);
+        }
+        Command::Commit {
+            message,
+            allow_empty,
+        } => {
+            println!("commit: {:?}, allow empty={:?}", message, allow_empty);
+        }
+    }
+}

src/main.rs

@@ -1,5 +1,6 @@
 use std::collections::HashMap;
 type Index = HashMap<String, bool>;
+mod cli;
 fn main() {
-    println!("Hello, world!");
+    cli::handle_command();
 }