feat: Add the capability of cargo xtask eval

Author: wawahejun

README.md

@@ -52,7 +52,7 @@ cargo xtask eval --course learning-lm-rs --path exercises/learning-lm-rs
 # 评测 rustlings 课程 
 cargo xtask eval --course rustlings --path exercises/rustlings
 
-# 带详细输出的评测（适用于任意课程）
-cargo xtask eval --course <课程名> --verbose
+# 评测 learning-cxx 课程
+cargo xtask eval --course learning-cxx
 
 ```

learning-cxx_result.json eval_result.jsonlearning-cxx_result.json renamed to eval_result.json

@@ -141,6 +141,6 @@
     "total_exercations": 34,
     "total_succeeds": 1,
     "total_failures": 33,
-    "total_time": 30
+    "total_time": 61
   }
 }

learning-lm-rs_result.json

@@ -294,10 +294,10 @@ impl EvalArgs {
 
                     println!("{} {}", "\n评测课程:".blue().bold(), course_name);
 
-                    let (results, succeeds, failures, exercations) = if course_name == "learning-lm-rs" {
-                        self.eval_learning_lm(&path)?
-                    } else {
-                        self.eval_rustlings(&path)?
+                    let (results, succeeds, failures, exercations) = match course_name {
+                        "learning-lm-rs" => self.eval_learning_lm(&path)?,
+                        "learning-cxx" => self.eval_learning_cxx(&path)?,
+                        _ => self.eval_rustlings(&path)?
                     };
 
                     exercise_results.extend(results);
@@ -344,13 +344,8 @@ impl EvalArgs {
             },
         };
 
-        // 确定结果文件名
-        let result_filename = if let Some(course) = &self.course {
-            format!("{}_result.json", course)
-        } else {
-            "eval_result.json".to_string()
-        };
-
+        // 使用固定的结果文件名
+        let result_filename = "eval_result.json";
         let json_result = serde_json::to_string_pretty(&result)?;
         fs::write(&result_filename, json_result)?;
         println!("");

xtask/src/eval.rs

@@ -1,4 +1,4 @@
-use anyhow::{Context, Result};
+use anyhow::{Context, Result};
 use clap::Args;
 use colored::*;
 use std::fs;