[feat(libra)]: 为 config 命令添加 --default=<default-value> 参数

[erasernoob]

pr 完成了 r2cn 测试任务 #1116 ，为 config 命令添加 --default=<default-value> 参数

同时在 config_test 中添加了相对应的三个边界情况测试用例.

1. 使用 get 参数无 --default 参数情况

#[tokio::test]
async fn test_config_get() {
    let temp_path = tempdir().unwrap();
    // start a new libra repository in a temporary directory
    test::setup_with_new_libra_in(temp_path.path()).await;

    // set the current working directory to the temporary path
    let _guard = test::ChangeDirGuard::new(temp_path.path());

    let args = config::ConfigArgs {
        add: false,
        get: true,
        get_all: false,
        unset: false,
        unset_all: false,
        list: false,
        key: Some("user.name".to_string()),
        valuepattern: Some("value".to_string()),
        default: None,
    };
    config::execute(args).await;
}

执行结果为：

Initializing empty Libra repository in /tmp/.tmpES28oF/.libra

2. 有 --default 参数无 get 或 get-all 参数情况

#[tokio::test]
#[serial]
async fn test_config_get_failed() {
    let temp_path = tempdir().unwrap();
    // start a new libra repository in a temporary directory
    test::setup_with_new_libra_in(temp_path.path()).await;

    let args = config::ConfigArgs {
        add: true,
        get: false,
        get_all: false,
        unset: false,
        unset_all: false,
        list: false,
        key: Some("user.name".to_string()),
        valuepattern: Some("value".to_string()),
        default: Some("erasernoob".to_string()),
    };
    config::execute(args).await;
}

执行结果如下：

Initializing empty Libra repository in /tmp/.tmpDP1Nwt/.libra
error: default value is only valid when get (get_all) is set

3. get 与 --default 参数都设置

#[tokio::test]
async fn test_config_get_with_default() {
    let temp_path = tempdir().unwrap();
    // start a new libra repository in a temporary directory
    test::setup_with_new_libra_in(temp_path.path()).await;

    let _guard = test::ChangeDirGuard::new(temp_path.path());

    let args = config::ConfigArgs {
        add: false,
        get: true,
        get_all: false,
        unset: false,
        unset_all: false,
        list: false,
        key: Some("user.name".to_string()),
        valuepattern: Some("value".to_string()),
        default: Some("erasernoob".to_string()),
    };
    config::execute(args).await;
}

执行结果如下：

Initializing empty Libra repository in /tmp/.tmpAYdWuR/.libra
erasernoob

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Name	Status	Preview	Comments	Updated (UTC)
mega	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 15, 2025 4:15am

[erasernoob]

@genedna Hi! 我已经修复了之前提到的问题，麻烦有空再帮忙 review 一下～ Thanks

[genedna]

@erasernoob ，

你看一下 Action 中测试失败的愿意

[erasernoob]

@genedna ，
找到原因了，因为我在本地是直接单个运行的测试用例，就不会存在并发运行导致工作目录冲突的现象，action 中是整个项目并行运行测试，工作目录冲突导致的测试失败，我在相应的测试函数上加入了 #[serial] attribute macro 就没问题了，本地测试 cmmand test 模块也没问题

[genedna]

@erasernoob ，

你需要在 https://github.com/web3infra-foundation/mega/blob/main/aria/contents/docs/libra/command/config/index.mdx 中加入文档说明参数如何使用

[erasernoob]

@genedna ，
Hi! 已加入完整的 config 命令参数使用文档说明

[Copilot]

Pull Request Overview

This PR adds support for a new --default parameter to the config command in Libra. The changes include implementing default value handling in the command execution logic, adding tests for various edge cases associated with the --default parameter, updating the repository error messages, and revising the documentation.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
libra/tests/command/config_test.rs	Added tests covering scenarios with and without the --default parameter
libra/src/command/config.rs	Updated command execution and validation logic to incorporate the --default parameter
libra/src/utils/util.rs	Updated error message to refer to a libra repository instead of a git repository
aria/contents/docs/libra/command/config/index.mdx	Revised documentation to include usage details for the new --default parameter

Comments suppressed due to low confidence (1)

libra/tests/command/config_test.rs:8

• Consider capturing and asserting the stdout output in these tests rather than relying solely on printed output, which will improve automated verification of the behavior.

async fn test_config_get_failed() {