Tauri应用执行bat脚本时CMD窗口闪烁问题求解

在Tauri应用中通过Rust的std::process::Command执行bat/cmd脚本时，会出现黑色CMD控制台窗口一闪而过的现象，示例代码中的关键执行逻辑如下：

let output = Command::new("cmd").args(["/C", &profile_path, "&", "echo", &env_flag, "&", "set"]).output().expect("process failed to execute");

完整代码：

extern crate mount_dir;
extern crate random_string;

use std::env::{set_var};
use std::process::Command;
use std::fs::{remove_dir_all};
use std::path::{Component, Path};
use std::io::{Error, BufRead, BufReader, ErrorKind};

use random_string::generate;

pub fn mount(tpath: &str, lpath: &str, hpath: &str, force: bool) -> Result<bool, Error> {

    if ! Path::new(&tpath).exists() {
        return Err(Error::new(ErrorKind::NotFound, format!("[{}] not found", &tpath)));
    }

    if Path::new(&lpath).exists() {
        if force {
            match remove_dir_all(&lpath) {
                Err(e) => return Err(e),
                _ => (),
            }
        } else {
            return Err(Error::new(ErrorKind::AlreadyExists, format!("[{}] already exists", &lpath)));
        }
    }

    let _hpath = format!("{}\\{}", lpath, hpath);

    mount_dir::mount(tpath, lpath, force)?;

    let app_data = format!("{}\\AppData", &_hpath);
    let roaming_app_data = format!("{}\\Roaming", &app_data);
    let local_app_data = format!("{}\\Local", &app_data);
    let temp = format!("{}\\Temp", &local_app_data);

    set_var("TMP", &temp);
    set_var("TEMP", &temp);
    set_var("HOME", &_hpath);
    set_var("HOMEPATH", &_hpath);
    set_var("USERPROFILE", &_hpath);
    set_var("HOMEDRIVE", get_disk(lpath));
    set_var("APPDATA", &roaming_app_data);
    set_var("LOCALAPPDATA", &local_app_data);
    set_var("PORTABLE_DESKTOP_ENV_LINK_PATH", &lpath);
    set_var("PORTABLE_DESKTOP_ENV_TARGET_PATH", &tpath);

    let mut profile_path = format!("{}\\.profile.cmd", &_hpath);
    if ! Path::new(&profile_path).exists() {
        profile_path = format!("{}\\.profile.bat", &_hpath);
    }
    if Path::new(&profile_path).exists() {
        let env_flag = format!(".env.{}.tmp", generate(32, "1234567890"));
        let output = Command::new("cmd").args(["/C", &profile_path, "&", "echo", &env_flag, "&", "set"]).output().expect("process failed to execute");
        let reader = BufReader::new(&*output.stdout);
        let mut is_env = false;
        for line in reader.lines() {
            let l = line.unwrap();
            if ! is_env {
                if env_flag.eq(l.trim()) {
                    is_env = true;
                }
                continue;
            }
            match l.trim().split_once('=') {
                Some((key, value)) => {
                    set_var(key, value);
                }
                None => ()
            }
        }
    }

    return Ok(true);
}

pub fn unmount(link: &str) -> bool {
    return mount_dir::unmount(link);
}

fn get_disk(path: &str) -> &str {
    match Path::new(path).components().next().unwrap() {
        Component::Prefix(prefix_component) => {
            return prefix_component.as_os_str().to_str().unwrap();
        }
        _ => unreachable!(),
    }
}

#[cfg(test)]
mod it_works {
    use super::*;
    use std::env;

    #[test]
    fn test_for_mount() {
        assert_eq!(mount(env::current_dir().unwrap().as_path().to_str().unwrap(), "T:\\work", "home", true).unwrap(), true);
    }

    #[test]
    fn test_for_unmount() {
        assert_eq!(unmount("T:\\work"), true);
    }
}

解决方案 #

方法一：设置Windows进程创建标志隐藏窗口 #

在Windows平台下，可以通过给Command添加CREATE_NO_WINDOW标志禁止控制台窗口弹出，具体步骤如下：

1. 添加依赖：在项目的Cargo.toml中添加winapi依赖：

[dependencies]
winapi = { version = "0.3", features = ["winbase"] }

2. 导入常量：在Rust代码中导入所需的Windows API常量：

use winapi::um::winbase::CREATE_NO_WINDOW;

3. 修改Command调用：在执行cmd的代码中添加creation_flags配置：

let output = Command::new("cmd")
    .args(["/C", &profile_path, "&", "echo", &env_flag, "&", "set"])
    .creation_flags(CREATE_NO_WINDOW) // 添加此行隐藏窗口
    .output()
    .expect("process failed to execute");

方法二：使用PowerShell替代CMD（可选） #

如果不想引入额外依赖，也可以改用PowerShell执行脚本，通过参数隐藏窗口：

let output = Command::new("powershell")
    .args(["-WindowStyle", "Hidden", "-Command", &format!("& '{}'; echo {}; set", profile_path, env_flag)])
    .output()
    .expect("process failed to execute");

这种方式不需要额外依赖，但需要注意路径和命令的转义处理，避免空格或特殊字符导致执行错误。

内容的提问来源于stack exchange，提问作者Kerwin Bryant