如何从批处理文件 (parent.bat) 执行批处理脚本 (child.bat)？原始问题（C# 运行 Pip 以编程方式安装在 Venv 中）

Question

我最初的问题是“C# 运行 Pip 以编程方式安装在 Venv 中”，但事实证明 C# 代码或 Pip 没有问题。但是使用批处理脚本。所以首先是帮助他人的编辑问题，然后是我的原始问题，仅供记录。

运行 一个带有命令的批处理脚本 运行 另一个批处理文件。

child.bat

@echo off
echo Child Batch File is running !!!
echo Doing some Important Child Batch Stuff here . . . .
echo ✔ Child Batch Completed it. Voila !!
echo Now exiting Child.bat

parent.bat

@echo off
echo Parent Batch File is running !!!
echo Doing some Important Stuff here . . . .
echo ✔ Completed it. Voila !!
echo Now running Child.bat . . .

echo -------------------------------------------------------

child.bat

// Comment: Some how below statements are not executing
echo -------------------------------------------------------

echo ✔ Completed it. Voila !!
echo I believe all the this are complete.
echo I am now exiting.

输出：

C:\Users\abc> parent.bat

Parent Batch File is running !!!
Doing some Important Stuff here . . . .
✔ Completed it. Voila !!. .
Now running Child.bat . . .
-------------------------------------------------------
Child Batch File is running !!!
Doing some Important Child Batch Stuff here . . . .
✔ Child Batch Completed it. Voila !!
Now exiting Child.bat

C:\Users\abc>

其他 parent.bat 回显命令在哪里。

预期输出：

Parent Batch File is running !!!
Doing some Important Stuff here . . . .
✔ Completed it. Voila !!. .
Now running Child.bat . . .
-------------------------------------------------------
Child Batch File is running !!!
Doing some Important Child Batch Stuff here . . . .
✔ Child Batch Completed it. Voila !!
Now exiting Child.bat
-------------------------------------------------------
Completed it. Voila !!
echo I believe all the this are complete.
echo I am now exiting.

只做记录的老问题

我有一个 C# 应用程序，它使用了一些 python 脚本。对于 运行 python 脚本，我需要一些依赖项。所以我创建了一个创建 VENV 的批处理文件。但它从来没有 运行s PIP 安装命令。

C# 代码到 运行 多个 cmd 语句。它创建一个批处理文件。

        public void abc() {
            var batFileName = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid()}.bat");
            using (var batFile = new StreamWriter(batFileName))
            {
                var pythonPath = Path.Combine(LocalAppData, ProjectGuid, HolocronFolders["HolocronPython"]);
                var venv = Path.Combine(LocalAppData, ProjectGuid, HolocronFolders["HolocronVenv"]);
                batFile.WriteLine($"{pythonPath}\python.exe -m venv {venv}");
                batFile.WriteLine($"{venv}\Scripts\activate.bat");
                batFile.WriteLine($"pip install rich"); //  Not running in venv
            }
            var process = new Process();
            var startInfo = new ProcessStartInfo
            {
                FileName = "cmd.exe",
                Arguments = $"/C {batFileName}"
            };
            process.StartInfo = startInfo;
            process.Start();
            File.Delete(batFileName);
        }

已创建批处理文件

Path_to_python\python.exe -m venv path_to_venv_folder
Path_to_venv_folder\Scripts\activate.bat
pip install rich            --//-- Comments: Not running in Venv. Actually not running at all.

命令输出：

c:\user\abc> Path_to_python\python.exe -m venv path_to_venv_folder
c:\user\abc> Path_to_venv_folder\Scripts\activate.bat
(path_to_venv_folder) c:\user\abc> 

Answer 1

当从命令或脚本执行另一个批处理文件时，上下文将更改为该批处理文件，并且父文件命令会以某种方式丢失。 正如 @Squashmas 所说“为了将控制传递回父批处理文件，必须使用 CALL 命令调用子批处理文件”

child.bat

@echo off
echo Child Batch File is running !!!
echo Doing some Important Child Batch Stuff here . . . .
echo ✔ Child Batch Completed it. Voila !!
echo Now exiting Child.bat

parent.bat

@echo off
echo Parent Batch File is running !!!
echo Doing some Important Stuff here . . . .
echo ✔ Completed it. Voila !!
echo Now running Child.bat . . .

echo -------------------------------------------------------

rem Comments: CALL will execute the .bat and return the cmd context back to the parent.bat for further execution.
CALL child.bat   

echo -------------------------------------------------------

echo ✔ Completed it. Voila !!
echo I believe all the this are complete.
echo I am now exiting.

记录在案的旧答案。

所以批处理脚本中的命令应该是：

Path_to_python\python.exe -m venv path_to_venv_folder
CALL Path_to_venv_folder\Scripts\activate.bat
pip install rich

CALL activate.bat 会将 cmd 上下文传递回父批处理文件。

我在这里所做的与使用 CALL 几乎相同。我不推荐这个。使用呼叫。

Path_venv_folder\Scripts\activate.bat && pip install rich

在第一个命令 运行 之后，由于 && 运算符上下文仍然与父调用的 cmd 一起，因为命令尚未完成并且 cmd 上下文未传递给子批处理脚本在这种情况下 activate.bat 直到执行整个命令并返回 true 或等效项。

使用CALL的输出是：

c:\user\abc> Path_to_python\python.exe -m venv path_to_venv_folder
c:\user\abc> CALL Path_to_venv_folder\Scripts\activate.bat
(path_to_venv_folder) c:\user\abc> pip install rich
installing rich..............
installing colorama....................
blah blah blah

(path_to_venv_folder) c:\user\abc>

使用&&的输出是：

c:\user\abc> Path_to_python\python.exe -m venv path_to_venv_folder
c:\user\abc> CALL Path_to_venv_folder\Scripts\activate.bat && pip install rich
installing rich..............
installing colorama....................
blah blah blah

(path_to_venv_folder) c:\user\abc>

注意 venv 激活的 cmd 在执行 pip 命令后显示。虽然 pip 运行 在 venv 的上下文中并不准确，所以我不推荐它。

PS: 我不是批处理脚本专家所以如果我错了请指正。我会尽快改进的

部分参考资料：

CALL | Microsoft Docs