问题描述
我最初的问题是“C# 以编程方式在 Venv 中运行 Pip 安装”,但结果证明 C# 代码或 Pip 没有问题。但是使用批处理脚本。所以首先是经过编辑的问题以帮助他人,然后是我的原始问题,仅供记录。
使用命令运行批处理脚本以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
echo 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.
老问题只是记录
我有一个 C# 应用程序,它使用了一些 Python 脚本。要运行 python 脚本,我需要有一些依赖项。所以我创建了一个批处理文件来创建一个 VENV。但它从不运行 PIP 安装命令。
用于运行多个 cmd 语句的 C# 代码。它会创建一个批处理文件。
public void abc() {
var batFileName = Path.Combine(Path.GetTempPath(),$"{Guid.NewGuid()}.bat");
using (var batFile = new StreamWriter(batFileName))
{
var pythonPath = Path.Combine(LocalAppData,ProjectGuid,HolocronFolders["HolocronPython"]);
var venv = Path.Combine(LocalAppData,HolocronFolders["HolocronVenv"]);
batFile.WriteLine($"{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.
cmd 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>
解决方法
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,并且父文件命令以某种方式丢失。
正如 @Squashmas 所说“为了将控制权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
父.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。
我在这里所做的几乎与使用 CALL 相同。我不推荐这个。使用呼叫。
Path_venv_folder\Scripts\activate.bat && pip install rich
由于 &&
操作符,在第一条命令运行后,由于命令尚未完成,因此父级调用的 cmd 上下文仍然存在,并且在这种情况下,cmd 上下文未传递给子批处理脚本 {{1 }} 直到执行整个命令并返回 activate.bat
或等效项。
使用 true
的输出是:
CALL
使用 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>
的输出是:
&&
请注意,执行 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>
命令后会显示 venv
激活的 cmd。尽管 pip
在 pip
的上下文中运行,但它并不准确,因此我不推荐它。
PS:我不是批处理脚本专家,所以如果我错了,请纠正我。我会尽快改进。
一些参考资料: