英文:
PowerShell not reloading when running & $profile
问题
我更新了我的个人资料以创建/调整自定义函数，以便在完成日常工作时使用。在保存了对个人资料的编辑后，在当前的 PowerShell 会话中运行 & $profile 后，新的/更新的函数不按照新的配置文件运行。只有在关闭当前会话并重新打开一个新的 PowerShell 实例后才能正常工作。我正在使用 PowerShell 7.3.5 和 Windows 终端。
例如....
在我的个人资料中，我有一些自定义函数，用于打开下载文件夹中最近下载的 X 个文件。运行此命令 open_dnld，不带输入将启动此文件夹中的最后一个文件。带有输入值 2 运行此命令 open_dnld(2) 将启动最近两个文件的进程。以下是函数定义：
旧函数：
Function open_dnld ([Int16] $NumFiles = 1) {foreach($file in Get-ChildItem ~/Downloads
| Sort-Object LastWriteTime -Descending
| Select-Object -First $NumFiles){
Start-Process $file
}
}
为了测试，我刚刚更新了该函数，将 $NumFiles 的默认值设置为 2，如下所示。在运行了 & $profile 之后，然后运行了 open_dnld(2)，该函数按照先前的定义工作，并且只打开一个文件。但是，当我关闭当前的终端会话，打开一个新的 PowerShell 实例使用 Windows 终端，然后运行命令 open_dnld(2) 时，该函数现在按照新的函数定义工作。
更新的函数：
Function open_dnld ([Int16] $NumFiles = 2) {foreach($file in Get-ChildItem ~/Downloads
| Sort-Object LastWriteTime -Descending
| Select-Object -First $NumFiles){
Start-Process $file
}
}
对我做错了什么有什么想法吗？
英文:
First post in Stack Overflow so bear with me...
I update my profile to create/adjust custom functions as I complete my day-day work. After saving the edits to my profile, the new/updated function isn't working according to the new profile after running & $profile in my current PowerShell session. It only works after closing my current session and reopening a new PowerShell instance. I am using PowerShell 7.3.5 and Windows Terminal.
For example....
In my profile I have a few custom functions to open the last X number of files downloaded to my Downloads folder. Running this command open_dnld with no input will start the last file in this folder. Running this command with an input of 2 open_dnld(2) starts the process for my last 2 files. Below is the function definition:
Old Function:
Function open_dnld ([Int16] $NumFiles = 1) {foreach($file in Get-ChildItem ~/Downloads
| Sort-Object LastWriteTime -Descending
| Select-Object -First $NumFiles){
Start-Process $file
}
}
For a test, I just updated the function with $NumFiles having a default value of 2 shown below. After running & $profile and thereafter open_dnld(2) the function works according to the previous definition and only opens 1 file. But, when I close my current terminal session, open a new instance of PowerShell using Windows Terminal, and then run the command open_dnld(2) the function now works according to the new function definition.
Updated Function:
Function open_dnld ([Int16] $NumFiles = 2) {foreach($file in Get-ChildItem ~/Downloads
| Sort-Object LastWriteTime -Descending
| Select-Object -First $NumFiles){
Start-Process $file
}
}
Any idea on what I am doing wrong?
答案1
得分: 0
要重新加载修改过的 $PROFILE 文件 ，您必须使用 .，即 点运算符：
. $PROFILE
相比之下，&，即 调用运算符 在一个 子 作用域中运行脚本，这意味着其中包含的任何别名、函数等只对该脚本可见，并且在脚本结束时超出作用域。
换句话说：运行 & $PROFILE 会破坏配置文件的初衷，即在 调用者 的作用域中定义别名、函数等 - 只有 . 才能做到这一点。
详细信息请参见 此答案。
英文:
To reload a modified $PROFILE file you must use ., the dot-sourcing operator:
. $PROFILE
By contrast, &, the call operator runs a script in a child scope, which means that any aliases, functions, ... it contains are visible to that script only, and go out of scope when the script ends.
In other words: running & $PROFILE defeats the very purpose of a profile file: to define aliases, functions, ... in the caller's scope - only . does that.
See this answer for details.
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