PowerShell-which is a handy PowerShell function that emulates the which command in Unix/Linux environments. It aids users in locating the executable path for a specific command within their current PowerShell session. This function leverages the Get-Command cmdlet to identify the command and fetches the executable path using the Definition property.

Setting up PowerShell-which in your PowerShell environment involves adding the function to your PowerShell profile file. Here's how you can do it:

1. Open PowerShell and run the following command to find the path of your profile file: $profile.CurrentUserAllHosts
2. If the file does not exist, create it by running the following command: New-Item -ItemType File -Path $profile.CurrentUserAllHosts -Force
3. Open the profile file in a text editor by running the following command: notepad $profile.CurrentUserAllHosts
4. Add the powershell-which function to the profile file by copying and pasting the function code into the file.
5. Save the profile file and close the text editor. Now, powershell-which function is ready for use in your PowerShell sessions and scripts.

which <command>

Example:

which python

This will return the path of the python.exe executable.