Powershell Version Of Running If Called From Shell

The aim of this playbook🏁 is to show the PowerShell version of a Python idiom that executes a script if called from a shell, but imports of called from REPL

def main()
    #CODE...
    
if __name__ == "__main__":
    main()

1. notes

• Use $MyInvocation.Invocation
• it has information about how the script was started.
• I use dot sourcing operator (.), but you if needed, use call opetator (&)
• If called with . foo.ps1, the main() executes.
• If imported with Import-Module foo.ps1, nothing happens (useful for importing with $profile, etc.)

#foo.ps1
Function main {
    # CODE
}

If ($MyInvocation.InvocationName -eq '.') { main }

2. sources

• What is the difference between dot (.) and ampersand (&) in PowerShell?
• https://stackoverflow.com/a/5582692/11082684