PowerShell: Add every sub-directory to path

Question

On Windows 10 and via PowerShell, how do you add every sub-directory to the PATH variable?

I fine some method for Linux (e.g., this one), and "adapting" them to PowerShell, I came across the following.

'$env:PATH = $env:PATH + (find C:\Users\appveyor\ -type d -printf "\";%pbuild\\"")'

This throws The filename, directory name, or volume label syntax is incorrect.

A bit more context: I am running this on appveyor, and trying to add every path under appveyor (simplified for clarity) such as C:\Users\appveyor\*\build\ to path.

Answer 1

$env:PATH = 
    @($env:PATH) + 
    [string]::join(
        ";", 
        (Get-ChildItem -LiteralPath "[PATH TO SEARCH]" -Directory -Recurse).fullname
    )

This based on @briantist's suggestion; the main difference is in the join syntax.

To get this work on appveyor, do the following:

{ps:
    "$env:PATH = 
         @($env:PATH) + [string]::join(
             \";\", 
             (Get-ChildItem -LiteralPath \"[PATH TO SEARCH]\" -Directory -Recurse).fullname
    )"
}