Environment variable

but only in a specific directory

The idea - use the Prompt function to check if you're in a specific dir and set/unset an env var:

function Prompt {
    $currentDir = Get-Location
    if ("C:\git\that-special-dir" -eq $currentDir) {
        $env:THAT_SPECIAL_ENV_VAR = "./extra.cer"
    }
    else {
        Remove-Item Env:\THAT_SPECIAL_ENV_VAR
    }
}

Extract the special env setting/unsetting to a function:

function SetOrUnSet-DirectoryDependent-EnvironmentVariables {
    $currentDir = Get-Location
    if ("C:\git\that-special-dir" -eq $currentDir) {
        $env:THAT_SPECIAL_ENV_VAR = "./extra.cer"
    }
    else {
        Remove-Item Env:\THAT_SPECIAL_ENV_VAR
    }
}

function Prompt {
    SetOrUnSet-DirectoryDependent-EnvironmentVariables
}

If your Prompt function is already overwritten by ex. oh-my-posh:

function SetOrUnSet-DirectoryDependent-EnvironmentVariables {
    $currentDir = Get-Location
    if ("C:\git\that-special-dir" -eq $currentDir) {
        $env:THAT_SPECIAL_ENV_VAR = "./extra.cer"
    }
    else {
        Remove-Item Env:\THAT_SPECIAL_ENV_VAR
    }
}

$promptFunction = (Get-Command Prompt).ScriptBlock

function Prompt {
    SetOrUnSet-DirectoryDependent-EnvironmentVariables
    $promptFunction.Invoke()
}

Why did I need this?

In a repository with several js scrapers run by NODE a few scrape data from misconfigured websites. These websites don't provide the intermediate certificate for https. Your browser automatically fills in the gap for convenience but a simple http client like axios will rightfully reject the connection as it can't verify who it is talking to (see more here)

Solution?

Use NODE_EXTRA_CA_CERTS

• You configure your production server with NODE_EXTRA_CA_CERTS.
• When testing locally you get tired of remembering to set NODE_EXTRA_CA_CERTS.
• You add NODE_EXTRA_CA_CERTS to your powershell profile. Now every time you run anything using NODE (like vs code) you see

  Warning: Ignoring extra certs from `./extra.cer`, load failed: error:02000002:system library:OPENSSL_internal:No such file or directory
  

• You get annoyed and you ask yourself how to set an environment variable but only in a specific directory

I use this myself here -> the public part of my powershell-profile