PowerShell: Setting an environment variable for a single command only
Generally, it would be better to pass info to the script via a parameter rather than a global (environment) variable. But if that is what you need to do you can do it this way:
$env:FOO = 'BAR'; ./myscriptThe environment variable $env:FOO can be deleted later like so:
Remove-Item Env:\FOO
I got motivated enough about this problem that I went ahead and wrote a script for it: with-env.ps1
Usage:
with-env.ps1 FOO=foo BAR=bar your command here# Supports dot-env files as wellwith-env.ps1 .\.env OTHER_ENV=env command hereOn the other hand, if you install Gow you can use env.exe which might be a little more robust than the quick script I wrote above.
Usage:
env.exe FOO=foo BAR=bar your command here# To use it with dot-env filesenv.exe $(cat .env | grep.exe -v '^#') SOME_OTHER_ENV=val your command
2 easy ways to do it in a single line:
$env:FOO='BAR'; .\myscript; $env:FOO=''$env:FOO='BAR'; .\myscript; Remove-Item Env:\FOOJust summarized information from other answers (thank you folks) which don't contain pure one-liners for some reason.