Import functions in a script with parameters - powershell

Question

I have a script with parameters:
param (
[Parameter(Mandatory=$true)][string]$VaultName,
[Parameter(Mandatory=$true)][string]$SecretName,
[Parameter(Mandatory=$true)][bool]$AddToMono = $false
)
...
In this script I want to include functions that I wrote in another ps1 file : common.ps1
I usually import this with
. .\common.ps1
but if I do that in the script I get:
The term '.\common.ps1' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the
path is correct and try again.
How do I import common.ps1 in this script?
Thanks!

Answer 1

The problem is that you are running the script from a different directory. PowerShell is looking for .\common.ps1 using the current directory, not the directory of the script. To get around this, use the built-in variable $PSScriptRoot, which contains the path of the current script. (I'm assuming you are using PowerShell v3.0 or later.)
common.ps1
function foo {
return "from foo"
}
with_params.ps1
param (
[Parameter(Mandatory=$true)][string]$VaultName,
[Parameter(Mandatory=$true)][string]$SecretName,
[Parameter(Mandatory=$true)][bool]$AddToMono = $false
)
. $PSScriptRoot\common.ps1
Write-Output "Vault name is $VaultName"
foo
I then executed this:
PS> .\some_other_folder\with_params.ps1 -VaultName myVault -SecretName secretName -AddToMono $false
and got this output:
Vault name is myVault
from foo