Cmdlets/Internal/PowerShellManipulation/Get-VariableFromScriptFile.ps1

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<#
Copyright 2016 ASOS.com Limited
 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 
    http://www.apache.org/licenses/LICENSE-2.0
 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
#>


<#
.NAME
    Get-VariableFromScriptFile
 
.SYNOPSIS
    Returns the variable statement or variable value from a powershell script file
#>

function Get-VariableFromScriptFile {
    param ( 
        $Path,
        $VariableName,
        [switch]$DontResolveVariable
    )

    $variableValue = Get-VariableStatement -Path $Path -VariableName $VariableName -Type Value
    if ($null -eq $variableValue) {
        throw "File '$Path' does not contain metadata variable '$variableName'"
    }

    $scriptBlock = [ScriptBlock]::Create($variableValue)
    if ($DontResolveVariable) {
        return $scriptBlock
    } else {
        return ($scriptBlock.Invoke())
    } 
}