Private/Get-Version.ps1

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function Get-Version {
    <#
    .SYNOPSIS
        Extracts a version number from either a string or the content of a web page using a chosen or pre-defined match pattern.
 
    .DESCRIPTION
        Extracts a version number from either a string or the content of a web page using a chosen or pre-defined match pattern.
 
    .NOTES
        Site: https://packageology.com
        Author: Dan Gough
        Twitter: @packageologist
 
    .LINK
        https://github.com/DanGough/Nevergreen
 
    .PARAMETER String
        The string to process.
 
    .PARAMETER Uri
        The Uri to load web content from to process.
 
    .PARAMETER Pattern
        Optional RegEx pattern to use for version matching.
 
    .PARAMETER ReplaceWithDot
        Switch to automatically replace characters - or _ with . in detected version.
 
    .EXAMPLE
        Get-Version -String 'http://somewhere.com/somefile_1.2.3.exe'
 
        Description:
        Returns '1.2.3'
    #>

    [CmdletBinding(SupportsShouldProcess = $False)]
    param (
        [Parameter(
            Mandatory = $true,
            Position = 0,
            ValueFromPipeline = $true,
            ParameterSetName = 'String')]
        [ValidateNotNullOrEmpty()]
        [String[]] $String,
        [Parameter(
            Mandatory = $true,
            ParameterSetName = 'Uri')]
        [ValidatePattern('^(http|https)://')]
        [String[]] $Uri,
        [Parameter(
            Mandatory = $false,
            Position = 1)]
        [ValidateNotNullOrEmpty()]
        [String] $Pattern = '((?:\d+\.)+\d+)',
        [Switch] $ReplaceWithDot
    )

    begin {
        if ($PsCmdlet.ParameterSetName -eq 'Uri') {

            $ProgressPreference = 'SilentlyContinue'

            foreach ($CurrentUri in $Uri) {
                try {
                    $String += (Invoke-WebRequest -Uri $CurrentUri -DisableKeepAlive -UseBasicParsing).Content
                }
                catch {
                    Write-Error "Unable to query URL '$CurrentUri': $($_.Exception.Message)"
                }
            }
        }
    }

    process {

        foreach ($CurrentString in $String) {

            if ($CurrentString -match $Pattern) {
                if ($ReplaceWithDot) {
                    $matches[1].Replace('-','.').Replace('_','.')
                }
                else {
                    $matches[1]
                }
            }
            else {
                Write-Warning "No version found within $CurrentString using pattern $Pattern"
            }

        }

    }

    end {
    }

}