Get-LatestGitHub

using namespace System.Management.Automation.Host

Clear-Host

function Get-LatestGitHubVersion{
<#
    .SYNOPSIS
        A function to get the Latest Stable Version of a GitHub repository.
    .DESCRIPTION
        This function web scrapes a GitHub repository and
        parses out the Latest Stable Version.
        This function will return the latest version as a string.

    .PARAMETER repos
        Repository.

    .EXAMPLE
        Get-LatestGitHubVersion 'powershell/powershell'
        Get-LatestGitHubVersion 'audacity/audacity'
#>
    Param ( [Parameter(Mandatory=1)][string]$repos
    )
    $url = "https://api.github.com/repos/$repos/releases/latest"
    try{
        $tag = Invoke-RestMethod $url
        return $tag.tag_name
    }catch{
        $_.exception | Write-Warning
        return $null
    }
}

function Download-LatestGitHubVersion{
<#
    .SYNOPSIS
        A function to download the Lastest Stable Version of a GitHub repository.
    .DESCRIPTION
        This function web scrapes a GitHub repository and downloads
        the latest stable version.  The download will be saved to Users Downloads folder.
        This function will return the full path string of the downloaded file.

    .PARAMETER repos
        Repository.
    .PARAMETER filter
        Filter string for Downloadable file.

    .EXAMPLE
        Download-LatestGitHubVersion 'powershell/powershell' '*win*x64*.msi'
        Download-LatestGitHubVersion 'audacity/audacity' '*64*.exe'
#>
    Param ( [Parameter(Mandatory=1)][string]$repos,
            [Parameter(Mandatory=1)][string]$filter
    )
    $url = "https://api.github.com/repos/$repos/releases/latest"
    try{
        $tag = Invoke-RestMethod $url
        $latest = $tag.assets | Where-Object { $_.name -like $filter }
        $file = "$HOME\Downloads\$($latest.name)"
        Write-Host $('Dowloading latest release to: ' + $file)
        Invoke-WebRequest $latest.browser_download_url -Out $file
        return $file
    }catch{
        $_.exception | Write-Warning
        return $null
    }
}

Get-LatestGitHubVersion 'powershell/powershell'
Get-LatestGitHubVersion 'audacity/audacity'
Get-LatestGitHubVersion 'microsoft/typescript'
Get-LatestGitHubVersion 'notepad-plus-plus/notepad-plus-plus'

Download-LatestGitHubVersion 'powershell/powershell' '*win*x64*.msi'
Download-LatestGitHubVersion 'audacity/audacity' '*64*.exe'
Download-LatestGitHubVersion 'notepad-plus-plus/notepad-plus-plus' '*x64*.exe'