Find-UpgradablePSResource.ps1

#!/usr/bin/env pwsh
#Requires -Module Microsoft.PowerShell.PSResourceGet
function Find-UpgradablePSResource {

    param(
        [string] $Repository = 'PSGallery',
        [switch] $Prerelease)

    $newestModules = 
        Get-Module -ListAvailable |
        Group-Object -Property Name, Author |
        ForEach-Object -Process {
            $_.Group | Sort-Object -Property Version -Descending -Top 1
        }
        
    if ($newestModules.Count -eq 0) {
        return
    }

    $newestModuleTable = @{}

    foreach ($module in $newestModules) {
        $newestModuleTable[$module.Name] = $module
    }

    $findPSResourceParams = @{
        Name       = @($newestModuleTable.Keys)
        Repository = $Repository
        Type       = 'Module'
        ErrorAction = 'Ignore'
    }

    if ($Prerelease) {
        $findPSResourceParams['Prerelease'] = $true
    }

    $candidateModules =
        Find-PSResource @findPSResourceParams |
        Where-Object -FilterScript {
            $installedModule = $newestModuleTable[$_.Name]
            return $_.Author -eq $installedModule.Author -and $_.Version -gt $installedModule.Version
        }

    foreach ($candidateModule in $candidateModules) {
        $installedModule = $newestModuleTable[$candidateModule.Name]

        $version = $candidateModule.AdditionalMetadata.NormalizedVersion
        if (!$version) {
            $version = $candidateModule.Version.ToString(3)
        }

        $result = [PSCustomObject] @{
            Name             = $installedModule.Namea
            Author           = $installedModule.Author
            InstalledVersion = $installedModule.Version
            Path             = $installedModule.Path
            AvailableVersion = $candidateModule.Version
            Description      = $candidateModule.Description
            NewModuleUrl     = "https://www.powershellgallery.com/packages/$($candidateModule.Name)/$($version)"
        }

        Write-Output $result
    }
}