App Detection Scripts

A few handy detection functions that I use every day

Find-AppByFileExist.ps1

function Test-AppInstallByFile {
    param (
        [string]$exePath,
        [string]$appVersion
    )
    try {
        if (Test-Path $exePath) {
            if ($appVersion) {
                $app = get-command $exePath
                if ($appVersion -eq $app.Version) {
                    Write-Verbose "File found and version matches"
                    return $true
                }
                else {
                    Write-Verbose "File found but version doesnt match"
                    return $false
                }
            }
            else {
                Write-Verbose "File found not checking version"
                return $true
            }
            
        }
        else {
            Write-Verbose "File not found"
            return $false
        }
    }
    catch {
        Write-Verbose "An error occurred during testing"
        return $false
    }
}

Find-AppByGuid.ps1

function Find-AppByGuid {
    param(
        [string]$GUID
    )
    $GUIDKeys = Get-ChildItem HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
    if (Test-Path HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\) {
        $GUIDKeys += Get-ChildItem HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\
    }
    if ($GUIDKeys | Where-Object {$_ -like "*$GUID"}) {
        return $true
    }
    else {
        return $false
    }
}

Find-AppByGuid -Guid "c06d8ae5-69d3-49a2-84ce-f6e7af0ba9af"