MoE-backup.ps1

# A simple PowerShell script to backup Myth of Empires single player save file
# Backups are stored in My Documents\MoEBackup
# Twitter: @Kerbo_
#

###################################################
# Change this to your Steam path to MoE SaveGames #
$moeDir = "N:\SteamLibrary\steamapps\common\Myth of Empires\WindowsPrivateServer\MOE\Saved\SaveGames"
###################################################

$moeBackupDir = [Environment]::GetFolderPath("MyDocuments") + "\MoEBackup"
$dateString = $(get-date -f yyy-MM-dd_HH-mm)

# Create backup directory if it doesn't exist
New-Item -ItemType Directory -Force -Path $moeBackupDir | Out-Null

# Examine latest backup
Push-Location $moeBackupDir
$backup = gci SaveGames-* | select -last 1
# New temp dir
$parent = [System.IO.Path]::GetTempPath()
[string] $name = [System.Guid]::NewGuid()
$tempDir = New-Item -ItemType Directory -Path (Join-Path $parent $name)
# Extract and get hash
Expand-Archive -Path $backup -DestinationPath $tempDir
$backup_hash = Get-FileHash $tempDir\World\LargeTerrain_Central_Main_100.sav
# Remove temp dir
Remove-Item -LiteralPath $tempDir -Force -Recurse
Pop-Location

Push-Location $moeDir
$current_hash = Get-FileHash World\LargeTerrain_Central_Main_100.sav
if ( $backup_hash.Hash -eq $current_hash.Hash ) {
    Write-Host "Save matches latest backup, no backup needed"
} else {
    Write-Host "Backing up to $moeBackupDir\SaveGames-$dateString.zip"
    Compress-Archive -Path $moeDir\* -DestinationPath $moeBackupDir\SaveGames-$dateString.zip
    Write-Host "Done"
}
Pop-Location

Start-Sleep -Seconds 5