Add Windows PowerShell script

git-mirror-zip.ps1

@@ -0,0 +1,26 @@
+param(
+  [Parameter(Mandatory = $true, Position = 0)]
+  [string]$Url,
+
+  [Parameter(Position = 1)]
+  [string]$Output = "repo.zip"
+)
+
+$ErrorActionPreference = "Stop"
+$WorkDir = ".tmp_git_mirror"
+
+try {
+  Write-Host "[1/3] Cloning mirror of $Url ..."
+  git clone --mirror $Url $WorkDir
+
+  Write-Host "[2/3] Creating $Output with maximum compression ..."
+  Compress-Archive -Path "$WorkDir\*" -DestinationPath $Output -CompressionLevel Optimal -Force
+
+  $Size = [math]::Round((Get-Item $Output).Length / 1MB, 2)
+  Write-Host "[3/3] Done: $Output ($Size MB)"
+}
+finally {
+  if (Test-Path $WorkDir) {
+    Remove-Item -Recurse -Force $WorkDir
+  }
+}