Android storage backup script

script.ps1

echo ""
echo ""
echo "====== FILE PULLER ======"
echo ""
echo ""
$index = 0

if (Test-Path ./status) {
  $confirmation = $Host.UI.PromptForChoice("", "It appears the last operation was interrupted. Continue?", @("&Continue", "&Restart", "&Exit"), 0)
  if ($confirmation -eq 0) {
      [int]$index = Get-Content ./status
      echo ""
      echo "Loaded index at $index"
  }
  if ($confirmation -eq 2) {
      exit
  }
}

if ($index -lt 1) {
  echo ""
  echo "Current index is 0. Reloading file list to start new operation..."
  echo 0 > ./status
  adb shell "find /storage/emulated -type f" > files.txt
} else {
  echo "No file pull performed to continue last operation!"
}


$files = [System.Collections.Generic.List[string]]::new()
$invalid = 0
foreach($line in Get-Content .\files.txt) {
  if($line -match "^/.*") {
    $files.Add($line)
  } else {
    $invalid += 1
  }
}

echo "Found $($files.Count) valid and $invalid invalid files."

echo ""
$confirmation = $Host.UI.PromptForChoice("", "Start pulling files?", @("&Yes", "&No"), 0)
if ($confirmation -ne 0) {
    exit
}

echo ""
echo "Pulling $valid files..."

echo ""
$stopwatch = [System.Diagnostics.Stopwatch]::StartNew()
for (; $index -lt $files.Count; $index++) {
  $file = $files[$index]
  echo $index > ./status

  if ($stopwatch.Elapsed.TotalMilliseconds -ge 100) {
    Write-Progress -Activity "Pulling files" -Status "[$index / $($files.Count)] Pulling $file" -PercentComplete ($index / $files.Count * 100)
    $stopwatch.Restart()
  }

  $parentFolder = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($(Split-Path -Path ".$file"))
  if (!(Test-Path $parentFolder))
  {
    New-Item -Path $parentFolder -ItemType Directory *>$null
  }

  echo -n "$file  "
  adb pull -a "$file" ".$file" *>$null

  if($LASTEXITCODE -ne 0) {

    echo ""
    Write-Host "Error on last pull operation! Retrying..." -ForegroundColor Yellow

    echo -n "$file  "
    echo adb pull -a "$file" ".$file"
    adb pull -a "$file" ".$file"

    if($LASTEXITCODE -ne 0) {
      echo ""
      Write-Host "Failed again! Please review." -ForegroundColor Red
      echo ""

      $confirmation = $Host.UI.PromptForChoice("", "Continue or Exit (Progress is saved)?", @("&Continue", "&Exit"), 0)
      if ($confirmation -ne 0) {
          exit
      }
    }
  }
}
Write-Progress -Activity "Pulling files" -Completed