File scrcpy-update-server of Package scrcpy

#!/bin/sh -e

VERSION=@VERSION@
SHA256=@SHA256@

URLS="https://github.com/Genymobile/scrcpy/releases/download/v$VERSION/scrcpy-server-v$VERSION"
DESTDIR=/usr/share/scrcpy
FILENAME=scrcpy-server
DEST="$DESTDIR/$FILENAME"
TIMEOUT=10
MAXTIME=30

check() {
  echo "$SHA256  $1" | sha256sum --check > /dev/null 2>&1
  return $?
}

if check "$DEST"; then
  echo "[scrcpy] Server $VERSION already up to date"
  exit 0
fi

if [ "$(id -u)" != 0 ] && [ "$1" != -f ]; then
  echo "Please run as root. Use -f to override."
  exit 255
fi

TEMPFILE=$(mktemp -t "$FILENAME.XXXXXXXXXX")

cleanup() {
  rm -f "$TEMPFILE"
}

trap cleanup EXIT
trap cleanup INT

IFS='
'
for url in $URLS; do
  echo "[scrcpy] Downloading prebuilt server from $url ..."
  if command -v curl > /dev/null 2>&1; then
    curl --connect-timeout "$TIMEOUT" --max-time "$MAXTIME" -L -o "$TEMPFILE" "$url" || continue
  elif command -v wget > /dev/null 2>&1; then
    wget -T "$TIMEOUT" -t 2 -O "$TEMPFILE" "$url" || continue
  else
    echo "Please install 'wget' or 'curl' to download server file."
    exit 1
  fi

  if ! check "$TEMPFILE"; then
    echo "[scrcpy] Download file verification FAILED"
    continue
  fi
  echo "[scrcpy] Download file verification OK"

  mkdir -p "$DESTDIR"
  mv "$TEMPFILE" "$DEST"
  chmod 644 "$DEST"
  echo "[scrcpy] Server $VERSION installed"

  exit 0
done

exit 1