#!/bin/sh

net session > /dev/null 2>&1 || {
  echo Not elevated.
  exit 1
}

# Cygwin upgrade helper script.
# Usage:
#
#   install-cygwin.sh [ ports ]
#
# If you intend to use it for new installs, you will need minimal bootstrap
# including POSIX shell interpreter and wget utility.
#
# You will have to edit the script to provide mirror URL of your choice.
#
# The script assumes existing installation of the same architecture as
# the host operating system.
# If you want to install 32-bit Cygwin on 64-bit host, override
# $ARCH with value other than "x86_64".
# F.e.
#
#   ARCH=x86 ./install-cygwin.sh

# Mirror URL - don't include trailing slash!
MIRROR="${MIRROR:-http://ftp-stud.hs-esslingen.de/pub/Mirrors/sources.redhat.com/cygwin}"

# System architecture.
ARCH="${ARCH:-$(uname -m)}"

# Localization is fine... as long as you don't show it to other people.
export LANG=C

if [ "$ARCH" != "x86_64" ]; then
  ARCH=x86
fi

# Crude test for other Cygwin processes running.
if [ "$1" != "--force" ]; then
  TTY=$(tty)
  test $(ps -al | grep -vE "\<${TTY##/dev/}\>" | wc -l) -gt 1 && {
    echo There\'s likely other processes running from Cygwin environment.
    echo Please stop them or use --force to suppress this test.
    exit 1
  }
else
  shift
fi

wget -N "http://cygwin.com/setup-${ARCH}.exe"

if [ "$1" = "ports" ]; then
  KEYS="-K http://cygwinports.org/ports.gpg -s ""${MIRROR%%/}ports/"
  shift
fi

./setup-${ARCH}.exe -O -s "${MIRROR%%/}/" $KEYS $* &

sleep 2
taskkill /IM "sh.exe" /F