#!/usr/bin/env bash
#
# A very cheesy script to prep a release
#
set -e

PRODUCT=tripwire
VERSION=2.4.3.0

platform() {
  case `uname` in
    Darwin) echo 'osx' ;;
    Linux) echo 'linux' ;;
    FreeBSD) echo 'freebsd' ;;
    *) echo 'unknown' ;;
  esac
}


arch() {
  case "$1" in
    osx|freebsd|linux)
      if file bin/tripwire | grep -q '64-bit'; then
        echo 'x86_64'
      else
        echo 'x86'
      fi
      ;;
    *) echo 'unknown'
  esac
}

PLATFORM=$(platform)
ARCH=$(arch $PLATFORM)
TYPE=bin
ROOT_DIR=$PRODUCT-$VERSION-$PLATFORM-$ARCH-$TYPE
EXCLUDES='.svn .git .gitignore'



EXCLUDES="$(for EXCLUDE in $EXCLUDES; do echo --exclude $EXCLUDE; done)"

SCRIPT_DIR="$(cd `dirname $0`; pwd)"
SCRIPT_DIR_DOTDOT="$(dirname "$SCRIPT_DIR")"

if ! test -x bin/tripwire* ; then
  echo "tripwire not ready for release (bins not found in bin/ dir)" >&2
  exit 1
fi

trap 'RESULT=$?; rm -rf "$SCRIPT_DIR_DOTDOT/releases/$ROOT_DIR"; exit $RESULT' INT QUIT EXIT TERM ERR

mkdir -p "$SCRIPT_DIR_DOTDOT/releases"
cd "$SCRIPT_DIR_DOTDOT/releases"
mkdir "$ROOT_DIR"
ln -s ../bin ../contrib ../man ../policy $ROOT_DIR/
ln -s ../COPYING ../ChangeLog ../Packaging ../ReadMe-2.4.3 ../MAINTAINERS $ROOT_DIR/
ln -s ../TRADEMARK ../COMMERCIAL ../install ../install-sh $ROOT_DIR/

EXTENSIONS=(tar.bz2 tar.gz tar.xz)
TAR_OPTIONS=(j z J)

sha1() {
  sha1sum "$@" || shasum "$@"
}

sha512() {
  sha512sum "$@" || shasum -a 512 "$@"
}

sign() {
  if which gpg >/dev/null 2>&1; then
    gpg --detach-sign --output "$1.asc" "$1"
  else
    echo "gpg unavailable, release is unsigned !!" >&2
    exit 1
  fi
}

for INDEX in 1 2 3; do
  EXTENSION="${EXTENSIONS[$INDEX]}"
  TAR_OPTIONS="${TAR_OPTIONS[$INDEX]}"
  TARBALL="$ROOT_DIR.${EXTENSION}"

  tar $EXCLUDES -${TAR_OPTIONS}hcf $TARBALL $ROOT_DIR

  sha1 $TARBALL > $ROOT_DIR.sha1
  sha1 bin/* >> $ROOT_DIR.sha1

  sha512 $TARBALL > $ROOT_DIR.sha512
  sha512 bin/* >> $ROOT_DIR.sha512

  # sign the tarball
  sign $TARBALL

  # sign the hashes
  sign $ROOT_DIR.sha1
  sign $ROOT_DIR.sha512
done