#!/bin/bash
LR_PKG_PATH="packages/libretro"
usage()
{
  echo ""
  echo "$0 <--all [--exclude list] | --used [--exclude list] | --packages list>"
  echo ""
  echo "Updates PKG_VERSION in package.mk of libretro packages to latest."
  echo ""
  echo "Parameters:"
  echo " -a --all                 Update all libretro packages"
  echo " -u --used                Update only libretro packages used by Lakka"
  echo " -p list --packages list  Update listed libretro packages"
  echo " -e list --exclude list   Update all/used packages except listed ones"
  echo ""
}

[ "$1" == "" ] && { usage ; exit ; }

case $1 in
  -a | --all )
    s=$1
    shift
    if [ "$1" != "" ] ; then
      case $1 in
        -e | --exclude )
          PACKAGES_EX=""
          x="$1"
          shift
          v="$@"
          [ "$v" == "" ] && { echo "Error: You must provide name(s) of package(s) to exclude after $x" ; exit 1 ; }
          for a in $v ; do
            if [ -f $LR_PKG_PATH/$a/package.mk ] ; then
              PACKAGES_EX="$PACKAGES_EX $a"
            else
              echo "Warning: $a is not a libretro package."
            fi
          done
          [ "$PACKAGES_EX" == "" ] && { echo "No valid packages to exclude given! Aborting." ; exit 1 ; }
          ;;
        * )
          echo "Error: After $s use only --exclude (-e) to exclude some packages."
          exit 1
          ;;
      esac
    fi
    # Get list of all libretro packages
    PACKAGES_ALL=`ls $LR_PKG_PATH`
    ;;
  -u | --used )
    s=$1
    shift
    if [ "$1" != "" ] ; then
      case $1 in
        -e | --exclude )
          PACKAGES_EX=""
          x="$1"
          shift
          v="$@"
          [ "$v" == "" ] && { echo "Error: You must provide name(s) of package(s) to exclude after $x" ; exit 1 ; }
          for a in $v ; do
            if [ -f $LR_PKG_PATH/$a/package.mk ] ; then
              PACKAGES_EX="$PACKAGES_EX $a"
            else
              echo "Warning: $a is not a libretro package."
            fi
          done
          [ "$PACKAGES_EX" == "" ] && { echo "No valid packages to exclude given! Aborting." ; exit 1 ; }
          ;;
        * )
          echo "Error: After $s use only --exclude (-e) to exclude some packages."
          exit 1
          ;;
      esac
    fi
    # Get list of cores, which are used with Lakka:
    OPTIONS_FILE="distributions/Lakka/options"
    [ -f "$OPTIONS_FILE" ] && source "$OPTIONS_FILE" || { echo "$OPTIONS_FILE: not found! Aborting." ; exit 1 ; }
    [ -z "$LIBRETRO_CORES" ] && { echo "LIBRETRO_CORES: empty. Aborting!" ; exit 1 ; }
    # List of core retroarch packages
    RA_PACKAGES="retroarch retroarch-assets retroarch-joypad-autoconfig retroarch-overlays libretro-database core-info glsl-shaders slang-shaders"
    # List of all libretro packages to update:
    PACKAGES_ALL=" $RA_PACKAGES $LIBRETRO_CORES "
    ;;
  -p | --packages )
    PACKAGES_ALL=""
    x="$1"
    shift
    v="$@"
    [ "$v" == "" ] && { echo "Error: You must provide name(s) of package(s) after $x" ; exit 1 ; }
    for a in $v ; do
      if [ -f $LR_PKG_PATH/$a/package.mk ] ; then
        PACKAGES_ALL="$PACKAGES_ALL $a "
      else
        echo "Warning: $a is not a libretro package - skipping."
      fi
    done
    [ "$PACKAGES_ALL" == "" ] && { echo "No valid packages given! Aborting." ; exit 1 ; }
    ;;
  * )
    usage
    echo "Unknown parameter: $1"
    exit 1
    ;;
esac
if [ "$PACKAGES_EX" != "" ] ; then
  for a in $PACKAGES_EX ; do
    PACKAGES_ALL=$(echo " "$PACKAGES_ALL" " | sed "s/\ $a\ /\ /g")
  done
fi
echo "Checking following packages: "$PACKAGES_ALL
declare -i i=0
for p in $PACKAGES_ALL
do
  f=$LR_PKG_PATH/$p/package.mk
  if [ ! -f "$f" ] ; then
    echo "$f: not found! Skipping."
    continue
  fi
  PKG_VERSION=`cat $f | sed -En "s/^PKG_VERSION=\"(.*)\"/\1/p"`
  PKG_SITE=`cat $f | sed -En "s/^PKG_SITE=\"(.*)\"/\1/p"`
  PKG_NAME=`cat $f | sed -En "s/^PKG_NAME=\"(.*)\"/\1/p"`
  PKG_GIT_BRANCH=`cat $f | sed -En "s/^PKG_GIT_CLONE_BRANCH=\"(.*)\"/\1/p"`
  if [ -z "$PKG_VERSION" ] || [ -z "$PKG_SITE" ] ; then
    echo "$f: does not have PKG_VERSION or PKG_SITE"
    echo "PKG_VERSION: $PKG_VERSION"
    echo "PKG_SITE: $PKG_SITE"
    echo "Skipping update."
    continue
  fi
  [ -n "$PKG_GIT_BRANCH" ] && GIT_HEAD="heads/$PKG_GIT_BRANCH" || GIT_HEAD="HEAD"
  UPS_VERSION=`git ls-remote $PKG_SITE | grep ${GIT_HEAD}$ | awk '{ print substr($1,1,7) }'`
  if [ "$UPS_VERSION" == "$PKG_VERSION" ]; then
    echo "$PKG_NAME is up to date ($UPS_VERSION)"
  else
    i+=1
    echo "$PKG_NAME updated from $PKG_VERSION to $UPS_VERSION"
    sed -i "s/$PKG_VERSION/$UPS_VERSION/" $f
  fi
done
echo "$i package(s) updated."