#!/bin/bash
#
# This script gets ports from an overlay that need to be updated
#
# Note: Before execute this script you should be run 'ports -u' to be sure
# you're up to date

checkOverlayUpdates() {
  overlay=$1
  repo=${overlay/-arm*/}

  if [ "$overlay" == "$repo" ]; then
    echo "Error, $overlay is not a valid overlay"
    exit 1
  fi

  # check for existing repo
  case $repo in
    core|opt|xorg|contrib) ;;
    *) echo "Error, $repo is not a valid repo"; exit 1;;
  esac
  
  # obtain paths
  overlay_path=$(grep 'destination' /etc/ports/$overlay.{rsync,httpup} 2>/dev/null | cut -d'=' -f2)
  repo_path=$(grep 'destination' /etc/ports/$repo.{rsync,httpup} 2>/dev/null | cut -d'=' -f2)
  
  # foreach overlayed port check for updates available
  find $overlay_path -type f -name 'Pkgfile' -exec dirname {} \; | while read o_port; do
    port=$repo_path/$(basename $o_port)
    # get versions for both (port and o_port)
    . $port/Pkgfile
    port_version=$version-$release
    . $o_port/Pkgfile
    o_port_version=$version-$release
    if [ "$port_version" != "$o_port_version" ]; then
      printf "%-20s %10s %10s\n" $(basename $port) $o_port_version $port_version >> $TMP_FILE
    fi
  done
  
  if [ "$(wc -l $TMP_FILE)" != "0" ]; then
    printf "%-20s %10s %10s\n" "PORT" $overlay $repo
    cat $TMP_FILE && : > $TMP_FILE
    echo
  fi
}

if [ $# -lt 1 ]; then
  echo "Usage: $(basename $0) [repo_overlay]"
  exit 1
fi

TMP_FILE=$(mktemp)

for TARGET in $@; do
  checkOverlayUpdates $TARGET
done

rm -f $TMP_FILE

# End of file