#!/bin/sh
#
# Copyright (c) 2024 Tomoaki AOKI
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

# Configurations

# Sapmple BLOCKLIST

BLOCKLISTS="japanese/libreoffice editors/libreoffice \
www/chromium www/firefox \
www/linux-widevine-cdm"

# Resulting and temporary directories/files

PORTSDIR=/usr/ports
LISTDIR=/poudriere
LISTFILE=pkglist.all
TMPDIR=/tmp
TMPFILE=${LISTFILE}-`id -u`-`date "+%Y%m%d%H%M%S"`

# Show users the output and temporary files, as they include
# user ID and date, thus, changes on every run by default.

echo Output = ${LISTDIR}/${LISTFILE}
echo Temporary = ${TMPDIR}/${TMPFILE}

# End configurations section.


# Cleanup old lists if exists, and rotate list.
# Users running this script must have permission to chmod them.

if [ -f ${LISTDIR}/${LISTFILE}.old ] ; then rm ${LISTDIR}/${LISTFILE}.old ; fi
if [ -f ${LISTDIR}/${LISTFILE} ] ; then mv ${LISTDIR}/${LISTFILE} ${LISTDIR}/${LISTFILE}.old ; fi
if [ -f ${LISTDIR}/${LISTFILE}.old ] ; then chmod 666 ${LISTDIR}/${LISTFILE}.old ; fi


# Generate list of all installed, not orphaned and not in BLOCKLIST ports.

for PORT in $( pkg query -a '%o' | sort -u )
do
  # Unset the flag to mark the port to be ignored for listing.
  FLG="NO"

  # Obtain list of flavors used on any of the pkg built with the port.
  FLAVOR=$( pkg info -A "${PORT}" | grep "flavor" | awk '{print $NF}' )

  # Cases without flavor used.
  if [ "x${FLAVOR}" = "x" ]
  then
    # Turn on the flag if the port is listed in BLOCKLIST.
    for NONEED in ${BLOCKLISTS} ; do
      if [ ${PORT} = ${NONEED} ] ; then FLG="YES" ; fi
    done

    # Turn on the flag if the port is listed in MOVED without successor.
    fgrep "${PORT}||" ${PORTSDIR}/MOVED > /dev/null
    RET=$?
    if [ 0 -eq $((RET)) ] ; then FLG="YES" ; fi

    # Write the port to temporary list if the flag is not set.
    if [ "NO" = ${FLG} ] ; then
      echo "${PORT}" >> ${TMPDIR}/${TMPFILE}
    fi
  else
    # Cases that flavors are used.
    # Variable FLAVOR can include multiple flavors, so loop
    # to handle all of them.
    for FLVR in ${FLAVOR}
    do
    # Turn on the flag if the port with and without the flavor
    # is listed in BLOCKLIST.
      for NONEED in ${BLOCKLISTS} ; do
        if [ ${PORT}@${FLVR} = ${NONEED} ] ; then FLG="YES" ; fi
        if [ ${PORT} = ${NONEED} ] ; then FLG="YES" ; fi
      done

    # Turn on the flag if the port with and without the flavor
    # is listed in MOVED without successor.
      fgrep "${PORT}||" ${PORTSDIR}/MOVED > /dev/null
      RET=$?
      if [ 0 -eq $((RET)) ] ; then FLG="YES" ; fi
      fgrep "${PORT}@${FLVR}||" ${PORTSDIR}/MOVED > /dev/null
      RET=$?
      if [ 0 -eq $((RET)) ] ; then FLG="YES" ; fi

    # Write the port with and without the flavor to temporary list
    # if the flag is not set.
      if [ "NO" = ${FLG} ] ; then
        echo "${PORT}@${FLVR}" >> ${TMPDIR}/${TMPFILE}
      fi
    done
  fi
done

# Finish the list to be unique lines only.
sort ${TMPDIR}/${TMPFILE} | uniq > ${LISTDIR}/${LISTFILE}
chmod 666 ${LISTDIR}/${LISTFILE}
rm ${TMPDIR}/${TMPFILE}