#!/bin/bash

# Copyright 2011, 2016, 2018, 2023  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=kernel-firmware
ARCH=noarch
BUILD=${BUILD:-1}
# Compress the firmware blobs?
# Default is "none" for no compression.
# Other types known to be currently supported are "xz" and "zstd".
COMPRESSION=${COMPRESSION:-none}

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  # Internally, git considers the repo date to be the date the last committed
  # patch was submitted. This is somewhat confusing, as it can lead to a newer
  # git clone having a date older than the last one we used. To avoid this
  # situation, we're going to deviate a little and use the date the HEAD
  # patch or merge occured as the repo date, rather than the date of the
  # patch itself.
  #DATE="$(lynx -dump -width=256 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=HEAD | grep "    author   " | head -n 1 | rev | cut -f 3 -d ' ' | rev | tr -d -)"
  DATE="$(lynx -dump -width=256 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=HEAD | grep "   committer " | head -n 1 | rev | cut -f 3 -d ' ' | rev | tr -d -)"
  HEADISAT="$(lynx -dump -width=256 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=HEAD | grep "    commit   " | head -n 1 | cut -f 2 -d ] | cut -b 1-7)"
  echo "$PKGNAM-${DATE}_${HEADISAT}-$ARCH-$BUILD.txz"
  exit 0
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM

rm -rf $PKG
mkdir -p $TMP $PKG

cd $PKG
git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
# Better determine these the same way as above.
DATE="$(lynx -dump -width=256 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=HEAD | grep "   committer " | head -n 1 | rev | cut -f 3 -d ' ' | rev | tr -d -)"
HEADISAT="$(lynx -dump -width=256 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=HEAD | grep "    commit   " | head -n 1 | cut -f 2 -d ] | cut -b 1-7)"
find . -name ".git*" -exec rm -rf "{}" \+
chown -R root:root .
mkdir -p lib/firmware

# Install the firmware from the download directory using "make $INSTALLTARGET":
case $COMPRESSION in
  xz) INSTALLTARGET="install-xz" ;;
  zstd) INSTALLTARGET="install-zst" ;;
  *) INSTALLTARGET="install" ;;
esac
( cd linux-firmware
  echo "Running make DESTDIR=$PKG ${INSTALLTARGET}..."
  make DESTDIR=$PKG $INSTALLTARGET 2> /dev/null
)
rm -rf linux-firmware

# Remove sources for carl9170fw:
( cd $PKG/lib/firmware
  if [ -d carl9170fw ]; then
    mv carl9170fw/COPYRIGHT COPYRIGHT.carl9170fw
    mv carl9170fw/GPL LICENSE.carl9170fw
    rm -rf carl9170fw
  fi
)

# Install documentation link:
mkdir -p $PKG/usr/doc
( cd $PKG/usr/doc
  ln -sf /lib/firmware kernel-firmware-${DATE}_${HEADISAT}
)

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-${DATE}_${HEADISAT}-$ARCH-$BUILD.txz