#!/bin/sh
# $Id$
# Copyright (c) 2007-2008 Eric Hameleers <alien@slackware.com>
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   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.
# -----------------------------------------------------------------------------
#
# Slackware SlackBuild script 
# ===========================
# By:        Eric Hameleers <alien@slackware.com>
# For:       gspcav1
# Descr:     gspcav1 video for linux 'v4l' driver
# URL:       http://mxhaard.free.fr/
# Needs:     Linux kernel >= 2.6.11
# Changelog:
# 20061216-1: 09/Jan/2007 by Eric Hameleers <alien@slackware.com>
#             * Initial build (driver version 1.00.11).
# 20070110-1: 11/Jan/2007 by Eric Hameleers <alien@slackware.com>
#             * Update to driver version 1.00.12
# 20070508-1: 26/may/2007 by Eric Hameleers <alien@slackware.com>
#             * Update to driver version 1.00.18
# 20070508-2: 17/Oct/2007 by Eric Hameleers <alien@slackware.com>
#             * Small changes to SlackBuild.
# 20071224-2: 30/dec/2007 by Eric Hameleers <alien@slackware.com>
#             * Update to driver version 1.00.20
# 
# Run 'sh gspcav1.SlackBuild --cleanup' to build a Slackware package.
# The package (.tgz) plus descriptive .txt file are created in /tmp .
# Install using 'installpkg'. 
#
# -----------------------------------------------------------------------------

# Set initial variables:

PRGNAM=gspcav1
VERSION=${VERSION:-20071224}
ARCH=${ARCH:-i486}
BUILD=${BUILD:-1}
TAG=${TAG:-alien}

DOCS="READ_AND_INSTALL changelog"

# Do we add debug code to the driver? If not 'NO', we'll add it.
DEBUG=${DEBUG:-NO}

# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

# Place to build (TMP) package (PKG) and output (OUTPUT) the program:
TMP=${TMP:-/tmp/build}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

# Kernel module related parameters:
KVER=${KVER:-$(uname -r)}
KSRC=${KSRC:-/lib/modules/${KVER}/build}

# Input URL: http://mxhaard.free.fr/spca50x/Download/gspcav1-20070508.tar.gz
SOURCE="$SRCDIR/${PRGNAM}-${VERSION}.tar.gz"
SRCURL="http://mxhaard.free.fr/spca50x/Download/${PRGNAM}-${VERSION}.tar.gz"

##
## --- with a little luck, you won't have to edit below this point --- ##
##

# Exit the script on errors:
set -e
trap 'echo "$0 FAILED at line $LINENO!" | tee $OUTPUT/error-${PRGNAM}.log' ERR
# Catch unitialized variables:
set -u
P1=${1:-1}

# Slackware 11 and up need other option (gcc > 3.3.x)
if [ $(gcc -dumpversion | tr -d  '.' |cut -c 1-2) -gt 33 ]; then
  MOPT=tune
else
  MOPT=cpu
fi

case "$ARCH" in
  i386)      SLKCFLAGS="-O2 -march=i386 -m${MOPT}=i686"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  i486)      SLKCFLAGS="-O2 -march=i486 -m${MOPT}=i686"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  s390)      SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  powerpc)   SLKCFLAGS="-O2"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
  x86_64)    SLKCFLAGS="-O2 -fPIC"
             SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
             ;;
  athlon-xp) SLKCFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"
             SLKLDFLAGS=""; LIBDIRSUFFIX=""
             ;;
esac

# Create working directories:
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
mkdir -p $OUTPUT          # place for the package to be saved

# Source file availability:
if ! [ -f ${SOURCE} ]; then
  if ! [ "x${SRCURL}" == "x" ]; then
    # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
    [ -w "$SRCDIR" ] || SOURCE="$OUTPUT/$(basename $SOURCE)"
    echo "Source '$(basename ${SOURCE})' not available yet..."
    echo "Will download file to $(dirname $SOURCE)"
    wget -nv -T 20 -O "${SOURCE}" "${SRCURL}" || true
    if [ $? -ne 0 -o ! -s "${SOURCE}" ]; then
      echo "Downloading '$(basename ${SOURCE})' failed... aborting the build."
      mv -f "${SOURCE}" "${SOURCE}".FAIL
      exit 1
    fi
  else
    echo "File '$(basename ${SOURCE})' not available... aborting the build."
    exit 1
  fi
fi

if [ "$P1" == "--download" ]; then
  echo "Download complete."
  exit 0
fi

# --- PACKAGE BUILDING ---

echo "++"
echo "|| $PRGNAM-$VERSION"
echo "++"

cd $TMP/tmp-$PRGNAM

echo "Extracting the source archive(s) for $PRGNAM..."
if $(file ${SOURCE} | grep -q ": bzip2"); then
  tar -xjvf ${SOURCE}
elif $(file ${SOURCE} | grep -q ": gzip"); then
  tar -xzvf ${SOURCE}
fi
cd ${PRGNAM}-${VERSION}
if [ $(echo $KVER | cut -d. -f2) -eq 6 -a $(echo $KVER | cut -d. -f3) -ge 27 ];
then
  # Compensate for kernel 2.6.27 changes:
  patch -p1 < $SRCDIR/gspca_kernel_2.6.27.diff
fi
if [ "$DEBUG" == "NO" ]; then
  # Set DEBUG="YES" up above if you need to debug the driver:
  patch -p0 < $SRCDIR/${PRGNAM}_nodebug.patch 2>&1 | tee $OUTPUT/patch-${PRGNAM}.log
fi
chown -R root:root .
chmod -R u+w,go+r-w,a-s .

echo Building ...
export LDFLAGS="$SLKLDFLAGS"
export CFLAGS="$SLKCFLAGS"
make KERNELVERSION=${KVER} KERNELDIR=${KSRC} 2>&1 | tee $OUTPUT/make-${PRGNAM}.log

# Install the kernel module:
mkdir -p $PKG/lib/modules/${KVER}/kernel/drivers/usb/media
install -c -m 644 gspca.ko $PKG/lib/modules/${KVER}/kernel/drivers/usb/media/

# Add this to the doinst.sh:
! [ -d $PKG/install ] && mkdir -p $PKG/install
cat <<-EEOOTT >> $PKG/install/doinst.sh
	# Only run depmod on matching running kernel
	# Slackware will run depmod anyway on reboot):
	MYMODVER=$KVER
	MYKERNEL=\`uname -r\`
	if [ "\$MYKERNEL" = "\$MYMODVER" ]; then
	  if [ -x sbin/depmod ]; then
	    chroot . /sbin/depmod -a \$MYKERNEL 1> /dev/null 2> /dev/null
	  fi
	fi

	EEOOTT

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION || true
cp -a $SRCDIR/$(basename $0) $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
find $PKG/usr/doc -type f -exec chmod 644 {} \;

# Add a package description:
mkdir -p $PKG/install
cat $SRCDIR/slack-desc > $PKG/install/slack-desc
if [ -f $SRCDIR/doinst.sh ]; then
  cat $SRCDIR/doinst.sh >> $PKG/install/doinst.sh
fi

# Build the package:
cd $PKG
makepkg --linkadd y --chown n $OUTPUT/${PRGNAM}-${VERSION}_$(echo $KVER | tr - _)-${ARCH}-${BUILD}${TAG}.tgz 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}_$(echo $KVER | tr - _)-${ARCH}-${BUILD}${TAG}.tgz > ${PRGNAM}-${VERSION}_$(echo $KVER | tr - _)-${ARCH}-${BUILD}${TAG}.tgz.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}_$(echo $KVER | tr - _)-${ARCH}-${BUILD}${TAG}.txt

# Clean up the extra stuff:
if [ "$P1" = "--cleanup" ]; then
  rm -rf $TMP/tmp-$PRGNAM
  rm -rf $PKG
fi