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#!/bin/sh
# $Id$
# Copyright (c) 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:        linux-uvc
# Descr:      USB Video Class Linux device driver
# URL:        http://linux-uvc.berlios.de/
# Needs:      
# Changelog:  
# 20080604-1: 04/Jun/2008 by Eric Hameleers <alien@slackware.com>
#             * Initial build.
# 
# Run 'sh linux-uvc.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=linux-uvc
VERSION=${VERSION:-20080604}
ARCH=${ARCH:-i486}
BUILD=${BUILD:-1}
TAG=${TAG:-alien}

DOCS="dynctrl.txt"

# 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}
MODCONFFILE=modprobe.conf

# If you want automatic download to work, supply a URL for 'SRCURL' below:
SOURCE="$SRCDIR/${PRGNAM}-${VERSION}.tar.gz"
SRCURL=""

# This function checks out sources from SVN/CVS and creates a tarball of them.
src_checkout() {
  # Param #1 : full path to where SOURCE tarball should be created.
  if [ "$(echo ${VERSION}|cut -c1)" == 'r' ]; then # revision instead of date
    REV=$(echo ${VERSION} | cut -c2-)
  else
    REV="{${VERSION}}"
  fi
  mkdir $PRGNAM-${VERSION} \
    && cd $PRGNAM-${VERSION} \
    && svn checkout --revision $REV svn://svn.berlios.de/linux-uvc/linux-uvc/trunk . \
    && chown -R root:root . \
    && cd .. \
    && tar -jcf ${1} $PRGNAM-${VERSION} \
    && rm -rf $PRGNAM-${VERSION}
}

##
## --- 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 "$ARCH" in
  i486)      SLKCFLAGS="-O2 -march=i486 -m${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 $OUTPUT          # place for the package to be saved
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build

# Source file availability:
if ! [ -f ${SOURCE} ]; then
  echo "Source '$(basename ${SOURCE})' not available yet..."
  # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
  [ -w "$SRCDIR" ] || SOURCE="$OUTPUT/$(basename $SOURCE)"
  if ! [ "x${SRCURL}" == "x" ]; then
    echo "Will download file to $(dirname $SOURCE)"
    if ! $(wget -nv -T 20 -O "${SOURCE}" "${SRCURL}"); then
      echo "Downloading '$(basename ${SOURCE})' failed... aborting the build."
      mv -f "${SOURCE}" "${SOURCE}".FAIL
      exit 1
    fi
  else
    # Try if we have a SVN/CVS download routine for ${SOURCE}
    echo "Attempting checkout of sources to `dirname $SOURCE`"
    src_checkout "${SOURCE}"
  fi
  if [ ! -f "${SOURCE}" -o ! -s "${SOURCE}" ]; then
    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}
chown -R root:root .
chmod -R u+w,go+r-w,a-s .

echo Building ...
export LDFLAGS="$SLKLDFLAGS"
export CXXFLAGS="$SLKCFLAGS"
export CFLAGS="$SLKCFLAGS"
make INSTALL_MOD_DIR=kernel/drivers/usb/media \
  2>&1 | tee $OUTPUT/make-${PRGNAM}.log

make INSTALL_MOD_DIR=kernel/drivers/usb/media INSTALL_MOD_PATH=$PKG install \
  2>&1 |tee $OUTPUT/install-${PRGNAM}.log

# 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

	# Determine the rc.modules to use:
	if [ -f etc/rc.d/rc.modules.local ]; then
	  RCMODULES="etc/rc.d/rc.modules.local"
	elif [ -f etc/rc.d/rc.modules-$(uname -r) ]; then
	  RCMODULES="etc/rc.d/rc.modules-$(uname -r)"
	else
	  RCMODULES="etc/rc.d/rc.modules"
	fi
	
	# Make sure the module gets loaded on boot:
	if ! grep -q "uvcvideo" \${RCMODULES} ; then
	  echo "" >> \${RCMODULES}
	  echo "# Load the UVC video kernel module" >> \${RCMODULES}
	  echo "/sbin/modprobe uvcvideo" >> \${RCMODULES}
	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
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
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
if [ -f $PKG/install/slack-required ]; then
  cat $PKG/install/slack-required > $OUTPUT/${PRGNAM}-${VERSION}_$(echo $KVER | tr - _)-${ARCH}-${BUILD}${TAG}.dep
fi

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