#!/bin/bash
#
# ELS script to build jpeg-8b. 
#
# jpeg is a library for manipulating images in the JPEG format.
# It is required by the cups, ImageMagick and jasper packages
# and possibly others.
#
# Source code is from http://www.ijg.org/files/jpegsrc.v8b.tar.gz
#
#
# This script is public domain software and may be freely copied.
#
# This script is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
#
# Define the package name, source directory, build directory and
# staging directory paths.  Prefixes to directories may be overridden
# by setting shell variables SRC, BUILD and STAGING.  For example,
# doing "export SRC=/root/foo" before calling this script will override
# the default /usr/src and set SRC_DIR to /root/foo/$PKG_NAME instead.
#
PKG_NAME=$(basename $0)
SRC_DIR=${SRC:-/usr/src}/$PKG_NAME
BUILD_DIR=${BUILD:-/var/tmp/build}/$PKG_NAME
STAGING_DIR=${STAGING:-/var/tmp/staging}/$PKG_NAME

# Check that the source directory really exists and bail out if not.
if ! [ -d $SRC_DIR ]; then
  echo "$PKG_NAME: Cannot find source code directory $SRC_DIR."
  exit 1
fi

# Do not overwrite existing build directory.
if [ -d $BUILD_DIR ]; then
  echo "$PKG_NAME: Build directory $BUILD_DIR already exists."
  exit 2
else
  mkdir -p $BUILD_DIR
fi

# Do not overwrite existing staging directory.
if [ -d $STAGING_DIR ]; then
  echo "$PKG_NAME: Staging directory $STAGING_DIR already exists."
  exit 4
else
  mkdir -p $STAGING_DIR
fi

# This is not one of the packages that can be configured and built
# completely outside of the source tree.  So in order to leave the
# original source untouched, the contents of $SRC_DIR are first copied
# to $BUILD_DIR.  The copy in $BUILD_DIR is then modified to suit the
# configuration.
cp -dpR $SRC_DIR/* $BUILD_DIR

# Configure the package for FHS compliance and i586 processor.
export CC="gcc -march=i586"
cd $BUILD_DIR
./configure \
  --build=i586-pc-linux-gnu \
  --enable-shared \
  --enable-static \
  --mandir=/usr/share/man \
  --prefix=/usr

# Check return status and bail out if it's non-zero.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Configuration failed!"
  exit 8
fi

# Build the package.
make

# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Build failed!"
  exit 16
fi

# Install into the staging area.
make DESTDIR=$STAGING_DIR install

# Check return code and bail if it looks bad.
if [ $? -gt 0 ]; then
  echo "$PKG_NAME: Installation to staging area failed!"
  exit 32
fi

# Keep a copy of the license document.
install -D -o root -g root -m 644 $SRC_DIR/README \
  $STAGING_DIR/usr/share/doc/$PKG_NAME/LICENSE

# Strip binaries and libraries and compress documentation to save space.
strip $STAGING_DIR/usr/bin/*
strip --strip-debug $STAGING_DIR/usr/lib/*
gzip -r $STAGING_DIR/usr/share/man
gzip -r $STAGING_DIR/usr/share/doc

# Create the package
if ! [ "$PKG_COMMAND" = "" ]; then
  export $PKG_NAME $STAGING_DIR
  $PKG_COMMAND
else
  cd $STAGING_DIR
  tar -zcf ../$PKG_NAME.i586.tar.gz *
fi

# end of blueprint