#!/bin/sh
#
######################################################
# Build script                                       #
#                                                    #
# See .info for details                              #
######################################################

######################################################
# Make sure Dependencies for Script are loaded       #
######################################################
tce-load -i compiletc squashfs-tools git


######################################################
# Configure extension creation parameters            #
######################################################

WRKDIR=wiringPi
EXTNAM=wiringpi
TMPDIR=/tmp/wiringpi

######################################################
# Prepare extension creation                         #
######################################################

# Remove dirs and files left from previous creation

rm -r -f $WRKDIR

rm -r -f $TMPDIR
rm -r -f $TMPDIR-doc
rm -r -f $TMPDIR-dev

# Crete temporary directory

mkdir -p $TMPDIR

######################################################
# Compile extension                                  #
######################################################

# Export variables needed for compilation

export CFLAGS="-O2 -pipe -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp"
export CXXFLAGS="-O2 -pipe -fno-exceptions -fno-rtti -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp"
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/lib/pkgconfig


git clone --depth 1 git://git.drogon.net/wiringPi

# Patch it

cd $WRKDIR
patch -p1 < ../i2cdetect.patch

echo "Pause, to validate patch.  If patch failes, open another shell and fix before continuing"
read key

# Compile

# Build script fails if this directory does not exist
[ -d /usr/local/include ] || sudo mkdir -p /usr/local/include

touch /tmp/mark
# Build will compile and install all
./build
# Make static Library for libwiringPi
cd wiringPi
make static
sudo make install-static
cd ..


# Install in base temp dir

mkdir -p $TMPDIR
find /usr/local -newer /tmp/mark -not -type d > /tmp/tmp.lst
tar -T /tmp/tmp.lst -cf /tmp/tmp.tar
tar -C $TMPDIR -xf /tmp/tmp.tar
sudo chown root.root $TMPDIR/usr/local/bin/gpio
sudo chmod u+s $TMPDIR/usr/local/bin/gpio


# Delete compilation work directory

cd ..
rm -r -f $WRKDIR

# Adjust directory access rigths

find $TMPDIR/ -type d | sudo xargs chmod -v 755

# Strip executables

find $TMPDIR | xargs file | grep ELF | cut -f 1 -d : | sudo xargs strip --strip-unneeded

# Move files to doc extension

mkdir -p $TMPDIR-doc/usr/local/share
mv $TMPDIR/usr/local/man $TMPDIR-doc/usr/local/share

# Move files to dev extension

mkdir -p $TMPDIR-dev/usr/local/lib
mv $TMPDIR/usr/local/include $TMPDIR-dev/usr/local
mv $TMPDIR/usr/local/lib/*.a $TMPDIR-dev/usr/local/lib
mv $TMPDIR/usr/local/lib/*.la $TMPDIR-dev/usr/local/lib
mv $TMPDIR/usr/local/lib/pkgconfig $TMPDIR-dev/usr/local/lib

###################################################
# Create base extension in temp dir               #
###################################################

cd $TMPDIR
cd ..
mksquashfs $TMPDIR $EXTNAM.tcz -all-root -noappend
cd $TMPDIR
find usr -not -type d > $EXTNAM.tcz.list 
mv ../$EXTNAM.tcz .

# Create md5 file

md5sum $EXTNAM.tcz > $EXTNAM.tcz.md5.txt

# Cleanup temp directory

sudo rm -r -f usr

###################################################
# Create doc extension in temp dir                #
###################################################

cd $TMPDIR-doc
cd ..
mksquashfs $TMPDIR-doc $EXTNAM-doc.tcz -all-root -noappend
cd $TMPDIR-doc
find usr -not -type d > $EXTNAM-doc.tcz.list
mv ../$EXTNAM-doc.tcz .

# Create md5 file

md5sum $EXTNAM-doc.tcz > $EXTNAM-doc.tcz.md5.txt

# Cleanup temp directory

sudo rm -r -f usr

###################################################
# Create dev extension in temp dir                #
###################################################

cd $TMPDIR-dev
cd ..
mksquashfs $TMPDIR-dev $EXTNAM-dev.tcz -all-root -noappend
cd $TMPDIR-dev
find usr -not -type d > $EXTNAM-dev.tcz.list
mv ../$EXTNAM-dev.tcz .

# Create md5 file

md5sum $EXTNAM-dev.tcz > $EXTNAM-dev.tcz.md5.txt

# Cleanup temp directory

sudo rm -r -f usr