#! /usr/bin/env bash
# Copyright 2012 Adam Green (http://mbed.org/users/AdamGreen/)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


# Logs the command to be run and then executes the command while logging the results.
RunAndLog () {
    echo `date` Executing $@>>$LOGFILE
    $@ 1>>$LOGFILE 2>$ERRORFILE
    if [ "$?" != "0" ] ; then
        cat $ERRORFILE >>$LOGFILE
        echo `date` Failure forced early exit>>$LOGFILE
        cat $LOGFILE
        rm -f $ERRORFILE
        popd >/dev/null
        read -n 1 -sp "Press any key to continue..." dummy ; echo
        exit 1
    fi
}


# Setup script variables.
ROOTDIR=$0
ROOTDIR=${ROOTDIR%/*}
pushd $ROOTDIR
ROOTDIR=$PWD
LOGFILE=$ROOTDIR/linux_install.log
ERRORFILE=$ROOTDIR/linux_install.err
GCC4ARM_VERSION=gcc-arm-none-eabi-4_8-2014q1
GCC4ARM_FILENAME=gcc-arm-none-eabi-4_8-2014q1-20140314-linux.tar.bz2
GCC4ARM_URL=https://launchpad.net/gcc-arm-embedded/4.8/4.8-2014-q1-update/+download/$GCC4ARM_FILENAME
GCC4ARM_TAR=$ROOTDIR/$GCC4ARM_FILENAME
GCC4ARM_MD5=72b0d06ae16b303c25fd70b2883d3950
GCC4ARM_EXTRACT=$ROOTDIR/$GCC4ARM_VERSION
GCC4ARM_DIR=$ROOTDIR/gcc-arm-none-eabi
GCC4ARM_BINDIR=$GCC4ARM_DIR/bin
BUILDSHELL_CMD=$ROOTDIR/BuildShell


echo Logging install results to $LOGFILE
echo `date` Starting $0 $*>$LOGFILE

echo Downloading GNU Tools for ARM Embedded Processors...
rm $GCC4ARM_FILENAME >/dev/null 2>/dev/null
echo `date` Executing wget $GCC4ARM_URL>>$LOGFILE
wget $GCC4ARM_URL

echo Validating md5 signature of GNU Tools for ARM Embedded Processors...
echo `date` Validating md5 signature of GNU Tools for ARM Embedded Processors>>$LOGFILE
archive_match=`md5sum $GCC4ARM_FILENAME | grep -c $GCC4ARM_MD5`
if [ "$archive_match" != "1" ] ; then
    echo $GCC4ARM_FILENAME failed MD5 signature check.>>$LOGFILE
    echo `date` Failure forced early exit>>$LOGFILE
    cat $LOGFILE
    rm -f $ERRORFILE
    popd >/dev/null
    read -n 1 -sp "Press any key to continue..." dummy ; echo
    exit 1
fi

echo Extracting GNU Tools for ARM Embedded Processors...
rm -r $GCC4ARM_DIR >/dev/null 2>/dev/null
RunAndLog tar xf $GCC4ARM_TAR
RunAndLog mv $GCC4ARM_EXTRACT $GCC4ARM_DIR

echo Cleaning up intermediate files...
RunAndLog rm $GCC4ARM_TAR
echo Installed build tools to $GCC4ARM_DIR