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#!/bin/bash 
#===============================================================================
#
#          FILE: install-nghdl.sh
# 
#         USAGE: ./install-nghdl.sh 
# 
#   DESCRIPTION: It is installation script for ngspice and ghdl work (nghdl). 
# 
#       OPTIONS: ---
#  REQUIREMENTS: ---
#          BUGS: ---
#         NOTES: ---
#        AUTHOR: Fahim Khan , fahim.elex@gmail.com
#  ORGANIZATION: eSim, FOSSEE group at IIT Bombay
#       CREATED: Tuesday 02 December 2014 17:01
#      REVISION:  ---
#===============================================================================

ngspice="ngspice-26"
src_loc=".esim-nghdl"
config_file="config.ini"
cur_dir=`pwd`

#Will be used to take backup of any file
sysdate="$(date)"
timestamp=`echo $sysdate|awk '{print $3"_"$2"_"$6"_"$4 }'`


#All functions goes here
function addghdlPPA
{
        echo "Adding ghdl PPA to install latest ghdl version"
        sudo add-apt-repository ppa:pgavin/ghdl
        sudo apt-get update
}

function installDependency
{
        echo "Installing ghdl.................................."
        sudo apt-get install -y ghdl
        echo "Installing flex.................................."
        sudo apt-get install -y flex
        echo "Installing bison................................."
        sudo apt-get install -y bison
}

echo "Enter proxy details if you are connected to internet thorugh proxy"

echo -n "Is your internet connection behind proxy? (y/n): "
read getProxy
if [ $getProxy == "y" -o $getProxy == "Y" ];then
        echo -n 'Proxy hostname :'
        read proxyHostname

        echo -n 'Proxy Port :'
        read proxyPort

        echo -n username@$proxyHostname:$proxyPort :
        read username

        echo -n 'Password :'
        read -s passwd

        unset http_proxy
        unset https_proxy
        unset HTTP_PROXY
        unset HTTPS_PROXY
        unset ftp_proxy
        unset FTP_PROXY

        export http_proxy=http://$username:$passwd@$proxyHostname:$proxyPort
        export https_proxy=http://$username:$passwd@$proxyHostname:$proxyPort
        export HTTP_PROXY=http://$username:$passwd@$proxyHostname:$proxyPort
        export HTTPS_PROXY=http://$username:$passwd@$proxyHostname:$proxyPort
        export ftp_proxy=http://$username:$passwd@$proxyHostname:$proxyPort
        export FTP_PROXY=http://$username:$passwd@$proxyHostname:$proxyPort

        echo "Install with proxy"
        #Calling functions
        addghdlPPA
        installDependency

elif [ $getProxy == "n" -o $getProxy == "N" ];then
        echo "Install without proxy"

        #Calling functions
        addghdlPPA
        installDependency

        if [ $? -ne 0 ];then
                echo -e "\n\n\nERROR: Unable to install required packages. Please check your internet connection.\n\n"
                exit 0
        fi

else
        echo "Please select the right option"
        exit 0

fi

#Checking if ngspice-26 directory is already present in Home directory
if [ -d $HOME/$ngspice ];then
        echo "$ngspice directory already exist taking its backup"
        mv $HOME/$ngspice $HOME/$ngspice.$timestamp
fi


#Extracting Ngspice to Home Directory
tar -xzvf $ngspice.tar.gz -C $HOME

if [ "$?" == 0 ];then 
    echo "Ngspice extracted sucessfuly to $HOME "
    #change to ngspice-26 directory
    cd $HOME/$ngspice
    #Make local install directory
    mkdir -p install_dir
    #Make release directory for build
    mkdir -p release
    #Change to release directory
    cd release
    echo "Installing Ngspice....."
    echo "------------------------------------"  
    sleep 5
    ../configure --enable-xspice --disable-debug  --prefix=$HOME/$ngspice/install_dir/ --exec-prefix=$HOME/$ngspice/install_dir/    
    make
    make install
    if [ "$?" == 0 ];then
        echo "Ngspice Installed sucessfully"
    else 
        echo "There was some error in installing ngspice"
    fi

else 
    echo "Unable to extract ngspice tar file"
    exit 1;
fi




#Creating directory to put source 
if [ -d "$HOME/$src_loc" ];then
    echo "(.)esim-nghdl directory already in $HOME,removing it and copying new code"
    rm -rf ~/$src_loc
    mkdir -p ~/$src_loc
else
    mkdir -p ~/$src_loc
fi

#Change to current directory
cd $cur_dir
cp -rv src/* ~/$src_loc/

#Copying LICENSE file
cp LICENSE ~/$src_loc/

#Creating config.ini file and adding configuration information

cd ~/$src_loc/
touch $config_file

echo "[NGSPICE]" >> $config_file
echo "NGSPICE_HOME = $HOME/$ngspice" >> $config_file
echo "DIGITAL_MODEL = %(NGSPICE_HOME)s/src/xspice/icm/ghdl" >> $config_file
echo "RELEASE = %(NGSPICE_HOME)s/release" >> $config_file


## Creating softlink 
cd /usr/local/bin
if [[ -L nghdl ]];then
    echo "Symlink was already present"
    sudo unlink nghdl
    sudo ln -sf ~/$src_loc/ngspice_ghdl.py nghdl

else
    echo "Creating synmlink"
    sudo ln -sf ~/$src_loc/ngspice_ghdl.py nghdl
fi