install_dependencies.sh

#!/bin/bash


help_install_dependencies="Usage:
./install_dependencies.sh [os_name]         default OS is linux
./install_dependencies.sh --help            displays help

os_name can be:
  - linux
  - osx

it installs the given dependencies:
  - bzip library                            bzip2-1.0.6
  - zlib library                            zlib-1.2.11

for linux:
./install_dependencies.sh linux

for mac os:
./install_dependencies.sh osx
"

if [ "$#" -eq 0 ]
then
    OS_NAME="linux"
elif [ "$#" -eq 1 ]
then
  if [[ "$1" == "--help" ]]
  then
      echo "$help_install_dependencies"
      exit
  elif [[ "$1" == "linux" ]]
  then
      OS_NAME="linux"
  elif [[ "$1" == "osx" ]]
  then
      OS_NAME="osx"
  else
    echo "$help_install_dependencies"
    exit
  fi
else
  echo "requires 1 argument at max"
  echo "$help_install_dependencies"
  exit
fi

dependencies_dir=$OS_NAME"_dependencies"

#check for already downloaded files
if [ -d "$dependencies_dir/bzip2-1.0.6" ]; then
  echo "skipping dependencies installation: $dependencies_dir directory found:"
  ls $dependencies_dir
  exit
fi


# Download ODB runtime library, sqlite DB plugin for ODB, libbz2 and libz.
echo "creating directory $dependencies_dir"
mkdir -p $dependencies_dir && cd $dependencies_dir

echo "installing libbz2"
# This is commented till the bzip.org site is recovered.
# wget http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz -O /tmp/libbz2.tar.gz
# tar zxvf /tmp/libbz2.tar.gz
# Till then we can trust ubuntu archives.
wget http://archive.ubuntu.com/ubuntu/pool/main/b/bzip2/bzip2_1.0.6.orig.tar.bz2 -O /tmp/libbz2.tar.bz2
tar jxvf /tmp/libbz2.tar.bz2
cd bzip2-1.0.6 && make && cd ..

echo "installing libz"
wget http://prdownloads.sourceforge.net/libpng/zlib-1.2.11.tar.gz?download -O /tmp/libz.tar.gz
tar zxvf /tmp/libz.tar.gz
cd zlib-1.2.11 && cmake . && make && cd ..


# Make easier to find the static libraries
cp bzip2-1.0.6/libbz2.a .
cp zlib-1.2.11/libz.a .

cd ..
echo "downloaded dependencies:"
ls $dependencies_dir