opencv_setup.sh

#!/bin/bash

# Variables
INSTALL_PREFIX=/usr/local
COMPILE_DIR=~/.build/opencv_compile
JOBS=3

# Change directories to wherever you want to compile opencv
mkdir -p $COMPILE_DIR
cd $COMPILE_DIR

echo -e "\n\n[WARNING] Make sure to install the correct dependiencies: build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev\n\n"
echo -e "[INFO] Compile directory: $COMPILE_DIR"
echo -e "[INFO] Install directory: $INSTALL_PREFIX"

# Clone the two projects
echo "[INFO] I am cloning 2 repo's at once so the output might be a little buggy"
git clone --depth 1 https://github.com/opencv/opencv.git &
git clone --depth 1 https://github.com/opencv/opencv_contrib.git

# Wait for jobs to finish
wait

# Change directories into the OpenCV folder
cd opencv
# Go into the build folder
mkdir build
cd build

# Setup the build scripts
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX -DOPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules/ -DBUILD_opencv_java=OFF -DBUILD_opencv_python=OFF -DOPENCV_ENABLE_NONFREE=YES ..


# Show warnings
echo -e '\n\n[WARNING] Make sure you have more than the default amount of memory and swap memory by default on a pi (1 GB and 100 MB)'
echo -e 'I recommend 1 Gb of swap space. A good example of how to manipulate swap can be found here:'
echo -e 'https://wiki.archlinux.org/index.php/swap#Swap_file\n\n'

# Compile everything
make -j$JOBS