install composer debian

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === 'e0012edf3e80b6978849f5eff0d4b4e4c79ff1609dd1e613307e16318854d24ae64f26d17af3ef0bf7cfb710ca74755a') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

# Some prerequisites (but not all of them)
apt-get install cmake
pip3 install pytest

# Clone, build and install 
git clone https://github.com/pybind/pybind11.git 
cd pybind11 
mkdir build 
cd build 
cmake .. 
make install

sudo apt updatesudo apt install wget php-cli php-zip unzip

sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer

wget -O composer-setup.php https://getcomposer.org/installer