FPM before-install script to install PyPI dependancies.

before-install.sh

#!/usr/bin/env bash

modules=( \
    daemonize \
    requests \
)

package_managers=( \
    pip \
    easy_install \
)

echo "Installing PyPI module dependencies..."

for p in "${package_managers[@]}"; do
    echo "Checking system for \"${p}\"..."

    if [ -x "$(command -v ${p})" ]; then
        echo "Found \"${p}\"." >&2

        p_args=''
        if [ "${p}" == 'pip' ]; then
            p_args='install'
        fi

        for m in "${modules[@]}"; do
            echo "Installing ${m} module..."
            ${p} ${p_args} ${m}

            if [ $? -eq 0 ]; then
                echo 'OK.'
            else
                echo "Failed to install \"${m}\" module via ${p}."
                exit 1
            fi
        done
        echo "Completed before-install tasks."
        exit 0
    else
        echo "\"${p}\" is not installed."
    fi
done

echo "Failed to find a PyPI package manager."
exit 1