Thin wrapper around pip that manages your requirements file.

mpip.sh

# licensed under the UNLICENSE https://unlicense.org/

mpip() {
    if [[ "$1" == "install" ]]; then
        touch requirements.txt
        local old_req="$(< requirements.txt)"
        local new_req="$old_req"
        shift 1
        local install_list=($@)
        python -m pip install "$@"
        if [[ "$?" == "1" ]]; then
            return 1
        fi
        local currently_installed="$(pip freeze)"
        # remove newly installed from the requirements list
        for req in "${install_list[@]}"
        do
            local req_base_name=$(python -c "print(\"$req\".split(\"==\")[0])")
            local req_full_name=$(echo "$currently_installed" | grep -pie "^$req_base_name==")
            new_req="$(echo "$new_req" | grep -vpie "^$req_base_name\$" | grep -vpie "^$req_full_name\$")"
        done
        # add updated versions to the requirements list
        for req in "${install_list[@]}"
        do
            local req_base_name=$(python -c "print(\"$req\".split(\"==\")[0])")
            local req_full_name=$(echo "$currently_installed" | grep -pie "^$req_base_name==")
            new_req="$(echo "$new_req" | grep -vpie "^$req_base_name\$" | grep -vpie "^$req_full_name\$")\n$req_full_name"
        done
        echo -e "$new_req" | sort > requirements.txt
        return
    fi
    python -m pip $@
}