singularity.def

# Build command:
#
#   singularity build fpm.simg singularity.def
#
# Execute instructions:
#
#   singularity exec fpm.simg fpm --version
#
Bootstrap: docker
From: alpine:3.7

%help

    Singularity container with Effing Package Management - FPM

%post

    apk add --no-cache \
        ruby \
        ruby-dev \
        gcc \
        libffi-dev \
        make \
        libc-dev \
        rpm
    gem install --no-ri --no-rdoc fpm