Docker container which provides a Lua interpreter with access to luarocks; uses alpine linux as the base image

alpine-lua

#!/usr/bin/env ash

read -r -d '' PROMPT_LUA << EOM
    _PROMPT = '[alpine-lua]# '

    luarocks =
    {
        install = function(pkg)
            return os.execute('luarocks install ' .. pkg)
        end
    }

    print('> Call luarocks.install() to add packages, e.x. luarocks.install(\"luasocket\")')
EOM

lua -e "${PROMPT_LUA}" -i "$@"

dockerfile

####################################################################################################
# apline-lua docker env: run with `docker build . -t alpine-lua && docker run -it --rm alpine-lua` #
####################################################################################################

FROM alpine

ARG LUA_VER="5.3.5"
ARG LUA_ROCKS_VER="3.0.0"

# required packages to build lua and run luarocks
RUN apk add libc-dev readline readline-dev gcc make wget

# install lua
RUN cd /tmp \
    && wget https://www.lua.org/ftp/lua-${LUA_VER}.tar.gz \
    && tar zxf lua-${LUA_VER}.tar.gz \
    && cd lua-${LUA_VER} \
    && make linux install \
    && cd /tmp \
    && rm -rf /tmp/*

# install luarocks
RUN cd /tmp \
    && wget https://luarocks.org/releases/luarocks-${LUA_ROCKS_VER}.tar.gz \
    && tar zxf luarocks-${LUA_ROCKS_VER}.tar.gz \
    && cd luarocks-${LUA_ROCKS_VER} \
    && ./configure \
    && make build \
    && make install \
    && cd /tmp \
    && rm -rf /tmp/*

COPY md5sum /usr/bin
COPY alpine-lua /usr/bin

ENTRYPOINT [ "alpine-lua" ]

md5sum

#!/usr/bin/env ash

################################################################
# Workaround for lack of version flag in busybox md5sum applet #
################################################################

if [ "$1" = "--version" ]; then
    busybox --help || true          # ignore non-zero exit code
    exit 0                          # emulate md5sum's '--version' exit code
fi

busybox md5sum "$@"                 # pass all arguments to busybox applet