first save up

Dockerfile

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+FROM ubuntu:16.04
+MAINTAINER sparklyballs
+
+# set version label
+ARG BUILD_DATE
+ARG VERSION
+LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
+
+# environment variables
+ARG DEBIAN_FRONTEND="noninteractive"
+
+# build packages as variable
+ARG BUILD_PACKAGES="\
+	cabal-install \
+	git"
+
+# install build packages
+RUN \
+ apt-get update && \
+ apt-get install -y \
+	$BUILD_PACKAGES && \
+
+# compile shellcheck
+ cabal update && \
+ git clone https://github.com/koalaman/shellcheck \
+	/tmp/shellcheck && \
+ cd /tmp/shellcheck && \
+ cabal install && \
+ export OLDPATH="$PATH" && \
+ export PATH="/root/.cabal/bin:$PATH" && \
+ cp $(which shellcheck) /usr/local/bin/ && \
+ ldd $(which shellcheck) | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /usr/local/lib/ && \
+ export PATH="$OLDPATH" && \
+ ldconfig /usr/local/lib && \
+
+# cleanup
+ apt-get purge -y --auto-remove \
+	$BUILD_PACKAGES && \
+ rm -rf \
+	/root/.cabal \
+	/tmp/* \
+	/var/lib/apt/lists/* \
+	/var/tmp/*
+
+WORKDIR /mnt
+ENTRYPOINT ["shellcheck"]

README.md

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+THIS IS NOT SOMETHING FOR PUBLIC USE
+
+YOU HAVE BEEN WARNED !!!!
+
+HERE BE DRAGONS