Dockerize shellcheck

docker/Dockerfile

@@ -0,0 +1,18 @@
+FROM ubuntu:16.04
+MAINTAINER koalaman <koalaman@gmail.com>
+
+RUN apt-get update -qqy
+
+RUN apt-get -qqy install haskell-platform
+
+RUN cabal update
+RUN cabal install shellcheck
+
+# Clean apt cache
+RUN apt-get clean && \
+    apt-get autoremove && \
+    rm -rf /var/lib/apt/lists/* \
+    rm -rf /var/cache/*.tar.gz \
+    rm -rf /var/cache/*/*.tar.gz
+
+ENTRYPOINT ["/root/.cabal/bin/shellcheck"]

docker/README.md

@@ -0,0 +1,5 @@
+This docker image wraps [shellcheck](https://github.com/koalaman/shellcheck) as a single executable.
+
+How to use it? For example, you have a shell script named `sample.sh` under the current directory, you can lint it by running:
+
+    docker run -v $(pwd):/tmp/work shellcheck /tmp/work/sample.sh