Final review

base-notebook/Dockerfile

@@ -143,4 +143,4 @@ RUN fix-permissions /etc/jupyter/
 # Switch back to jovyan to avoid accidental container runs as root
 USER $NB_UID
 
-WORKDIR $HOME
+WORKDIR $HOME

datascience-notebook/Dockerfile

@@ -32,7 +32,6 @@ ENV JULIA_VERSION=1.4.1
 
 WORKDIR /tmp
 
-# TODO
 # hadolint ignore=SC2046
 RUN mkdir "/opt/julia-${JULIA_VERSION}" && \
     wget -q https://julialang-s3.julialang.org/bin/linux/x64/$(echo "${JULIA_VERSION}" | cut -d. -f 1,2)"/julia-${JULIA_VERSION}-linux-x86_64.tar.gz" && \
@@ -93,4 +92,4 @@ RUN julia -e 'import Pkg; Pkg.update()' && \
     rm -rf "${HOME}/.local" && \
     fix-permissions "${JULIA_PKGDIR}" "${CONDA_DIR}/share/jupyter"
 
-WORKDIR $HOME
+WORKDIR $HOME

docs/contributing/lint.md

@@ -1,10 +1,10 @@
 # Image Lint
 
-We are using the [Hadolint][LK1] tool to analyse each `Dockerfile` to comply with [Docker best practices][LK2].
+To comply with [Docker best practices][LK2], we are using the [Hadolint][LK1] tool to analyse each `Dockerfile` .
 
-## Install
+## Installation
 
-There is a specific make target to install the linter.
+There is a specific `make` target to install the linter.
 By default `hadolint` will be installed in `${HOME}/hadolint`.
 
 ```bash
@@ -17,7 +17,9 @@ $ make lint-install
 
 ## Lint
 
-The linter can be run per stack `make lint/<stack>`.
+### Per Stack
+
+The linter can be run per stack.
 
 ```bash
 $ make lint/scipy-notebook  
@@ -39,15 +41,17 @@ Optionally you can pass arguments to the linter.
 $ make lint/scipy-notebook ARGS="--format codeclimate"  
 ```
 
-To lint all the stacks.
+### All the Stacks
+
+The linter can be run against all the stacks.
 
 ```bash
 $ make lint-all
 ```
 
-## Ignore Rules
+## Ignoring Rules
 
-Sometimes it's necessary to ignore [some rules][LK3]. The preferred way is to do it in the `Dockerfile`.
+Sometimes it is necessary to ignore [some rules][LK3]. The preferred way to do it is to flag ignored rules in the `Dockerfile`.
 
 > It is also possible to ignore rules by using a special comment directly above the Dockerfile instruction you want to make an exception for. Ignore rule comments look like `# hadolint ignore=DL3001,SC1081`. For example:
 

pyspark-notebook/Dockerfile

@@ -21,7 +21,6 @@ RUN apt-get -y update && \
 
 # Using the preferred mirror to download Spark
 WORKDIR /tmp
-# TODO
 # hadolint ignore=SC2046
 RUN wget -q $(wget -qO- https://www.apache.org/dyn/closer.lua/spark/spark-${APACHE_SPARK_VERSION}/spark-${APACHE_SPARK_VERSION}-bin-hadoop${HADOOP_VERSION}.tgz\?as_json | \
     python -c "import sys, json; content=json.load(sys.stdin); print(content['preferred']+content['path_info'])") && \
@@ -46,4 +45,4 @@ RUN conda install --quiet -y 'pyarrow' && \
     fix-permissions "${CONDA_DIR}" && \
     fix-permissions "/home/${NB_USER}"
 
-WORKDIR $HOME
+WORKDIR $HOME

scipy-notebook/Dockerfile

@@ -75,9 +75,11 @@ RUN git clone https://github.com/PAIR-code/facets.git && \
     fix-permissions "/home/${NB_USER}"
 
 # Import matplotlib the first time to build the font cache.
-ENV XDG_CACHE_HOME /home/$NB_USER/.cache/
+ENV XDG_CACHE_HOME="/home/${NB_USER}/.cache/"
+
 RUN MPLBACKEND=Agg python -c "import matplotlib.pyplot" && \
     fix-permissions "/home/${NB_USER}"
 
 USER $NB_UID
-WORKDIR $HOME
+
+WORKDIR $HOME