fix mujoco-related build failure

.travis.yml

@@ -9,7 +9,7 @@ env:
 
 install: "" # so travis doesn't do pip install requirements.txt
 script:
-  - docker build -f test.dockerfile.${UBUNTU_VER} -t gym-test .
+  - docker build -f test.dockerfile.${UBUNTU_VER} -t gym-test --build-arg MUJOCO_KEY=$MUJOCO_KEY.
   - docker run -e MUJOCO_KEY=$MUJOCO_KEY gym-test tox
 
 deploy:

bin/docker_entrypoint

@@ -1,12 +1,6 @@
 #!/bin/bash
 # This script is the entrypoint for our Docker image.
 
-set -x
-
-if [[ ! -z "$MUJOCO_KEY" ]]; then 
-    echo $MUJOCO_KEY | base64 --decode > /root/.mujoco/mjkey.txt
-fi
-
 set -ex
 
 # Set up display; otherwise rendering will fail

test.dockerfile.16.04

@@ -36,13 +36,13 @@ RUN \
     mkdir /root/.mujoco && \
     cd /root/.mujoco  && \
     wget https://www.roboti.us/download/mjpro150_linux.zip  && \
-    unzip mjpro150_linux.zip && \
-
-# setup vim to be humane and compatible with codebase standards
-    echo "set expandtab number shiftwidth=4 tabstop=4" > /root/.vimrc
+    unzip mjpro150_linux.zip
 
+ARG MUJOCO_KEY
 ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/root/.mujoco/mjpro150/bin
 
+RUN echo $MUJOCO_KEY | base64 --decode > /root/.mujoco/mjkey.txt
+
 # install dependencies
 COPY . /usr/local/gym/
 RUN cd /usr/local/gym && \

test.dockerfile.18.04

@@ -32,7 +32,9 @@ RUN \
     wget https://www.roboti.us/download/mjpro150_linux.zip  && \
     unzip mjpro150_linux.zip
 
+ARG MUJOCO_KEY
 ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/root/.mujoco/mjpro150/bin
+RUN echo $MUJOCO_KEY | base64 --decode > /root/.mujoco/mjkey.txt
 
 # install dependencies
 COPY . /usr/local/gym/