Make build_and_run_docker.sh pass shellcheck (with suppressions)

tools/run_tests/dockerize/build_and_run_docker.sh

@@ -18,7 +18,7 @@
 
 set -ex
 
-cd $(dirname $0)/../../..
+cd "$(dirname "$0")/../../.."
 git_root=$(pwd)
 cd -
 
@@ -31,36 +31,38 @@ cd -
 # $@ - Extra args to pass to docker run
 
 # Use image name based on Dockerfile location checksum
-DOCKER_IMAGE_NAME=$(basename $DOCKERFILE_DIR)_$(sha1sum $DOCKERFILE_DIR/Dockerfile | cut -f1 -d\ )
+DOCKER_IMAGE_NAME=$(basename "$DOCKERFILE_DIR")_$(sha1sum "$DOCKERFILE_DIR/Dockerfile" | cut -f1 -d\ )
 
 # Pull the base image to force an update
 if [ "$DOCKER_BASE_IMAGE" != "" ]
 then
-  time docker pull $DOCKER_BASE_IMAGE
+  time docker pull "$DOCKER_BASE_IMAGE"
 fi
 
 if [ "$DOCKERHUB_ORGANIZATION" != "" ]
 then
   DOCKER_IMAGE_NAME=$DOCKERHUB_ORGANIZATION/$DOCKER_IMAGE_NAME
-  time docker pull $DOCKER_IMAGE_NAME
+  time docker pull "$DOCKER_IMAGE_NAME"
 else
   # Make sure docker image has been built. Should be instantaneous if so.
-  docker build -t $DOCKER_IMAGE_NAME $DOCKERFILE_DIR
+  docker build -t "$DOCKER_IMAGE_NAME" "$DOCKERFILE_DIR"
 fi
 
 # Choose random name for docker container
 CONTAINER_NAME="build_and_run_docker_$(uuidgen)"
 
 # Run command inside docker
+# TODO: use a proper array instead of $EXTRA_DOCKER_ARGS
+# shellcheck disable=SC2086
 docker run \
   "$@" \
   -e EXTERNAL_GIT_ROOT="/var/local/jenkins/grpc" \
   -e THIS_IS_REALLY_NEEDED='see https://github.com/docker/docker/issues/14203 for why docker is awful' \
   -v "$git_root:/var/local/jenkins/grpc:ro" \
   -w /var/local/git/grpc \
-  --name=$CONTAINER_NAME \
+  --name="$CONTAINER_NAME" \
   $EXTRA_DOCKER_ARGS \
-  $DOCKER_IMAGE_NAME \
+  "$DOCKER_IMAGE_NAME" \
   /bin/bash -l "/var/local/jenkins/grpc/$DOCKER_RUN_SCRIPT" || FAILED="true"
 
 # Copy output artifacts
@@ -70,7 +72,7 @@ then
 fi
 
 # remove the container, possibly killing it first
-docker rm -f $CONTAINER_NAME || true
+docker rm -f "$CONTAINER_NAME" || true
 
 if [ "$FAILED" != "" ]
 then