Docker based version of the ruby twitter client "t"

Dockerfile

# Place this in the $TWITTER_DIR
FROM ruby:2.3

RUN gem install t

ENTRYPOINT ["t"]

t

#!/bin/sh

set -e

OPWD=`pwd`
# Place the Dockerfile in $TWITTER_DIR before run this script
TWITTER_DIR="$HOME/.twitter-cli"
TWITTER_RCFILE="$HOME/.trc"
TWITTER_IMAGETAG="twitter:local"

# Check that all we need exists
command_exists() { command -v $1 >/dev/null 2>&1 || { echo >&2 "I require $1 but it's not installed.  Aborting."; exit 1; }; }
docker_installed() { command -v docker >/dev/null 2>&1 || { wget -O- http://get.docker.com | sh - ; }; command -v docker >/dev/null 2>&1 || { echo >&2 "I require docker but it's not installed and I can't install it myself.  Aborting."; exit 1; }; } 

docker_installed

# Use sudo if docker socket is not writeable
[ -w /var/run/docker.sock ] || SUDO=sudo
[ -e /etc/fedora-release ] && MOUNTOPTIONS=:z



# Check that the Dockerfile exists
[ ! -e "$TWITTER_DIR" ] &&  { echo >&2 "Missing my sources.  Aborting."; exit 1; }

cd "$TWITTER_DIR"

# Check that there is a image. If not build a new one
if [ $($SUDO docker images --format "{{.Repository}}:{{.Tag}}" | grep $TWITTER_IMAGETAG | wc -l) -eq 0 ]; then
	$SUDO docker build -t $TWITTER_IMAGETAG .
fi

# Load .trc only if exists
if [ ! -e "$TWITTER_RCFILE" ]; then
	echo "Initialize .trc file"
	touch "$TWITTER_RCFILE"
	$SUDO docker run --rm -it -v "$TWITTER_RCFILE:/root/trc$MOUNTOPTIONS" --entrypoint "/bin/bash" $TWITTER_IMAGETAG -c "t authorize --display-uri && cp /root/.trc /root/trc" 
fi


# Switch back to original directory
cd "$OPWD"

# Run t in container
$SUDO docker run --rm -it -v "$TWITTER_RCFILE:/root/.trc$MOUNTOPTIONS" --read-only $TWITTER_IMAGETAG "$@"