#!/bin/bash SOURCE="${BASH_SOURCE[0]}" while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )" SOURCE="$(readlink "$SOURCE")" [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located done DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )" cd $DIR/../ docker run --rm -v "$DIR/../":/usr/src/app -w /usr/src/app ruby:2.5-alpine /bin/sh -c "gem install bundler; bundle lock --update"