This script allows to build a docker image generating the tag version from the git revision

buildDockerImage.sh

#!/bin/sh

script_name="${BASH_SOURCE[${#BASH_SOURCE[@]} - 1]}"
script_folder=$(cd `dirname $script_name` && pwd)

print_usage() {
    echo "Usage: $script_name <options>"
    echo ""
    echo "Options:"
    echo "\t-a <arguments>\targuments to pass to the docker build command"
    echo "\t-d\t\tfor a dry run"
    echo "\t-f <folder>\tto specify the folder with the Dockerfile; default value: current folder"
    echo "\t-n <name>\tto specify the image name; default: name of the folder with the Dockerfile"
    echo "\t-t <tag>\tto specify the image tag; default: git revision"
    echo "\t-v\t\tto print every step performed"
}

dry_run=false
folder=$(pwd)
name=
tag=
verbose=false
arguments=
while getopts ":a:df:n:t:v" option
do
    case "${option}"
    in
        a) arguments=$OPTARG;;
        d) dry_run=true;;
        f) folder=$(cd $OPTARG && pwd);; # make sure the path is absolute
        n) name=$OPTARG;;
        t) tag="$OPTARG";;
        v) verbose=true;;
        :) print_usage; >&2 echo "Missing argument for option -$OPTARG"; exit 1 ;;
        ?) print_usage; >&2 echo "Unknown option: ${option}"; exit 1;;
    esac
done
shift $((OPTIND -1))

if [ -z "$name" ]; then
    name=${folder##*/}
fi

if [ -z "$tag" ]; then
    tag=$(cd ${folder} && git rev-parse --short HEAD 2> /dev/null)
    if [[ tag -eq "" ]]; then
        tag="0000000"
    fi

    if [[ ! -z $(git status -s) ]]; then
        # the local repository contains uncommitted files
        echo "\033[33mThe repository contains local changes, this image should only be used for testing\033[0m"
        tag=$tag".dirty"
    fi
fi

echo "Building docker image with tag "$name':'$tag

if [[ "$verbose" = true || "$dry_run" = true ]] ; then
    echo 'docker build --tag '$name':'$tag $arguments $folder
fi
if [ "$dry_run" = false ]; then
    docker build --tag $name":"$tag $arguments $folder
fi