Build docker images in Gitlab CI

gitlab-ci-docker-build

#!/usr/bin/env bash

set -x
set -e

# allows `docker build ...` to use images cache
# could be installed with: pip install restore_commit_times
#restore_commit_times .

DOCKERFILE_LOCATION="$1"
[ -z "$DOCKERFILE_LOCATION" ] && DOCKERFILE_LOCATION=.

[ -z "$DOCKER_NAME" ] && DOCKER_NAME=$CI_REGISTRY/$CI_PROJECT_PATH
[ -z "$DOCKER_TAG" ] && DOCKER_TAG=gitlab-$CI_PIPELINE_ID

docker build -t $DOCKER_NAME:$DOCKER_TAG $DOCKERFILE_LOCATION

(

 # wait for 60 seconds for lock to be released and fail on timeout
 flock -w 60 9 || exit 1

 docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

 docker push $DOCKER_NAME:$DOCKER_TAG

 docker tag $DOCKER_NAME:$DOCKER_TAG $DOCKER_NAME:latest
 docker push $DOCKER_NAME:latest

 docker tag $DOCKER_NAME:$DOCKER_TAG $DOCKER_NAME:$CI_COMMIT_REF_NAME
 docker push $DOCKER_NAME:$CI_COMMIT_REF_NAME

) 9>/tmp/gitlab-ci-docker-build.lock