Merge branch '5-gitlab-ci-configuration' into 'dev'

Resolve "GitLab CI configuration"

Closes #5

See merge request objectbox/objectbox-generator!3

Author: dan-obx

.gitlab-ci.yml

@@ -0,0 +1,11 @@
+# https://docs.gitlab.com/ce/ci/yaml/
+
+build:
+  tags: [ x64, linux, docker ]
+  image: 
+    name: objectboxio/buildenv-generator-ubuntu:2024-02-22
+    pull_policy: [always, if-not-present]
+  script:
+    - make
+    - make test-depend
+    - make test

ci/docker/Dockerfile.ubuntu

@@ -0,0 +1,5 @@
+FROM ubuntu:22.04
+RUN apt-get update && \
+    apt-get install -y make cmake golang git curl ccache && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*

scripts/docker-build.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+
+# Front-end Python script for managing docker image builds.
+# 
+# Images are 
+#   .. defined as ci/docker/Dockerfile.<image-name>
+#   .. built via `docker-build.py -i <image-name>`.
+#   .. published using `-p` flag.
+#
+
+from os import system, listdir
+from fnmatch import fnmatch
+from os.path import realpath, dirname, abspath, relpath
+from datetime import date
+import glob
+import argparse
+
+topdir=relpath(dirname(realpath(__file__))+"/..")
+docker_dir=topdir+"/ci/docker"
+
+# Constants:
+group="buildenv-generator"
+
+# Defaults:
+version=date.today()
+image="ubuntu"
+
+# CLI:
+parser = argparse.ArgumentParser(
+                    prog='docker-build',
+                    description='Docker build shell',
+                    epilog=f'See {docker_dir}')
+parser.add_argument('-n','--dry-run', help='do not run', action='store_true')
+parser.add_argument('-p','--push', help='push to repository', action='store_true')
+parser.add_argument('--version', help=f"specify version (default: {version})", default=version)
+parser.add_argument('-l','--list', help='list available docker images', action='store_true')
+parser.add_argument('-i','--image', help=f"select image (default: {image})", default=image)
+args = parser.parse_args()
+
+# Dry-run helper:
+def exec(cmd):
+    if args.dry_run:
+        print("DRY: "+cmd)
+    else:
+        system(cmd)
+
+# Action: List
+if args.list:
+    images = [file[11:] for file in listdir(docker_dir) if fnmatch(file, 'Dockerfile.*')]
+    print(f"Available images: {','.join(images)}")
+    exit(0)
+
+# Evaluate full image
+full=f"objectboxio/{group}-{args.image}"
+
+print(f"Building image: {full}")
+
+# Build
+exec(f"docker build -f {docker_dir}/Dockerfile.{args.image} -t {full}:{version} -t {full}:latest {topdir}")
+
+# Push
+if args.push:
+    exec(f"docker push {full}:{version}")
+    exec(f"docker push {full}:latest")