Add CI script

.gitlab-ci.yml

@@ -0,0 +1,25 @@
+# https://docs.gitlab.com/ee/ci/docker/using_docker_build.html#docker-alternatives
+# Some details from https://major.io/2019/05/24/build-containers-in-gitlab-ci-with-buildah/
+
+build:
+  stage: build
+  image: quay.io/buildah/stable
+  variables:
+    # Use vfs with buildah. Docker offers overlayfs as a default, but buildah
+    # cannot stack overlayfs on top of another overlayfs filesystem.
+    STORAGE_DRIVER: vfs
+    # You may need this workaround for some errors: https://stackoverflow.com/a/70438141/1233435
+    BUILDAH_ISOLATION: chroot
+    FQ_IMAGE_NAME: "$CI_REGISTRY_IMAGE/tcpproxy:$CI_COMMIT_SHORT_SHA"
+    FQ_IMAGE_REF_NAME: "$CI_REGISTRY_IMAGE/tcpproxy:$CI_COMMIT_REF_NAME"
+  before_script:
+    # Log in to the GitLab container registry
+    - export REGISTRY_AUTH_FILE=$HOME/auth.json
+    - echo "$CI_REGISTRY_PASSWORD" | buildah login -u "$CI_REGISTRY_USER" --password-stdin $CI_REGISTRY
+  script:
+    - buildah images
+    - buildah build -t $FQ_IMAGE_NAME
+    - buildah tag $FQ_IMAGE_NAME $FQ_IMAGE_REF_NAME
+    - buildah images
+    - buildah push $FQ_IMAGE_NAME
+    - buildah push $FQ_IMAGE_REF_NAME