Add docker labels and a makefile

.editorconfig

@@ -6,3 +6,6 @@ indent_size = 4
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
+
+[Makefile]
+indent_style = tab

.github/workflows/build.yml

@@ -9,4 +9,4 @@ jobs:
             - name: Checkout repository
               uses: actions/checkout@v2
             - name: Build action image
-              run: docker build ./docker
+              run: make docker-build

Makefile

@@ -0,0 +1,16 @@
+.PHONY: update-tags docker-build
+
+docker-build:
+	docker build ./docker \
+		--build-arg VCS_REF=`git rev-parse HEAD` \
+		--build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"`
+
+update-tags:
+	git checkout main
+	git tag -s -f -a -m "latest series" latest
+	git checkout -
+	git checkout 5.x
+	git tag -s -f -a -m "5.x series" 5.x
+	git checkout -
+	git push origin latest -f
+	git push origin 5.x -f

docker/Dockerfile

@@ -2,10 +2,25 @@ FROM php:cli-alpine
 
 ARG RELEASE_VERSION=latest
 
+# Metadata params
+ARG VCS_REF
+ARG BUILD_DATE
+
 COPY entrypoint.sh /entrypoint.sh
 
 ADD https://doctum.long-term.support/releases/${RELEASE_VERSION}/doctum.phar /bin/doctum
 
 RUN echo "Downloaded release version: ${RELEASE_VERSION}" && chmod +x /bin/doctum && php /bin/doctum --version
 
+# Metadata
+LABEL org.label-schema.vendor="Sudo-Bot" \
+    org.label-schema.url="https://github.com/sudo-bot/action-doctum#readme" \
+    org.label-schema.name="Doctum action" \
+    org.label-schema.description="Doctum action for GitHub actions" \
+    org.label-schema.version=${RELEASE_VERSION} \
+    org.label-schema.vcs-url="https://github.com/sudo-bot/action-doctum.git" \
+    org.label-schema.vcs-ref=${VCS_REF} \
+    org.label-schema.build-date=${BUILD_DATE} \
+    org.label-schema.docker.schema-version="1.0"
+
 ENTRYPOINT ["/entrypoint.sh"]

docker/hooks/build

@@ -0,0 +1,5 @@
+#!/bin/sh
+# $IMAGE_NAME var is injected into the build so the tag is correct.
+docker build --build-arg VCS_REF=`git rev-parse HEAD` \
+    --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
+    -t $IMAGE_NAME .