refactor(docker): Roll our own push to GH package registry

The official GH Action for this gets worse and worse with every version,
and the old versions aren't properly supported any more.

cf. docker/build-push-action#208

This isn't actually that hard, and with a make rule for it we have the
option to build and push locally.

.github/workflows/deploy.yml

@@ -6,26 +6,9 @@ on:
       - 'v*.*.*'
 
 jobs:
-  ghpackages:
-
-    runs-on: ubuntu-20.04
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Push to GitHub Packages
-        uses: docker/build-push-action@v1
-        with:
-          username: ${{ github.actor }}
-          password: ${{ github.token }}
-          registry: docker.pkg.github.com
-          repository: sile-typesetter/casile/casile
-          tag_with_ref: true
-
-  ghrelease:
-
-    runs-on: ubuntu-20.04
 
+  ghpublish:
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -47,11 +30,20 @@ jobs:
           name: casile-${{ env.VERSION }}
           path: casile*-${{ env.VERSION }}.zip
       - name: Publish Release
-        uses: softprops/action-gh-release@v0.1.5
+        uses: softprops/action-gh-release@v1
         with:
           body_path: casile-${{ env.VERSION }}.md
           files: |
             casile-${{ env.VERSION }}.zip
             casile-${{ env.VERSION }}.tar.xz
         env:
           GITHUB_TOKEN: ${{ github.token }}
+      - name: Publish Docker Image to GH Pakcages
+        run: |
+          make docker-build-push
+        env:
+          DOCKER_REGISTRY: docker.pkg.github.com
+          DOCKER_REPO: $GITHUB_REPOSITORY/casile
+          DOCKER_TAG: ${{ env.VERSION }}
+          DOCKER_USERNAME: ${{ github.actor }}
+          DOCKER_PASSWORD: ${{ github.token }}

Makefile.am

@@ -209,6 +209,17 @@ casile-%.md: CHANGELOG.md
 	sed -e '/\.\.\.v$*/,/\.\.\.v/!d' $< | \
 		sed -e '1,3d;N;$$!P;$$!D;$$d' > $@
 
+export DOCKER_REGISTRY ?= docker.io
+export DOCKER_REPO ?= siletypesetter/$(_casile)
+export DOCKER_TAG ?= HEAD
+
 .PHONY: docker
 docker: Dockerfile hooks/build .version
-	IMAGE_NAME=siletypesetter/$(_casile):HEAD ./hooks/build $(VERSION)
+	./hooks/build $(VERSION)
+	docker tag $(DOCKER_REPO):$(DOCKER_TAG) $(DOCKER_REGISTRY)/$(DOCKER_REPO):$(DOCKER_TAG)
+
+
+.PHONY: docker-build-push
+docker-build-push: docker
+	docker login https://$(DOCKER_REGISTRY) -u $(DOCKER_USERNAME)
+	docker push $(DOCKER_REGISTRY)/$(DOCKER_REPO):$(DOCKER_TAG)

hooks/build

@@ -22,5 +22,5 @@ docker build \
 	--build-arg VCS_REF="${1:-$DESC}" \
 	--build-arg RUNTIME_DEPS="$RUNTIME_DEPS" \
 	--build-arg BUILD_DEPS="$BUILD_DEPS" \
-	--tag $IMAGE_NAME \
+	--tag $DOCKER_REPO:$DOCKER_TAG \
 	./