Release workflow revision

.gitea/workflows/build-image.yml

@@ -1,5 +1,6 @@
-# Build the Crucible image. PR-first (D7): PRs build only; push to main also
+# Publish the immutable crucible:<sha> image on version tags.
-# publishes registry.westgate.pw/deployment/crucible:<git-sha>. Never a mutable tag.
+# PR/main test builds live in test-image.yml and never publish, so registry
+# packages are only generated for releases we intend to use (not on every merge).
 #
 # Daemonless: the host-mode runner has no container runtime, so the image is
 # built by Nix (`nix build .#image`, see flake.nix) and pushed with skopeo
@@ -8,15 +9,14 @@ name: build-image
 
 on:
   push:
-    branches: [main]
+    tags: ["v*"]
-  pull_request:
 
 env:
   REGISTRY: registry.westgate.pw
   IMAGE: deployment/crucible
 
 jobs:
-  build-image:
+  publish:
     runs-on: nix-docker
     steps:
       - uses: actions/checkout@v4
@@ -29,9 +29,7 @@ jobs:
       - name: Build OCI image (daemonless)
         run: nix build .#image
 
-      # Publish only on main (post-merge). PRs verify the build but never push.
       - name: Publish image
-        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
         env:
           REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
           REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}

.gitea/workflows/publish-image.yml

@@ -0,0 +1,49 @@
+# Manual compatibility publisher for the Crucible image.
+# Normal release publishing happens in build-image.yml on v* tags; this is the
+# break-glass / re-publish path, triggered by hand.
+#
+# Daemonless: built by Nix (`nix build .#image`) and pushed with skopeo from the
+# OCI tarball. No `docker build`/`docker login` involved.
+name: publish-image
+
+on:
+  workflow_dispatch:
+
+env:
+  REGISTRY: registry.westgate.pw
+  IMAGE: deployment/crucible
+
+jobs:
+  publish:
+    runs-on: nix-docker
+    steps:
+      - uses: actions/checkout@v4
+        with: { fetch-depth: 0 }
+
+      - name: Resolve tag
+        id: tag
+        run: echo "sha=$(git rev-parse --short=12 HEAD)" >> "$GITHUB_OUTPUT"
+
+      - name: Build OCI image (daemonless)
+        run: nix build .#image
+
+      - name: Publish image
+        env:
+          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
+        run: |
+          nix shell nixpkgs#skopeo -c skopeo copy \
+            --dest-creds "${REGISTRY_USER}:${REGISTRY_PASSWORD}" \
+            docker-archive:result \
+            "docker://${REGISTRY}/${IMAGE}:${{ steps.tag.outputs.sha }}"
+
+      - name: Emit release fragment
+        run: |
+          FRAG_REPO=sow-tools \
+          FRAG_SHA=${{ steps.tag.outputs.sha }} \
+          FRAG_ARTIFACT="${REGISTRY}/${IMAGE}:${{ steps.tag.outputs.sha }}" \
+          FRAG_URL="${REGISTRY}/${IMAGE}" \
+          FRAG_RUN_ID=${{ gitea.run_id }} \
+          bash scripts/emit-release-fragment.sh
+      - uses: actions/upload-artifact@v3
+        with: { name: release-fragment, path: release-fragment.json }

.gitea/workflows/test-image.yml

@@ -0,0 +1,19 @@
+# Test-build the Crucible image on PRs and main. Proves `nix build .#image`
+# still works (daemonless, Nix-built OCI tarball) but does NOT publish —
+# release publishing happens in build-image.yml on v* tags.
+name: test-image
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  build-image:
+    runs-on: nix-docker
+    steps:
+      - uses: actions/checkout@v4
+        with: { fetch-depth: 0 }
+
+      - name: Build OCI image (daemonless, no publish)
+        run: nix build .#image