fix: update cosign action (blue-build#94)

.github/workflows/build.yml

@@ -1,8 +1,6 @@
 name: build-ublue
 on:
   pull_request:
-    types:
-      - labeled
     branches:
       - main
     paths-ignore:
@@ -17,64 +15,90 @@ on:
       - '**.md'
       - '**.txt'
 env:
-    IMAGE_NAME: base
+    IMAGE_BASE_NAME: base
     IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}
 
 jobs:
   push-ghcr:
     name: Build and push image
     runs-on: ubuntu-22.04
-    if: contains(github.event.pull_request.labels.*.name, 'ok-to-build') || github.event_name != 'pull_request'
     permissions:
       contents: read
       packages: write
       id-token: write
     strategy:
       fail-fast: false
       matrix:
+        image_name: [silverblue]
         major_version: [37]
         include:
           - major_version: 37
-            is_latest: true
-            is_stable: true
+            is_latest_version: true
+            is_stable_version: true
     steps: 
       # Checkout push-to-registry action GitHub repository
       - name: Checkout Push to Registry action
         uses: actions/checkout@v3
 
+      - name: Matrix Variables
+        run: |
+          echo "IMAGE_NAME=${{ format('{0}-{1}', matrix.image_name, env.IMAGE_BASE_NAME) }}" >> $GITHUB_ENV
+
       - name: Generate tags
         id: generate-tags
         shell: bash
         run: |
-          echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
-          alias_tags=()
-          # Only perform the follow code when the action is spawned from a Pull Request
+          # Generate a timestamp for creating an image version history
+          TIMESTAMP="$(date +%Y%m%d)"
+          MAJOR_VERSION="${{ matrix.major_version }}"
+          COMMIT_TAGS=()
+          BUILD_TAGS=()
+          # Have tags for tracking builds during pull request
+          SHA_SHORT="$(git rev-parse --short HEAD)"
+          COMMIT_TAGS+=("pr-${{ github.event.number }}-${MAJOR_VERSION}")
+          COMMIT_TAGS+=("${SHA_SHORT}-${MAJOR_VERSION}")
+          if [[ "${{ matrix.is_latest_version }}" == "true" ]] && \
+             [[ "${{ matrix.is_stable_version }}" == "true" ]]; then
+              COMMIT_TAGS+=("pr-${{ github.event.number }}")
+              COMMIT_TAGS+=("${SHA_SHORT}")
+          fi
+
+          BUILD_TAGS=("${MAJOR_VERSION}" "${MAJOR_VERSION}-${TIMESTAMP}")
+
+          if [[ "${{ matrix.is_latest_version }}" == "true" ]] && \
+             [[ "${{ matrix.is_stable_version }}" == "true" ]]; then
+              BUILD_TAGS+=("${TIMESTAMP}")
+              BUILD_TAGS+=("latest")
+          fi
+
           if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-            alias_tags+=("pr-${{ github.event.number }}")
+              echo "Generated the following commit tags: "
+              for TAG in "${COMMIT_TAGS[@]}"; do
+                  echo "${TAG}"
+              done
+              alias_tags=("${COMMIT_TAGS[@]}")
           else
-            # The following is run when the timer is triggered or a merge/push to main
-            echo "date=$(date +%Y%m%d)" >> $GITHUB_OUTPUT
-            alias_tags+=("${{ matrix.major_version }}")
-            if [[ "${{ matrix.is_latest }}" == "true" ]]; then
-              alias_tags+=("latest")
-            fi
-            if [[ "${{ matrix.is_stable }}" == "true" ]]; then
-              alias_tags+=("stable")
-            fi
+              alias_tags=("${BUILD_TAGS[@]}")
           fi
+          echo "Generated the following build tags: "
+          for TAG in "${BUILD_TAGS[@]}"; do
+              echo "${TAG}"
+          done
           echo "alias_tags=${alias_tags[*]}" >> $GITHUB_OUTPUT
-        
+
       # Build metadata
       - name: Image Metadata
         uses: docker/metadata-action@v4
         id: meta
         with:
           images: |
-            ${{ env.IMAGE_NAME }}
+            $IMAGE_NAME
           labels: |
-            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/ublue-os/base/main/README.md
+            org.opencontainers.image.title=$IMAGE_NAME
+            org.opencontainers.image.description=A base $IMAGE_NAME image with batteries included
+            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/ublue-os/base/base/README.md
             io.artifacthub.package.logo-url=https://avatars.githubusercontent.com/u/120078124?s=200&v=4
-      
+
       # Build image using Buildah action
       - name: Build Image
         id: build_image
@@ -85,9 +109,8 @@ jobs:
           image: ${{ env.IMAGE_NAME }}
           tags: |
             ${{ steps.generate-tags.outputs.alias_tags }}
-            ${{ steps.generate-tags.outputs.date }}
-            ${{ steps.generate-tags.outputs.sha_short }}
           build-args: |
+            IMAGE_NAME=${{ matrix.image_name }}
             FEDORA_MAJOR_VERSION=${{ matrix.major_version }}
           labels: ${{ steps.meta.outputs.labels }}
           oci: false
@@ -135,12 +158,19 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      # Sign container
+      - uses: sigstore/[email protected]
+        if: github.event_name != 'pull_request'
+
       - name: Sign container image
         run: |
-          cosign sign --key cosign.key ${{ steps.registry_case.outputs.lowercase }}/${{ env.IMAGE_NAME }}@${TAGS}
+          echo "${{ env.COSIGN_PRIVATE_KEY }}" > cosign.key
+          wc -c cosign.key
+          cosign sign -y --key cosign.key ${{ steps.registry_case.outputs.lowercase }}/${{ env.IMAGE_NAME }}@${TAGS}
         env:
           TAGS: ${{ steps.push.outputs.digest }}
           COSIGN_EXPERIMENTAL: false
+          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
 
       - name: Echo outputs
         run: |