v1.3.7: Fix GitHub Actions build (6)

.github/workflows/build.yml

@@ -1,21 +1,34 @@
 name: Build
 on:
   push:
-    tags: *
+    tags: '*'
 
 jobs:
+  prepare-data:
+    name: Prepare Data
+    runs-on: ubuntu-latest
+    outputs:
+      tag: ${{ steps.prepare.outputs.SOURCE_TAG }}
+    steps:
+      - id: prepare
+        name: Prepare environment variables
+        run: |
+          echo ::set-output name=SOURCE_NAME::${GITHUB_REF#refs/*/}
+          echo ::set-output name=SOURCE_BRANCH::${GITHUB_REF#refs/heads/}
+          echo ::set-output name=SOURCE_TAG::${GITHUB_REF#refs/tags/}
+
   build:
     name: GitHub Package Registry
+    id: ghpr
     runs-on: ubuntu-latest
+    needs: [prepare-data]
     steps:
     - uses: actions/checkout@v2
     - name: Login to GitHub Package Registry
       run: echo ${{ secrets.GITHUB_TOKEN }} | docker login https://docker.pkg.github.com -u luketainton --password-stdin
     - name: Build image for GitHub Package Registry
-      run: |
+      run: docker build . --file Dockerfile --tag docker.pkg.github.com/luketainton/ipilot/ipilot:${{ needs.prepare-data.outputs.tag }} --tag docker.pkg.github.com/luketainton/ipilot/ipilot:latest
-        docker build . --file Dockerfile --tag docker.pkg.github.com/luketainton/ipilot/ipilot:latest
-        docker build . --file Dockerfile --tag docker.pkg.github.com/luketainton/ipilot/ipilot:$GITHUB_REF
     - name: Push image to GitHub Package Registry
       run: |
         docker push docker.pkg.github.com/luketainton/ipilot/ipilot:latest
-        docker push docker.pkg.github.com/luketainton/ipilot/ipilot:$GITHUB_REF
+        docker push docker.pkg.github.com/luketainton/ipilot/ipilot:${{ needs.prepare-data.outputs.tag }}