v1.3.4: Fix GitHub Actions build (3)

.github/workflows/build.yml

@@ -4,9 +4,22 @@ on:
     tags: '*'
 
 jobs:
+  prepare:
+    name: Prepare Data
+    id: prepare
+    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
+    env:
+      SOURCE_NAME: ${{ steps.prepare.outputs.SOURCE_NAME }}
+      SOURCE_BRANCH: ${{ steps.prepare.outputs.SOURCE_BRANCH }}
+      SOURCE_TAG: ${{ steps.prepare.outputs.SOURCE_TAG }}
     steps:
     - uses: actions/checkout@v2
     - name: Login to GitHub Package Registry
@@ -14,8 +27,8 @@ jobs:
     - name: Build image for GitHub Package Registry
       run: |
         docker build . --file Dockerfile --tag docker.pkg.github.com/luketainton/ipilot/ipilot:latest
-        docker build . --file Dockerfile --tag docker.pkg.github.com/luketainton/ipilot/ipilot:$GITHUB_REF
+        docker build . --file Dockerfile --tag docker.pkg.github.com/luketainton/ipilot/ipilot:$SOURCE_TAG
     - name: Push image to GitHub Package Registry
       run: |
         docker push docker.pkg.github.com/luketainton/ipilot/ipilot:latest
-        docker push docker.pkg.github.com/luketainton/ipilot/ipilot:$GITHUB_REF
+        docker push docker.pkg.github.com/luketainton/ipilot/ipilot:$SOURCE_TAG