CI: build container when the version is a clean git tag 3

.forgejo/workflows/build.yaml

@@ -16,6 +16,17 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Get the version from git
+        id: version
+        run: echo "version=$(git describe --dirty --tags)" >> $GITHUB_OUTPUT
+
+      - name: Check if the container should be built
+        id: builder
+        run: echo "run=toJSON(${{ inputs.build || !contains(steps.version.output.version, '-')) }}" >> $GITHUB_OUTPUT
+
+      - name: Check
+        run: echo "Build? fromJSON(${{ steps.builder.output.run }})"
+
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:
@@ -37,19 +48,8 @@ jobs:
       #  if: ${{ inputs.build }}
       #  run: git pull --unshallow
 
-      - name: Get the version from git
-        id: version
-        run: echo "version=$(git describe --dirty --tags)" >> $GITHUB_OUTPUT
-
-      - name: Check if the container should be built
-        id: builder
-        run: echo "run=${{ inputs.build || !contains(steps.version.output.version, '-') }}" >> $GITHUB_OUTPUT
-
-      - name: Check
-        run: echo "Build? ${{ steps.builder.output.run }}"
-
       - name: Build container
-        if: ${{ steps.builder.output.run }}
+        if: fromJSON(steps.builder.output.run)
         uses: actions/buildah-build@v1
         with:
           image: treetrail-frontend
@@ -60,13 +60,13 @@ jobs:
             ./Containerfile
 
       - name: Workaround for bug of podman-login
-        if: ${{ steps.builder.output.run }}
+        if: fromJSON(steps.builder.output.run)
         run: |
           mkdir -p $HOME/.docker
           echo "{ \"auths\": {} }" > $HOME/.docker/config.json
 
       - name: Log in to container registry (with another workaround)
-        if: ${{ steps.builder.output.run }}
+        if: fromJSON(steps.builder.output.run)
         uses: actions/podman-login@v1
         with:
           registry: ${{ vars.REGISTRY }}
@@ -75,7 +75,7 @@ jobs:
           auth_file_path: /tmp/auth.json
 
       - uses: actions/push-to-registry@v2
-        if: ${{ steps.builder.output.run }}
+        if: fromJSON(steps.builder.output.run)
         with:
           registry: "docker://${{ vars.REGISTRY }}"
           image: treetrail-frontend