Copilot commented on code in PR #7795:
URL: https://github.com/apache/hadoop/pull/7795#discussion_r2217013279


##########
.github/workflows/build-and-tag-hadoop-image.yaml:
##########
@@ -0,0 +1,138 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: build-and-tag-hadoop-image
+
+# This workflow builds the Hadoop docker image.
+# For non-PR runs, it also pushes the image to the registry, tagging it based 
on the branch name.
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+  push:
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate image ID
+        id: meta
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}/hadoop
+          tags: |
+            type=match,pattern=docker-hadoop-(.*),value={{branch}},group=1
+          flavor: |
+            latest=false
+
+      - name: Check if image exists
+        id: pull
+        run: |
+          success=false
+          if docker pull "$DOCKER_METADATA_OUTPUT_TAGS"; then
+            success=true
+          fi
+
+          echo "success=$success" >> $GITHUB_OUTPUT
+
+      - name: Set up QEMU
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf
+
+      - name: Set up Docker Buildx
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: 
docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349
+
+      - name: Login to GitHub Container Registry
+        id: login
+        if: ${{ github.event_name != 'pull_request' && 
steps.pull.outputs.success == 'false' }}
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        id: build
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  tag:
+    needs: build
+    if: ${{ github.ref_type == 'tag' }}
+    runs-on: ubuntu-latest
+    env:
+      DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+      IMAGE_ID: ${{ needs.build.outputs.image-id }}
+      REGISTRIES: ghcr.io # docker.io is appended dynamically
+    steps:
+      - name: Generate tags
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ${{ github.repository_owner }}/hadoop

Review Comment:
   This image reference is missing the registry prefix. For DockerHub, it 
should be `docker.io/${{ github.repository_owner }}/hadoop` or just 
`apache/hadoop` if targeting the official apache organization.
   ```suggestion
               docker.io/${{ github.repository_owner }}/hadoop
   ```



##########
.github/workflows/build-and-tag-hadoop-image.yaml:
##########
@@ -0,0 +1,138 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: build-and-tag-hadoop-image
+
+# This workflow builds the Hadoop docker image.
+# For non-PR runs, it also pushes the image to the registry, tagging it based 
on the branch name.
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+  push:
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate image ID
+        id: meta
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}/hadoop
+          tags: |
+            type=match,pattern=docker-hadoop-(.*),value={{branch}},group=1
+          flavor: |
+            latest=false
+
+      - name: Check if image exists
+        id: pull
+        run: |
+          success=false
+          if docker pull "$DOCKER_METADATA_OUTPUT_TAGS"; then
+            success=true
+          fi
+
+          echo "success=$success" >> $GITHUB_OUTPUT
+
+      - name: Set up QEMU
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf
+
+      - name: Set up Docker Buildx
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: 
docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349
+
+      - name: Login to GitHub Container Registry
+        id: login
+        if: ${{ github.event_name != 'pull_request' && 
steps.pull.outputs.success == 'false' }}
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        id: build
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  tag:
+    needs: build
+    if: ${{ github.ref_type == 'tag' }}
+    runs-on: ubuntu-latest
+    env:
+      DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+      IMAGE_ID: ${{ needs.build.outputs.image-id }}

Review Comment:
   The build job does not define any outputs, but the tag job is trying to 
reference `needs.build.outputs.image-id`. This will result in an empty IMAGE_ID 
variable and cause the tag job to fail.



##########
.github/workflows/build-and-tag-hadoop-image.yaml:
##########
@@ -0,0 +1,138 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: build-and-tag-hadoop-image
+
+# This workflow builds the Hadoop docker image.
+# For non-PR runs, it also pushes the image to the registry, tagging it based 
on the branch name.
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+  push:
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate image ID
+        id: meta
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}/hadoop
+          tags: |
+            type=match,pattern=docker-hadoop-(.*),value={{branch}},group=1
+          flavor: |
+            latest=false
+
+      - name: Check if image exists
+        id: pull
+        run: |
+          success=false
+          if docker pull "$DOCKER_METADATA_OUTPUT_TAGS"; then
+            success=true
+          fi
+
+          echo "success=$success" >> $GITHUB_OUTPUT
+
+      - name: Set up QEMU
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf
+
+      - name: Set up Docker Buildx
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: 
docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349
+
+      - name: Login to GitHub Container Registry
+        id: login
+        if: ${{ github.event_name != 'pull_request' && 
steps.pull.outputs.success == 'false' }}
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        id: build
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  tag:
+    needs: build
+    if: ${{ github.ref_type == 'tag' }}
+    runs-on: ubuntu-latest
+    env:
+      DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+      IMAGE_ID: ${{ needs.build.outputs.image-id }}
+      REGISTRIES: ghcr.io # docker.io is appended dynamically
+    steps:
+      - name: Generate tags
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ${{ github.repository_owner }}/hadoop
+          tags: |
+            type=match,pattern=docker-image-(.*),value={{ ref_name }},group=1
+          flavor: |
+            latest=false
+
+      - name: Add Docker Hub to targets
+        if: ${{ env.DOCKERHUB_USER }}
+        run: |
+          echo "REGISTRIES=${{ env.REGISTRIES }} docker.io" >> $GITHUB_ENV
+
+      - name: Pull image
+        run: |
+          docker pull "$IMAGE_ID"
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Login to Docker Hub
+        if: ${{ env.DOCKERHUB_USER }}
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          username: ${{ env.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Apply tags to existing image
+        run: |
+          set -x
+          for registry in $REGISTRIES; do
+            opts="$(echo "$DOCKER_METADATA_OUTPUT_TAGS" | sed "s@^@--tag 
$registry/@g" | xargs echo)"

Review Comment:
   The sed command will incorrectly prepend the registry to already-qualified 
tag names, potentially creating malformed tags like 
`docker.io/apache/hadoop:3.4.1` becoming `--tag 
docker.io/docker.io/apache/hadoop:3.4.1`.
   ```suggestion
               opts="$(echo "$DOCKER_METADATA_OUTPUT_TAGS" | sed -E 
"s@^[^/]+:[^:]+$@--tag $registry/&@g" | xargs echo)"
   ```



##########
.github/workflows/build-and-tag-hadoop-image.yaml:
##########
@@ -0,0 +1,138 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: build-and-tag-hadoop-image
+
+# This workflow builds the Hadoop docker image.
+# For non-PR runs, it also pushes the image to the registry, tagging it based 
on the branch name.
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+  push:
+    branches:
+      - 'docker-hadoop-**'
+      - '!docker-hadoop-runner-**'
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate image ID
+        id: meta
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}/hadoop
+          tags: |
+            type=match,pattern=docker-hadoop-(.*),value={{branch}},group=1
+          flavor: |
+            latest=false
+
+      - name: Check if image exists
+        id: pull
+        run: |
+          success=false
+          if docker pull "$DOCKER_METADATA_OUTPUT_TAGS"; then
+            success=true
+          fi
+
+          echo "success=$success" >> $GITHUB_OUTPUT
+
+      - name: Set up QEMU
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf
+
+      - name: Set up Docker Buildx
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: 
docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349
+
+      - name: Login to GitHub Container Registry
+        id: login
+        if: ${{ github.event_name != 'pull_request' && 
steps.pull.outputs.success == 'false' }}
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        id: build
+        if: ${{ steps.pull.outputs.success == 'false' }}
+        uses: docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+  tag:
+    needs: build
+    if: ${{ github.ref_type == 'tag' }}
+    runs-on: ubuntu-latest
+    env:
+      DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+      IMAGE_ID: ${{ needs.build.outputs.image-id }}
+      REGISTRIES: ghcr.io # docker.io is appended dynamically
+    steps:
+      - name: Generate tags
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: |
+            ${{ github.repository_owner }}/hadoop
+          tags: |
+            type=match,pattern=docker-image-(.*),value={{ ref_name }},group=1

Review Comment:
   The syntax `{{ ref_name }}` is incorrect for GitHub Actions. It should be 
`${{ github.ref_name }}` to properly reference the tag name.
   ```suggestion
               type=match,pattern=docker-image-(.*),value=${{ github.ref_name 
}},group=1
   ```



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