[CI] Add auto update workflow for Dockerfile graph (#11879)

Signed-off-by: wineandchord <guoqizhou19@gmail.com>

.pre-commit-config.yaml

@@ -122,6 +122,12 @@ repos:
     language: system
     always_run: true
     pass_filenames: false
+  - id: update-dockerfile-graph
+    name: Update Dockerfile dependency graph
+    entry: tools/update-dockerfile-graph.sh
+    language: script
+    files: ^docker/Dockerfile$
+    pass_filenames: false
   # Keep `suggestion` last
   - id: suggestion
     name: Suggestion

tools/update-dockerfile-graph.sh

+#!/bin/bash
+# Update Dockerfile dependency graph when docker/Dockerfile changes.
+# This script is designed to be used as a pre-commit hook.
+
+set -euo pipefail
+
+# Check if docker/Dockerfile is staged for commit
+if git diff --cached --name-only | grep -q "^docker/Dockerfile$"; then
+  echo "docker/Dockerfile has changed, attempting to update dependency graph..."
+
+  # Check if Docker is installed and running
+  if ! command -v docker &> /dev/null; then
+    echo "Warning: Docker command not found. Skipping Dockerfile graph update."
+    echo "Please install Docker to automatically update the graph: https://docs.docker.com/get-docker/"
+    exit 0
+  fi
+  if ! docker info &> /dev/null; then
+    echo "Warning: Docker daemon is not running. Skipping Dockerfile graph update."
+    echo "Please start Docker to automatically update the graph."
+    exit 0
+  fi
+
+  # Define the target file path
+  TARGET_GRAPH_FILE="docs/source/assets/contributing/dockerfile-stages-dependency.png"
+
+  # Ensure target directory exists
+  mkdir -p "$(dirname "$TARGET_GRAPH_FILE")"
+
+  # Store old image hash in a variable if the file exists
+  OLD_HASH=""
+  if [ -f "$TARGET_GRAPH_FILE" ]; then
+    OLD_HASH=$(sha256sum "$TARGET_GRAPH_FILE")
+  fi
+  
+  # Generate Dockerfile graph
+  echo "Running dockerfilegraph tool..."
+  docker run \
+    --rm \
+    --user "$(id -u):$(id -g)" \
+    --workdir /workspace \
+    --volume "$(pwd)":/workspace \
+    ghcr.io/patrickhoefler/dockerfilegraph:alpine \
+    --output png \
+    --dpi 200 \
+    --max-label-length 50 \
+    --filename docker/Dockerfile \
+    --legend
+  
+  echo "Finding generated PNG file..."
+  # Check for Dockerfile.png in the root directory (most likely location)
+  if [ -f "./Dockerfile.png" ]; then
+    echo "Found generated file at: ./Dockerfile.png"
+    mv "./Dockerfile.png" "$TARGET_GRAPH_FILE"
+  else
+    # Try to find it elsewhere
+    DOCKERFILE_PNG=$(find . -name "Dockerfile.png" -type f | head -1)
+    
+    if [ -n "$DOCKERFILE_PNG" ]; then
+      echo "Found generated file at: $DOCKERFILE_PNG"
+      mv "$DOCKERFILE_PNG" "$TARGET_GRAPH_FILE"
+    else
+      echo "Error: Could not find the generated PNG file"
+      find . -name "*.png" -type f -mmin -5
+      exit 1
+    fi
+  fi
+  
+  # Check if the graph has changed
+  NEW_HASH=$(sha256sum "$TARGET_GRAPH_FILE")
+  if [ "$NEW_HASH" != "$OLD_HASH" ]; then
+    echo "Graph has changed. Please stage the updated file: $TARGET_GRAPH_FILE"
+    exit 1
+  else
+    echo "No changes in graph detected."
+  fi
+fi
+
+exit 0