fix: Fix workflow to update Chart.yaml only when WordPress version changes

Refactor the image-update-and-release workflow to correctly handle Chart.yaml updates:

Changes:
- Add chart_version_update_needed flag in Update values.yaml step
  - Compares WordPress version before/after update
  - Only sets flag=true if WordPress version actually changed
- Modify Increment chart version step to run only when chart_version_update_needed=true
  - Implement proper suffix handling for versions like 6.9.3-a, 6.9.3-b, etc
  - Support upgrading base version without suffix to add -a suffix
- Update Commit and push changes step
  - Always add values.yaml
  - Only add Chart.yaml if WordPress version was updated
- Update Create Helm package and Create release tag steps
  - Only run if Chart.yaml was updated (chart_version_update_needed=true)
- Update Summary step to show whether Chart.yaml was updated

This prevents Chart.yaml from being updated when only Nginx or other images change,
avoiding version number regression issues (e.g., 6.9.3 -> 6.9.4 when only Nginx updated).

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.gitea/workflows/image-update-and-release.yaml

@@ -153,10 +153,15 @@ jobs:
 
       - name: Update values.yaml
         if: steps.check.outputs.update_needed == 'true'
+        id: update_values
         run: |
           # バックアップを作成
           cp values.yaml values.yaml.bak
 
+          # 現在のWordPressバージョンを取得（Chart.yamlの更新判定用）
+          CURRENT_WP_VERSION=$(grep -A 3 'wordpress:' values.yaml.bak | grep 'tag:' | awk -F'"' '{print $2}')
+          NEW_WP_VERSION="${{ steps.wordpress.outputs.version }}"
+
           # WordPressのtagを更新
           # image.wordpress.tagの行を特定して置換
           awk -v new_tag="${{ steps.wordpress.outputs.version }}" '
@@ -197,34 +202,74 @@ jobs:
           if diff -q values.yaml.bak values.yaml > /dev/null; then
             echo "INFO: No changes were made to values.yaml (versions already up to date)"
             cat values.yaml | grep -A 5 "image:"
+            echo "chart_version_update_needed=false" >> $GITHUB_OUTPUT
           else
             echo "Changes detected in values.yaml"
+
+            # WordPressバージョンが更新されたか判定（Chart.yaml更新の判定用）
+            if [ "$CURRENT_WP_VERSION" != "$NEW_WP_VERSION" ]; then
+              echo "WordPress version changed: $CURRENT_WP_VERSION -> $NEW_WP_VERSION"
+              echo "chart_version_update_needed=true" >> $GITHUB_OUTPUT
+            else
+              echo "INFO: WordPress version unchanged - only other images updated"
+              echo "chart_version_update_needed=false" >> $GITHUB_OUTPUT
+            fi
           fi
 
           echo "=== Updated values.yaml (image section) ==="
           grep -A 10 "^image:" values.yaml
 
       - name: Increment chart version
-        if: steps.check.outputs.update_needed == 'true'
+        if: steps.update_values.outputs.chart_version_update_needed == 'true'
         id: increment
         run: |
-          # Chart.yamlのバージョンをインクリメント
+          # Chart.yamlのバージョンをインクリメント（WordPressバージョン更新時のみ）
           if [ -f Chart.yaml ]; then
             CURRENT_CHART_VERSION=$(grep '^version:' Chart.yaml | awk '{print $2}')
-            # パッチバージョンをインクリメント（例: 1.0.0 -> 1.0.1）
+
-            NEW_CHART_VERSION=$(echo $CURRENT_CHART_VERSION | awk -F. '{print $1"."$2"."$3+1}')
+            # バージョンのベース部分とサフィックスを分離
+            if [[ $CURRENT_CHART_VERSION == *"-"* ]]; then
+              # サフィックス付き（例: 6.9.3-a）の場合、サフィックスをインクリメント
+              BASE_VERSION="${CURRENT_CHART_VERSION%-*}"
+              SUFFIX="${CURRENT_CHART_VERSION#*-}"
+
+              # サフィックスをインクリメント（a -> b, b -> c, など）
+              case "$SUFFIX" in
+                a) NEW_SUFFIX="b" ;;
+                b) NEW_SUFFIX="c" ;;
+                c) NEW_SUFFIX="d" ;;
+                d) NEW_SUFFIX="e" ;;
+                e) NEW_SUFFIX="f" ;;
+                *) NEW_SUFFIX="a" ;;  # 予期しないサフィックスはリセット
+              esac
+              NEW_CHART_VERSION="${BASE_VERSION}-${NEW_SUFFIX}"
+            else
+              # サフィックスなし（例: 6.9.3）の場合、-a を追加
+              NEW_CHART_VERSION="${CURRENT_CHART_VERSION}-a"
+            fi
+
             sed -i "s/^version: .*/version: $NEW_CHART_VERSION/" Chart.yaml
             echo "Chart version updated: $CURRENT_CHART_VERSION -> $NEW_CHART_VERSION"
             echo "new_chart_version=$NEW_CHART_VERSION" >> $GITHUB_OUTPUT
           else
             echo "Chart.yaml not found, skipping version increment"
-            echo "new_chart_version=unknown" >> $GITHUB_OUTPUT
+            echo "new_chart_version=" >> $GITHUB_OUTPUT
           fi
 
       - name: Commit and push changes
         if: steps.check.outputs.update_needed == 'true'
         run: |
-          git add values.yaml Chart.yaml
+          # values.yamlは常に追加
+          git add values.yaml
+
+          # Chart.yamlはWordPressバージョン更新時のみ追加
+          if [ "${{ steps.update_values.outputs.chart_version_update_needed }}" == "true" ]; then
+            echo "Adding Chart.yaml (WordPress version was updated)"
+            git add Chart.yaml
+          else
+            echo "Skipping Chart.yaml (only other images were updated)"
+          fi
+
           git status
 
           if git diff --staged --quiet; then
@@ -260,13 +305,13 @@ jobs:
           echo "Successfully pushed changes to main branch"
 
       - name: Install Helm
-        if: steps.check.outputs.update_needed == 'true'
+        if: steps.update_values.outputs.chart_version_update_needed == 'true'
         uses: azure/setup-helm@v3
         with:
           version: 'latest'
 
       - name: Create Helm package
-        if: steps.check.outputs.update_needed == 'true'
+        if: steps.update_values.outputs.chart_version_update_needed == 'true'
         run: |
           # packagesディレクトリを作成
           mkdir -p ./packages/
@@ -283,9 +328,9 @@ jobs:
           git push origin main || echo "Failed to push packages (this may be expected)"
 
       - name: Create release tag
-        if: steps.check.outputs.update_needed == 'true'
+        if: steps.update_values.outputs.chart_version_update_needed == 'true'
         run: |
-          # リリースタグを作成
+          # リリースタグを作成（Chart.yaml更新時のみ）
           TAG_NAME="v${{ steps.increment.outputs.new_chart_version }}"
 
           cat << EOF > /tmp/tag_msg.txt
@@ -296,7 +341,9 @@ jobs:
           EOF
 
           git tag -a "$TAG_NAME" -F /tmp/tag_msg.txt
-          git push origin "$TAG_NAME" || echo "Failed to push tag (tag may already exist)"
+          if ! git push origin "$TAG_NAME"; then
+            echo "WARNING: Failed to push tag (may already exist or network issue)"
+          fi
 
       - name: Summary
         if: always()
@@ -314,6 +361,11 @@ jobs:
 
           if [ "${{ steps.check.outputs.update_needed }}" == "true" ]; then
             echo ""
+            echo "Chart version update: ${{ steps.update_values.outputs.chart_version_update_needed }}"
+            if [ "${{ steps.update_values.outputs.chart_version_update_needed }}" == "true" ]; then
               echo "Chart version: ${{ steps.increment.outputs.new_chart_version }}"
               echo "Tag: v${{ steps.increment.outputs.new_chart_version }}"
+            else
+              echo "INFO: Chart.yaml skipped (WordPress version unchanged)"
+            fi
           fi