ci: polish linelint job

Author: bky373

.github/workflows/integration.yaml

@@ -11,39 +11,18 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Get list of changed files
-        id: changed-files
+      - name: Find files missing end line break
         run: |
-          changed_files=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | jq -R -s -c 'split("\n")[:-1]')
-          echo "changed_files: $changed_files"
-          echo "files=$changed_files" >> $GITHUB_OUTPUT
-
-      - name: Check for missing newlines
-        id: newline-check
-        run: |
-          files_without_newline=()
-          while IFS= read -r file; do
-            if [ -f "$file" ]; then
-              last_char=$(tail -c 1 "$file")
-              if [ -n "$last_char" ]; then
-                files_without_newline+=("$file")
-              fi
+          files=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }})
+          success=true
+          for file in $files; do
+            if [ "$(tail -c 1 $file | wc -l)" -eq 0 ]; then
+              echo "- $file" >> $GITHUB_STEP_SUMMARY
+              success=false
             fi
-          done < <(echo '${{ steps.changed-files.outputs.files }}' | jq -r '.[]')
+          done
 
-          if [ ${#files_without_newline[@]} -gt 0 ]; then
-            json_files=$(printf '%s\n' "${files_without_newline[@]}" | jq -R -s -c 'split("\n")[:-1]')
-            echo "files_without_newline: $json_files"
-            echo "files=$json_files" >> $GITHUB_OUTPUT
+          if [ "$success" = false ]; then
+            echo -e "\n:warning: 위 파일들의 끝에 누락된 줄 바꿈을 추가해 주세요." >> $GITHUB_STEP_SUMMARY
             exit 1
           fi
-
-      - name: Set Job Summary
-        if: failure()
-        run: |
-          if [ -n '${{ steps.newline-check.outputs.files }}' ]; then
-          echo "🛠️ 아래 파일들에 공백 줄을 추가해주세요:" >> $GITHUB_STEP_SUMMARY
-          echo '${{ steps.newline-check.outputs.files }}' |
-            jq -r '.[]' |
-            sed 's/^/- /' >> $GITHUB_STEP_SUMMARY
-          fi