Refactor diff generation step to improve clarity and output handling

Author: LiteObject

.github/workflows/code-review.yml

@@ -21,16 +21,23 @@ jobs:
           # Checks out the code from the pull request's head branch.
           ref: ${{ github.event.pull_request.head.ref }}
           fetch-depth: 0
+      
+      # Fetches the base branch (e.g., main) from the remote repository
+      - name: Fetch base branch
+        run: |
+          git fetch origin ${{ github.base_ref }}
 
-      - name: Fetch Pull Request Branch
-        run: git fetch origin pull/${{ github.event.pull_request.number }}/head:pr-branch
+      # - name: Fetch Pull Request Branch
+      #   run: git fetch origin pull/${{ github.event.pull_request.number }}/head:pr-branch
 
       - name: Generate Diff
+        id: generate-diff  
         run: |
-          set -e
-          git diff $GITHUB_BASE_REF pr-branch > change.diff
-          echo "Diff generated successfully."
-          echo "Diff content:" $(cat change.diff)
+          echo "Generating diff between ${{ github.base_ref }} and ${{ github.head_ref }}"
+          DIFF=$(git diff origin/${{ github.base_ref }}...${{ github.head_ref }})
+          echo "diff_output<<EOF" >> $GITHUB_ENV
+          echo "$DIFF" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
 
       - name: Check Diff Size
         id: check_diff_size
@@ -43,6 +50,17 @@ jobs:
             exit 0
           fi
 
+        # Step 4: Output the diff (optional)
+      - name: Print diff
+        run: |
+          echo "Diff Output:"
+          echo "${{ env.diff_output }}"
+
+      # Step 5: Save the diff to a file (optional)
+      - name: Save diff to file
+        run: |
+          echo "${{ env.diff_output }}" > changes.diff
+
       # - name: Install Ollama CLI
       #   run: |
       #     curl -fsSL https://ollama.com/install.sh | sh