Add github action to format code on push and the clang format file.

.clang-format

@@ -0,0 +1,55 @@
+Language: Cpp
+BasedOnStyle: Google
+IndentWidth: 4
+TabWidth: 4
+UseTab: Never
+AllowShortFunctionsOnASingleLine: Empty
+
+SortIncludes: Never
+
+NamespaceIndentation: None
+
+BraceWrapping:
+  AfterNamespace: true
+  AfterFunction: true
+  AfterControlStatement: true
+  AfterClass: true
+  SplitEmptyFunction: false
+  BeforeCatch: true
+  BeforeElse: true
+  BeforeLambdaBody: false
+
+AlignAfterOpenBracket: Align
+AlignOperands: false
+AccessModifierOffset: -4
+
+BreakBeforeBraces: Custom
+
+BinPackParameters: false
+BinPackArguments: false
+Cpp11BracedListStyle: false
+
+PointerAlignment: Left
+
+SpacesInContainerLiterals: true
+SpaceBeforeParens: Never
+SpaceBeforeRangeBasedForLoopColon: false
+
+AllowAllParametersOfDeclarationOnNextLine: false
+
+CommentPragmas: '^!|^@'
+SpaceAfterTemplateKeyword: false
+
+ContinuationIndentWidth: 8
+ConstructorInitializerIndentWidth: 4
+BreakConstructorInitializers: AfterColon
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+
+SpaceBeforeCtorInitializerColon: false
+SpacesInAngles: true
+SpacesInParentheses: true
+SpacesInSquareBrackets: true
+SpaceInEmptyParentheses: true
+SpaceInEmptyBlock: true
+
+ColumnLimit: 140

.github/workflows/clang-format.yml

@@ -0,0 +1,90 @@
+name: Clang-Format Check and Fix
+
+on:
+  push:
+    branches:
+      - develop
+      - feature/github_action
+
+jobs:
+  format-check:
+    if: ${{ !contains(github.event.head_commit.message, 'Apply clang-format') }}
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.GH_PAT }}
+          fetch-depth: 1
+          persist-credentials: true
+
+      - name: Install Clang-Format
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y clang-format
+          clang-format --version
+
+      - name: Ensure the previous commit is available
+        run: |
+          # Try to fetch the commit corresponding to github.event.before
+          git fetch origin ${{ github.event.before }} --depth=1
+
+      - name: Get list of changed files
+        id: changed-files
+        run: |
+          CHANGED_FILES=$(git diff --name-only "${{ github.event.before }}" "${{ github.sha }}" | grep -E "\.(cpp|h|c)$" || true)
+          echo "Changed files:"
+          echo "$CHANGED_FILES"
+          if [ -z "$CHANGED_FILES" ]; then
+            echo "No changed files detected."
+            echo "files=" >> "$GITHUB_OUTPUT"
+          else
+            # Use heredoc syntax to correctly handle multi-line output
+            echo "files<<EOF" >> "$GITHUB_OUTPUT"
+            echo "$CHANGED_FILES" >> "$GITHUB_OUTPUT"
+            echo "EOF" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Run Clang-Format on Changed Files
+        run: |
+          if [ -z "${{ steps.changed-files.outputs.files }}" ]; then
+            echo "No changed C/C++ files detected. Exiting."
+          else
+            echo "Running clang-format on the following files:"
+            echo "${{ steps.changed-files.outputs.files }}" | tr ' ' '\n'
+            # Using newline as the delimiter for xargs
+            echo "${{ steps.changed-files.outputs.files }}" | tr ' ' '\n' | xargs -r clang-format -style=file -i
+          fi
+
+      - name: Check for Formatting Differences
+        id: check_diff
+        run: |
+          # Instead of exiting with non-zero, check if there is any diff and store that as an output.
+          if git diff --quiet; then
+            echo "No formatting differences."
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "Formatting differences detected."
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Auto-commit Formatting Changes
+        if: steps.check_diff.outputs.changed == 'true'
+        run: |
+          git config --local user.name "github-actions[bot]"
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git add .
+          # Commit only if there is something to commit.
+          git commit -m "Apply clang-format" || exit 0
+          branch=${GITHUB_REF#refs/heads/}
+          git push origin HEAD:"$branch"
+
+
+      - name: Report Success or Failure
+        run: |
+          if [ "${{ steps.check_diff.outputs.changed }}" == "true" ]; then
+            echo "Formatting issues were detected and fixed."
+          else
+            echo "Code is properly formatted."
+          fi