Add style checks

.github/workflows/check_style.yml

@@ -0,0 +1,29 @@
+name: Style Checks
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        container:
+        - 'px4io/px4-dev-simulation-focal:2020-09-14'
+    container: ${{ matrix.container }}
+    steps:
+    - uses: actions/checkout@v1
+    - name: submodule update
+      run: git submodule update --init --recursive
+    - name: Install clang-format
+      run: apt update && apt install -y clang-format-6.0
+    - name: Check Code format
+      working-directory: Tools
+      run: |
+        ./check_code_format.sh ..

Makefile

@@ -32,3 +32,5 @@ docker-run:
 estimate-model:
 	python3 Tools/parametric_model/generate_parametric_model.py --model ${model} --config ${config} --data_selection ${data_selection} ${log} 
 
+format:
+	Tools/fix_code_style.sh .

Tools/check_code_format.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Fix style recursively in all the repository
+sh fix_code_style.sh ..
+
+# Print the diff with the remote branch (empty if no diff)
+git --no-pager diff -U0 --color
+
+# Check if there are changes, and failed
+if ! git diff-index --quiet HEAD --; then echo "Code style check failed, please run clang-format (e.g. with scripts/fix_code_style.sh)"; exit 1; fi

Tools/fix_code_style.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+STYLE="google"
+
+if [ "$#" -eq 0 ]; then
+    echo "Usage: $0 <src_file | dir>"
+    echo ""
+    echo "ERROR: At least one source file or one directory must be provided!"
+
+    exit 1
+fi
+
+for arg in "$@"
+do
+    if [ -f $arg ]; then
+        clang-format-6.0 -i -style='{BasedOnStyle: google, ColumnLimit: 120}' $arg
+    elif [ -d $arg ]; then
+        find $arg -iname '*.h' -o -iname '*.cpp' -o -iname '*.hpp' | xargs clang-format-6.0 -i -style='{BasedOnStyle: google, ColumnLimit: 120}'
+        find $arg -iname '*.h' -o -iname '*.cpp' -o -iname '*.hpp' | xargs chmod 644
+    fi
+done