Fix indentation test

.github/workflows/code_layout.yml

@@ -95,12 +95,15 @@ jobs:
         run: ./tests/code_layout/test_doxygen_layout.sh
     
   indentation_check:
+    if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
       - name: Indentation Test
-        run: ./scripts/verify_indentation.sh
+        run: ./scripts/verify_indentation.sh ${{ github.event.pull_request.head.sha }}..${{ github.event.pull_request.base.sha }}
     
   spell_check:
     runs-on: ubuntu-latest

scripts/verify_indentation.sh

@@ -3,8 +3,9 @@ cd $(git rev-parse --show-toplevel)
 
 export PATH=$PATH:$PWD/scripts
 
-if [ -z "$TRAVIS_COMMIT_RANGE" ]; then
-	echo "No commit range given"
+if [ -z "$1" ]; then
+	echo "No commit range given. "
+	echo "  Usage: ./scripts/verify_indentation [HEAD_REF]..[BASE_REF]"
 	exit 0
 fi
 
@@ -19,14 +20,8 @@ ASTYLEDIFF=/tmp/astyle.diff
 true > $ASTYLEDIFF
 
 
-if [[ -n  $TRAVIS_PULL_REQUEST_BRANCH  ]]; then
-  # if on a PR, just analyze the changed files
-  echo "TRAVIS PR BRANCH: $TRAVIS_PULL_REQUEST_BRANCH"
-  FILES=$(git diff --diff-filter=AM --name-only $(git merge-base HEAD ${TRAVIS_BRANCH}) | tr '\n' ' ' )
-elif [[ -n  $TRAVIS_COMMIT_RANGE  ]]; then
-  echo "TRAVIS COMMIT RANGE: $TRAVIS_COMMIT_RANGE"
-  FILES=$(git diff --diff-filter=AM --name-only ${TRAVIS_COMMIT_RANGE/.../..} | tr '\n' ' ' )
-fi
+echo "Commit range: $1"
+FILES=$(git diff --diff-filter=AM --name-only $1 | tr '\n' ' ' )
 
 for f in $FILES; do
 	if ! [ -f "$f" ]; then