ci: add script to check line endings

Author: igrr

.gitlab-ci.yml

@@ -343,6 +343,14 @@ run_autotests_armel:
     - ./run_tests.py -o $DIST_DIR/bin/openocd -s $DIST_DIR/share/openocd/scripts -a $PWD/test_apps -d 4 -l ./debug_backend_tests.log
     - popd
 
+style_check:
+  stage: test
+  image: $CI_DOCKER_REGISTRY/esp32-toolchain
+  tags:
+    - build
+  script:
+    - tools/check-line-endings.sh $PWD
+
 push_master_to_github:
   stage: deploy
   image: $CI_DOCKER_REGISTRY/esp32-ci-env

tools/check-line-endings.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if ! [ -z "$1" ]; then
+    cd "$1"
+fi
+
+echo "Checking for Windows line endings in `pwd`"
+
+if git ls-tree --name-only -r HEAD | xargs file -N | grep CRLF; then
+    echo "Some files have CRLF (Windows-style) line endings. Please convert to LF (Unix-style). git can be configured to do this automatically."
+    exit 1
+fi
+
+exit 0