in jenkins-pipeline-shared-libraries/vars/githubscm.groovy [464:480]
def findAndStageNotIgnoredFiles(String findNamePattern) {
// based on https://stackoverflow.com/a/59888964/8811872
sh """
find . -type f -name '${findNamePattern}' > found_files.txt
files_to_add=""
while IFS= read -r file; do
if ! git check-ignore -q "\$file"; then
files_to_add="\$files_to_add \$file"
fi
done < found_files.txt
rm found_files.txt
if [ ! -z "\$files_to_add" ]; then
git add \$files_to_add
fi
git status
"""
}