check-sources

#!/bin/bash
#####################################################################################
# (c) Copyright 1998-2023 CERN for the benefit of the LHCb and ATLAS collaborations #
#                                                                                   #
# This software is distributed under the terms of the Apache version 2 licence,     #
# copied verbatim in the file "LICENSE".                                            #
#                                                                                   #
# In applying this licence, CERN does not waive the privileges and immunities       #
# granted to it by virtue of its status as an Intergovernmental Organization        #
# or submit itself to any jurisdiction.                                             #
#####################################################################################
set -eo pipefail

build_file="$1"
IFS=$'\n'

# Find sources not explicitly referenced from CMakeLists.txt files
not_in_cmakelists=()
for package in $($git ls-files -- '*/CMakeLists.txt' ':!:cmake/'); do
  dir=$(dirname $package)
  pushd "$dir" >/dev/null
  missing=$(git ls-files --cached --others '*.cpp' ':!:*/contrib/*' | \
    xargs -n1 -I_path bash -c \
      "git grep -q '_path' -- CMakeLists.txt || echo $dir/_path")
  if [ -n "$missing" ]; then
    not_in_cmakelists+=($missing)
  fi
  popd >/dev/null
done

# If a build file is given, filter only sources not mentioned there
not_in_build=()
for src in ${not_in_cmakelists[@]}; do
  if ! grep -q "$src" "$build_file" 2>/dev/null; then
    not_in_build+=($src)
  fi
done

if [ -n "$not_in_build" ]; then
  echo -e "Found potentially unused sources:\n"
  printf '%s\n' "${not_in_build[@]}"
  exit 1
fi