ci, iwyu: Treat warnings as errors for specific targets

Currently, this applies only to the `bitcoin_clientversion` and
`bitcoin_crypto` targets.

ci/test/03_test_script.sh

@@ -170,6 +170,7 @@ if [ "${RUN_TIDY}" = "true" ]; then
     echo "^^^ ⚠️ Failure generated from clang-tidy"
     false
   fi
+
   # Filter out:
   # * qt qrc and moc generated files
   jq 'map(select(.file | test("src/qt/qrc_.*\\.cpp$|/moc_.*\\.cpp$") | not))' "${BASE_BUILD_DIR}/compile_commands.json" > tmp.json
@@ -180,6 +181,13 @@ if [ "${RUN_TIDY}" = "true" ]; then
            -- -Xiwyu --cxx17ns -Xiwyu --mapping_file="${BASE_ROOT_DIR}/contrib/devtools/iwyu/bitcoin.core.imp" \
            -Xiwyu --max_line_length=160 \
            2>&1 | tee /tmp/iwyu_ci.out
+
+  # TODO: Expand the following list to all targets.
+  TARGETS_WITH_FORCED_IWYU="bitcoin_clientversion bitcoin_crypto"
+  cd "${BASE_BUILD_DIR}"
+  bash -c "cmake -S ${BASE_ROOT_DIR} -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE=\"include-what-you-use;-Xiwyu;--cxx17ns;-Xiwyu;--mapping_file=${BASE_ROOT_DIR}/contrib/devtools/iwyu/bitcoin.core.imp;-Xiwyu;--error\""
+  bash -c "cmake --build . ${MAKEJOBS} --clean-first --target ${TARGETS_WITH_FORCED_IWYU}"
+
   cd "${BASE_ROOT_DIR}/src"
   python3 "/include-what-you-use/fix_includes.py" --nosafe_headers < /tmp/iwyu_ci.out
   git --no-pager diff