llvm/clang-tools-extra/pseudo/test/lit.cfg.py

import lit.llvm

lit.llvm.initialize(lit_config, config)
lit.llvm.llvm_config.use_default_substitutions()

config.name = "ClangPseudo"
config.suffixes = [".test", ".c", ".cpp"]
config.excludes = ["Inputs"]
config.test_format = lit.formats.ShTest(not lit.llvm.llvm_config.use_lit_shell)
config.test_source_root = config.clang_pseudo_source_dir + "/test"
config.test_exec_root = config.clang_pseudo_binary_dir + "/test"

config.environment["PATH"] = os.path.pathsep.join(
    (config.clang_tools_dir, config.llvm_tools_dir, config.environment["PATH"])
)

# It is not realistically possible to account for all options that could
# possibly be present in system and user configuration files, so disable
# default configs for the test runs.
config.environment["CLANG_NO_DEFAULT_CONFIG"] = "1"