# -*- Python -*-

# Configuration file for the 'lit' test runner.

import os
import subprocess

import lit.formats

# name: The name of this test suite.
config.name = 'LLVM-Unit'

# suffixes: A list of file extensions to treat as test files.
config.suffixes = []

# is_early; Request to run this suite early.
config.is_early = True

# test_source_root: The root path where tests are located.
# test_exec_root: The root path where tests should be run.
llvm_obj_root = getattr(config, 'llvm_obj_root', None)
if llvm_obj_root is not None:
    config.test_exec_root = os.path.join(llvm_obj_root, 'unittests')
    config.test_source_root = config.test_exec_root

# testFormat: The test format to use to interpret tests.
llvm_build_mode = getattr(config, 'llvm_build_mode', "Debug")
config.test_format = lit.formats.GoogleTest(llvm_build_mode, 'Tests')

# Propagate the temp directory. Windows requires this because it uses \Windows\
# if none of these are present.
if 'TMP' in os.environ:
    config.environment['TMP'] = os.environ['TMP']
if 'TEMP' in os.environ:
    config.environment['TEMP'] = os.environ['TEMP']

# Propagate path to symbolizer for ASan/MSan.
for symbolizer in ['ASAN_SYMBOLIZER_PATH', 'MSAN_SYMBOLIZER_PATH']:
    if symbolizer in os.environ:
        config.environment[symbolizer] = os.environ[symbolizer]

# Win32 seeks DLLs along %PATH%.
if sys.platform in ['win32', 'cygwin'] and os.path.isdir(config.shlibdir):
    config.environment['PATH'] = os.path.pathsep.join((
            config.shlibdir, config.environment['PATH']))

# Win32 may use %SYSTEMDRIVE% during file system shell operations, so propogate.
if sys.platform == 'win32' and 'SYSTEMDRIVE' in os.environ:
    config.environment['SYSTEMDRIVE'] = os.environ['SYSTEMDRIVE']

###

# Check that the object root is known.
if config.test_exec_root is None:
    # Otherwise, we haven't loaded the site specific configuration (the user is
    # probably trying to run on a test file directly, and either the site
    # configuration hasn't been created by the build system, or we are in an
    # out-of-tree build situation).

    # Check for 'llvm_unit_site_config' user parameter, and use that if available.
    site_cfg = lit_config.params.get('llvm_unit_site_config', None)
    if site_cfg and os.path.exists(site_cfg):
        lit_config.load_config(config, site_cfg)
        raise SystemExit

    # Try to detect the situation where we are using an out-of-tree build by
    # looking for 'llvm-config'.
    #
    # FIXME: I debated (i.e., wrote and threw away) adding logic to
    # automagically generate the lit.site.cfg if we are in some kind of fresh
    # build situation. This means knowing how to invoke the build system
    # though, and I decided it was too much magic.

    llvm_config = lit.util.which('llvm-config', config.environment['PATH'])
    if not llvm_config:
        lit_config.fatal('No site specific configuration available!')

    # Get the source and object roots.
    llvm_src_root = subprocess.check_output(['llvm-config', '--src-root']).strip()
    llvm_obj_root = subprocess.check_output(['llvm-config', '--obj-root']).strip()

    # Validate that we got a tree which points to here.
    this_src_root = os.path.join(os.path.dirname(__file__),'..','..')
    if os.path.realpath(llvm_src_root) != os.path.realpath(this_src_root):
        lit_config.fatal('No site specific configuration available!')

    # Check that the site specific configuration exists.
    site_cfg = os.path.join(llvm_obj_root, 'test', 'Unit', 'lit.site.cfg')
    if not os.path.exists(site_cfg):
        lit_config.fatal('No site specific configuration available!')

    # Okay, that worked. Notify the user of the automagic, and reconfigure.
    lit_config.note('using out-of-tree build at %r' % llvm_obj_root)
    lit_config.load_config(config, site_cfg)
    raise SystemExit