# -*- Python -*-

# Configuration file for the 'lit' test runner.

import os
import platform
import subprocess

import lit.formats
import lit.util

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

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

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

###

# 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 'clang_unit_site_config' user parameter, and use that if available.
    site_cfg = lit_config.params.get('clang_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()
    clang_src_root = os.path.join(llvm_src_root, "tools", "clang")
    clang_obj_root = os.path.join(llvm_obj_root, "tools", "clang")

    # Validate that we got a tree which points to here, using the standard
    # tools/clang layout.
    this_src_root = os.path.join(os.path.dirname(__file__),'..','..')
    if os.path.realpath(clang_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(clang_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' % clang_obj_root)
    lit_config.load_config(config, site_cfg)
    raise SystemExit

shlibpath_var = ''
if platform.system() == 'Linux':
    shlibpath_var = 'LD_LIBRARY_PATH'
elif platform.system() == 'Darwin':
    shlibpath_var = 'DYLD_LIBRARY_PATH'
elif platform.system() == 'Windows':
    shlibpath_var = 'PATH'

# in stand-alone builds, shlibdir is clang's build tree
# while llvm_libs_dir is installed LLVM (and possibly older clang)
llvm_shlib_dir = getattr(config, 'shlibdir', None)
if not llvm_shlib_dir:
    lit_config.fatal('No shlibdir set!')
# Point the dynamic loader at dynamic libraries in 'lib'.
llvm_libs_dir = getattr(config, 'llvm_libs_dir', None)
if not llvm_libs_dir:
    lit_config.fatal('No LLVM libs dir set!')
shlibpath = os.path.pathsep.join((llvm_shlib_dir, llvm_libs_dir,
                                 config.environment.get(shlibpath_var,'')))

config.environment[shlibpath_var] = shlibpath