# -*- Python -*-

import os
import platform
import re
import subprocess

import lit.formats
import lit.util

# Configuration file for the 'lit' test runner.

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

# Tweak PATH for Win32
if platform.system() == 'Windows':
    # Seek sane tools in directories and set to $PATH.
    path = getattr(config, 'lit_tools_dir', None)
    path = lit_config.getToolsPath(path,
                                   config.environment['PATH'],
                                   ['cmp.exe', 'grep.exe', 'sed.exe'])
    if path is not None:
        path = os.path.pathsep.join((path,
                                     config.environment['PATH']))
        config.environment['PATH'] = path

# Choose between lit's internal shell pipeline runner and a real shell.  If
# LIT_USE_INTERNAL_SHELL is in the environment, we use that as an override.
use_lit_shell = os.environ.get("LIT_USE_INTERNAL_SHELL")
if use_lit_shell:
    # 0 is external, "" is default, and everything else is internal.
    execute_external = (use_lit_shell == "0")
else:
    # Otherwise we default to internal on Windows and external elsewhere, as
    # bash on Windows is usually very slow.
    execute_external = (not sys.platform in ['win32'])

# testFormat: The test format to use to interpret tests.
#
# For now we require '&&' between commands, until they get globally killed and
# the test runner updated.
config.test_format = lit.formats.ShTest(execute_external)

# suffixes: A list of file extensions to treat as test files.
config.suffixes = ['.c', '.cpp', '.m', '.mm', '.cu', '.ll', '.cl', '.s', '.modularize', '.module-map-checker']

# Test-time dependencies located in directories called 'Inputs' are excluded
# from test suites; there won't be any lit tests within them.
config.excludes = ['Inputs']

# test_source_root: The root path where tests are located.
config.test_source_root = os.path.dirname(__file__)

# test_exec_root: The root path where tests should be run.
clang_tools_binary_dir = getattr(config, 'clang_tools_binary_dir', None)
if clang_tools_binary_dir is not None:
    config.test_exec_root = os.path.join(clang_tools_binary_dir, 'test')

# Clear some environment variables that might affect Clang.
#
# This first set of vars are read by Clang, but shouldn't affect tests
# that aren't specifically looking for these features, or are required
# simply to run the tests at all.
#
# FIXME: Should we have a tool that enforces this?

# safe_env_vars = ('TMPDIR', 'TEMP', 'TMP', 'USERPROFILE', 'PWD',
#                  'MACOSX_DEPLOYMENT_TARGET', 'IPHONEOS_DEPLOYMENT_TARGET',
#                  'IOS_SIMULATOR_DEPLOYMENT_TARGET',
#                  'VCINSTALLDIR', 'VC100COMNTOOLS', 'VC90COMNTOOLS',
#                  'VC80COMNTOOLS')
possibly_dangerous_env_vars = ['COMPILER_PATH', 'RC_DEBUG_OPTIONS',
                               'CINDEXTEST_PREAMBLE_FILE', 'LIBRARY_PATH',
                               'CPATH', 'C_INCLUDE_PATH', 'CPLUS_INCLUDE_PATH',
                               'OBJC_INCLUDE_PATH', 'OBJCPLUS_INCLUDE_PATH',
                               'LIBCLANG_TIMING', 'LIBCLANG_OBJTRACKING',
                               'LIBCLANG_LOGGING', 'LIBCLANG_BGPRIO_INDEX',
                               'LIBCLANG_BGPRIO_EDIT', 'LIBCLANG_NOTHREADS',
                               'LIBCLANG_RESOURCE_USAGE',
                               'LIBCLANG_CODE_COMPLETION_LOGGING']
# Clang/Win32 may refer to %INCLUDE%. vsvarsall.bat sets it.
if platform.system() != 'Windows':
    possibly_dangerous_env_vars.append('INCLUDE')
for name in possibly_dangerous_env_vars:
  if name in config.environment:
    del config.environment[name]

# Tweak the PATH to include the tools dir and the scripts dir.
if clang_tools_binary_dir is not None:
    clang_tools_dir = getattr(config, 'clang_tools_dir', None)
    if not clang_tools_dir:
        lit_config.fatal('No Clang tools dir set!')
    llvm_tools_dir = getattr(config, 'llvm_tools_dir', None)
    if not llvm_tools_dir:
        lit_config.fatal('No LLVM tools dir set!')
    path = os.path.pathsep.join((
            clang_tools_dir, llvm_tools_dir, config.environment['PATH']))
    config.environment['PATH'] = path

    llvm_libs_dir = getattr(config, 'llvm_libs_dir', None)
    if not llvm_libs_dir:
        lit_config.fatal('No LLVM libs dir set!')
    path = os.path.pathsep.join((llvm_libs_dir,
                                 config.environment.get('LD_LIBRARY_PATH','')))
    config.environment['LD_LIBRARY_PATH'] = path

###

# 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_site_config' user parameter, and use that if available.
    site_cfg = lit_config.params.get('clang_tools_extra_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. We should solve this by just having
    # the .cfg files generated during the configuration step.

    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 = lit.util.capture(['llvm-config', '--src-root']).strip()
    llvm_obj_root = lit.util.capture(['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")

    clang_tools_extra_src_root = os.path.join(clang_src_root, "tools", "extra")
    clang_tools_extra_obj_root = os.path.join(clang_obj_root, "tools", "extra")
    # Validate that we got a tree which points to here, using the standard
    # tools/clang layout.
    this_src_root = os.path.dirname(config.test_source_root)
    if os.path.realpath(clang_tools_extra_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_tools_extra_obj_root, 'test', 'lit.site.cfg')
    if not os.path.exists(site_cfg):
        lit_config.fatal(
            'No site specific configuration available! You may need to '
            'run "make test" in your Clang build directory.')

    # 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

###

import os

# When running under valgrind, we mangle '-vg' onto the end of the triple so we
# can check it with XFAIL and XTARGET.
if lit_config.useValgrind:
    config.target_triple += '-vg'

###

# Set available features we allow tests to conditionalize on.
#
# As of 2011.08, crash-recovery tests still do not pass on FreeBSD.
if platform.system() not in ['FreeBSD']:
    config.available_features.add('crash-recovery')

# Shell execution
if execute_external:
    config.available_features.add('shell')

# Exclude MSYS due to transforming '/' to 'X:/mingwroot/'.
if not platform.system() in ['Windows'] or not execute_external:
    config.available_features.add('shell-preserves-root')

# ANSI escape sequences in non-dumb terminal
if platform.system() not in ['Windows']:
    config.available_features.add('ansi-escape-sequences')

config.substitutions.append( ('%python', config.python_executable) )

import sys
# Scripts using argparse need Python 2.7.
if sys.version_info >= (2, 7):
  config.available_features.add('python27')