Add logging to run_tests.py and fix pylint issues.

Test: ./run_tests.py
Bug: http://b/34740564
Change-Id: I9ae1d2d386842e088db963b2b4eb611450cbe514

run_tests.py

@@ -0,0 +1,148 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""Runs the libc++ tests against the platform libc++."""
+from __future__ import print_function
+
+import argparse
+import logging
+import os
+import sys
+
+
+THIS_DIR = os.path.dirname(os.path.realpath(__file__))
+ANDROID_DIR = os.path.realpath(os.path.join(THIS_DIR, '../..'))
+
+
+def logger():
+    """Returns the logger for the module."""
+    return logging.getLogger(__name__)
+
+
+def call(cmd, *args, **kwargs):
+    """subprocess.call with logging."""
+    import subprocess
+    logger().info('call %s', ' '.join(cmd))
+    return subprocess.call(cmd, *args, **kwargs)
+
+
+def check_call(cmd, *args, **kwargs):
+    """subprocess.check_call with logging."""
+    import subprocess
+    logger().info('check_call %s', ' '.join(cmd))
+    return subprocess.check_call(cmd, *args, **kwargs)
+
+
+class ArgParser(argparse.ArgumentParser):
+    """Parses command line arguments."""
+    def __init__(self):
+        super(ArgParser, self).__init__()
+        self.add_argument(
+            '--compiler', choices=('clang', 'gcc'), default='clang')
+        self.add_argument(
+            '--bitness', choices=(32, 64), type=int, default=32)
+        self.add_argument('--host', action='store_true')
+
+
+def gen_test_config(bitness, compiler, host):
+    """Generates the test configuration makefile for buildcmds."""
+    testconfig_mk_path = os.path.join(THIS_DIR, 'buildcmds/testconfig.mk')
+    with open(testconfig_mk_path, 'w') as test_config:
+        if compiler == 'clang':
+            print('LOCAL_CLANG := true', file=test_config)
+        elif compiler == 'gcc':
+            print('LOCAL_CLANG := false', file=test_config)
+
+        if bitness == 32:
+            print('LOCAL_MULTILIB := 32', file=test_config)
+        elif bitness == 64:
+            print('LOCAL_MULTILIB := 64', file=test_config)
+
+        if compiler == 'clang':
+            print('LOCAL_CXX := $(LOCAL_PATH)/buildcmdscc $(CLANG_CXX)',
+                  file=test_config)
+        else:
+            if host:
+                prefix = 'HOST_'
+            else:
+                prefix = 'TARGET_'
+            print('LOCAL_CXX := $(LOCAL_PATH)/buildcmdscc '
+                  '$($(LOCAL_2ND_ARCH_VAR_PREFIX){}CXX)'.format(prefix),
+                  file=test_config)
+
+        if host:
+            print('include $(BUILD_HOST_EXECUTABLE)', file=test_config)
+        else:
+            print('include $(BUILD_EXECUTABLE)', file=test_config)
+
+
+def mmm(path):
+    """Invokes the Android build command mmm."""
+    makefile = os.path.join(path, 'Android.mk')
+    main_mk = 'build/core/main.mk'
+
+    env = dict(os.environ)
+    env['ONE_SHOT_MAKEFILE'] = makefile
+    env['LIBCXX_TESTING'] = 'true'
+    cmd = [
+        'make', '-j', '-C', ANDROID_DIR, '-f', main_mk,
+        'MODULES-IN-' + path.replace('/', '-'),
+    ]
+    check_call(cmd, env=env)
+
+
+def gen_build_cmds(bitness, compiler, host):
+    """Generates the build commands file for the test runner."""
+    gen_test_config(bitness, compiler, host)
+    mmm('external/libcxx/buildcmds')
+
+
+def main():
+    """Program entry point."""
+    logging.basicConfig(level=logging.INFO)
+
+    args, lit_args = ArgParser().parse_known_args()
+    lit_path = os.path.join(ANDROID_DIR, 'external/llvm/utils/lit/lit.py')
+    gen_build_cmds(args.bitness, args.compiler, args.host)
+
+    mode_str = 'host' if args.host else 'device'
+    android_mode_arg = '--param=android_mode=' + mode_str
+    site_cfg_path = os.path.join(THIS_DIR, 'test/lit.site.cfg')
+    site_cfg_arg = '--param=libcxx_site_config=' + site_cfg_path
+    default_test_path = os.path.join(THIS_DIR, 'test')
+
+    have_filter_args = False
+    for arg in lit_args:
+        # If the argument is a valid path with default_test_path, it is a test
+        # filter.
+        real_path = os.path.realpath(arg)
+        if not real_path.startswith(default_test_path):
+            continue
+        if not os.path.exists(real_path):
+            continue
+
+        have_filter_args = True
+        break  # No need to keep scanning.
+
+    lit_args = ['-sv', android_mode_arg, site_cfg_arg] + lit_args
+    cmd = ['python', lit_path] + lit_args
+    if not have_filter_args:
+        cmd.append(default_test_path)
+    sys.exit(call(cmd))
+
+
+if __name__ == '__main__':
+    main()