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generate_coverage.py
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generate_coverage.py
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#!/usr/bin/env python
#
# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import sys
import subprocess
import os
import argparse
import errno
import shutil
def GetLLVMBinDirectory():
buildtool_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), "../../buildtools")
platform_dir = ""
if sys.platform.startswith('linux'):
platform_dir = "linux-x64"
elif sys.platform == 'darwin':
platform_dir = "mac-x64"
else:
raise Exception("Unknown/Unsupported platform.")
llvm_bin_dir = os.path.abspath(os.path.join(buildtool_dir, platform_dir, "clang/bin"))
if not os.path.exists(llvm_bin_dir):
raise Exception("LLVM directory %s double not be located." % llvm_bin_dir)
return llvm_bin_dir
def MakeDirs(new_dir):
"""A wrapper around os.makedirs() that emulates "mkdir -p"."""
try:
os.makedirs(new_dir)
except OSError as e:
if e.errno != errno.EEXIST:
raise
def RemoveIfExists(path):
if os.path.isdir(path) and not os.path.islink(path):
shutil.rmtree(path)
elif os.path.exists(path):
os.remove(path)
def main():
parser = argparse.ArgumentParser();
parser.add_argument('-t', '--tests', nargs='+', dest='tests',
required=True, help='The unit tests to run and gather coverage data on.')
parser.add_argument('-o', '--output', dest='output',
required=True, help='The output directory for coverage results.')
parser.add_argument('-f', '--format', type=str, choices=['all', 'html', 'summary', 'lcov'],
required=True, help='The type of coverage information to be displayed.')
args = parser.parse_args()
output = os.path.abspath(args.output)
MakeDirs(output)
generate_all_reports = args.format == "all"
raw_profiles = []
binaries = []
# Run all unit tests and collect raw profiles.
for test in args.tests:
absolute_test_path = os.path.abspath(test)
if not os.path.exists(absolute_test_path):
print("Path %s does not exist." % absolute_test_path)
return -1
binaries.append(absolute_test_path)
raw_profile = absolute_test_path + ".rawprofile"
RemoveIfExists(raw_profile)
print "Running test %s to gather profile." % os.path.basename(absolute_test_path)
subprocess.check_call([absolute_test_path], env={
"LLVM_PROFILE_FILE": raw_profile
})
if not os.path.exists(raw_profile):
print("Could not find raw profile data for unit test run %s." % test)
print("Did you build with the --coverage flag?")
return -1
raw_profiles.append(raw_profile)
if len(raw_profiles) == 0:
print("No raw profiles could be generated.")
return -1
binaries_flag = []
for binary in binaries:
binaries_flag.append('-object')
binaries_flag.append(binary)
llvm_bin_dir = GetLLVMBinDirectory()
# Merge all raw profiles into a single profile.
profdata_binary = os.path.join(llvm_bin_dir, "llvm-profdata")
print("Merging %d raw profile(s) into single profile." % len(raw_profiles))
merged_profile_path = os.path.join(output, "all.profile")
RemoveIfExists(merged_profile_path)
merge_command = [profdata_binary, "merge", "-sparse"] + raw_profiles + ["-o", merged_profile_path]
subprocess.check_call(merge_command)
print("Done.")
if not os.path.exists(merged_profile_path):
print("Could not generate or find merged profile %s." % merged_profile_path)
return -1
llvm_cov_binary = os.path.join(llvm_bin_dir, "llvm-cov")
instr_profile_flag = "-instr-profile=%s" % merged_profile_path
ignore_flags = "-ignore-filename-regex=third_party|unittest|fixture"
# Generate the HTML report if specified.
if generate_all_reports or args.format == 'html':
print("Generating HTML report.")
show_command = [llvm_cov_binary, "show"] + binaries_flag + [
instr_profile_flag,
"-format=html",
"-output-dir=%s" % output,
"-tab-size=2",
ignore_flags,
]
subprocess.check_call(show_command)
print("Done.")
# Generate a report summary if specified.
if generate_all_reports or args.format == 'summary':
print("Generating a summary report.")
report_command = [llvm_cov_binary, "report"] + binaries_flag + [
instr_profile_flag,
ignore_flags,
]
subprocess.check_call(report_command)
print("Done.")
# Generate a lcov summary if specified.
if generate_all_reports or args.format == 'lcov':
print("Generating LCOV report.")
lcov_file = os.path.join(output, 'coverage.lcov')
RemoveIfExists(lcov_file)
lcov_command = [llvm_cov_binary, "export"] + binaries_flag + [
instr_profile_flag,
ignore_flags,
"-format=lcov",
]
with open(lcov_file, 'w') as lcov_redirect:
subprocess.check_call(lcov_command, stdout=lcov_redirect)
print("Done.")
return 0
if __name__ == '__main__':
sys.exit(main())