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# Copyright 2021 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Displays a trace file in a browser.
"""
import os
import sys
import logging
import subprocess
import webbrowser
def DisplayInBrowser(trace_file, trace_format='proto'):
"""Displays trace in browser.
Args:
trace_file: Saved trace filename.
trace_format: Storage format of trace file.
"""
if trace_format == 'json':
raise Exception('The --view option and --trace_format=json are not'
'supported together')
if trace_format == 'proto':
logging.info('Opening trace in browser')
open_trace_ui_path = os.path.join(
os.path.dirname(__file__), os.pardir, os.pardir,
'third_party/perfetto/tools/open_trace_in_ui')
trace_file_path = os.path.abspath(trace_file)
cmd = [open_trace_ui_path, '-i', trace_file_path]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stderr = p.communicate()[1]
if p.returncode != 0:
raise RuntimeError('failed: ' + stderr)
elif sys.platform == 'darwin':
os.system('/usr/bin/open %s' % os.path.abspath(trace_file))
else:
webbrowser.open(trace_file)
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