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# Copyright 2014 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.
import gzip
import json
import os
import shutil
import sys
import zipfile
from profile_chrome import util
from pylib import constants
sys.path.append(os.path.join(constants.DIR_SOURCE_ROOT,
'third_party',
'trace-viewer'))
# pylint: disable=F0401
from trace_viewer.build import trace2html
def _PackageTracesAsHtml(trace_files, html_file):
with open(html_file, 'w') as f:
trace2html.WriteHTMLForTracesToFile(trace_files, f)
for trace_file in trace_files:
os.unlink(trace_file)
def _CompressFile(host_file, output):
with gzip.open(output, 'wb') as out, \
open(host_file, 'rb') as input_file:
out.write(input_file.read())
os.unlink(host_file)
def _ArchiveFiles(host_files, output):
with zipfile.ZipFile(output, 'w', zipfile.ZIP_DEFLATED) as z:
for host_file in host_files:
z.write(host_file)
os.unlink(host_file)
def _MergeTracesIfNeeded(trace_files):
if len(trace_files) <= 1:
return trace_files
merge_candidates = []
for trace_file in trace_files:
with open(trace_file) as f:
# Try to detect a JSON file cheaply since that's all we can merge.
if f.read(1) != '{':
continue
f.seek(0)
try:
json_data = json.load(f)
except ValueError:
continue
merge_candidates.append((trace_file, json_data))
if len(merge_candidates) <= 1:
return trace_files
other_files = [f for f in trace_files
if not f in [c[0] for c in merge_candidates]]
merged_file, merged_data = merge_candidates[0]
for trace_file, json_data in merge_candidates[1:]:
for key, value in json_data.items():
if not merged_data.get(key) or json_data[key]:
merged_data[key] = value
os.unlink(trace_file)
with open(merged_file, 'w') as f:
json.dump(merged_data, f)
return [merged_file] + other_files
def PackageTraces(trace_files, output=None, compress=False, write_json=False):
trace_files = _MergeTracesIfNeeded(trace_files)
if not write_json:
html_file = os.path.splitext(trace_files[0])[0] + '.html'
_PackageTracesAsHtml(trace_files, html_file)
trace_files = [html_file]
if compress and len(trace_files) == 1:
result = output or trace_files[0] + '.gz'
_CompressFile(trace_files[0], result)
elif len(trace_files) > 1:
result = output or 'chrome-combined-trace-%s.zip' % util.GetTraceTimestamp()
_ArchiveFiles(trace_files, result)
elif output:
result = output
shutil.move(trace_files[0], result)
else:
result = trace_files[0]
return result
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