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#!/usr/bin/env python
# Copyright 2015 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.
"""Produces a dot file showing dependency relationships between modules.
The dot file contains a text-based representation of a directed graph that
explains why given module names were included in a trace_viewer config.
Example usage:
$ ./why_imported tracing.ui.analysis.analysis_view > ~/analysis_view.dot
This can then be converted to a graphical representation with the dot tool:
$ dot -Grankdir=LR -Tpng ~/analysis_view.dot -o ~/analysis_view.png
"""
import os
import sys
import argparse
def Main():
project = tracing_project.TracingProject()
parser = argparse.ArgumentParser(
usage='%(prog)s <options> moduleNames', epilog=__doc__)
parser.add_argument('--config', choices=project.GetConfigNames())
parser.add_argument('module_names', nargs='+')
args = parser.parse_args()
if args.config:
names = [project.GetModuleNameForConfigName(options.config)]
vulcanizer = project.CreateVulcanizer()
load_sequence = vulcanizer.CalcLoadSequenceForModuleNames(names)
else:
parser.error('No config specified.')
print vulcanizer.GetDominatorGraphForModulesNamed(
args.module_names, load_sequence)
if __name__ == '__main__':
tracing_path = os.path.abspath(os.path.join(
os.path.dirname(os.path.realpath(__file__)), '..'))
sys.path.append(tracing_path)
import tracing_project
tracing_project.UpdateSysPathIfNeeded()
sys.exit(Main())
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