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#!/usr/bin/python
# Copyright (c) 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.
"""Module that finds and runs a binary by looking in the likely locations."""
import os
import subprocess
import sys
def run_command(args):
"""Runs a program from the command line and returns stdout.
Args:
args: Command line to run, as a list of string parameters. args[0] is the
binary to run.
Returns:
stdout from the program, as a single string.
Raises:
Exception: the program exited with a nonzero return code.
"""
proc = subprocess.Popen(args,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(stdout, stderr) = proc.communicate()
if proc.returncode is not 0:
raise Exception('command "%s" failed: %s' % (args, stderr))
return stdout
def find_path_to_program(program):
"""Returns path to an existing program binary.
Args:
program: Basename of the program to find (e.g., 'render_pictures').
Returns:
Absolute path to the program binary, as a string.
Raises:
Exception: unable to find the program binary.
"""
trunk_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
os.pardir))
possible_paths = [os.path.join(trunk_path, 'out', 'Release', program),
os.path.join(trunk_path, 'out', 'Debug', program),
os.path.join(trunk_path, 'out', 'Release',
program + '.exe'),
os.path.join(trunk_path, 'out', 'Debug',
program + '.exe')]
for try_path in possible_paths:
if os.path.isfile(try_path):
return try_path
raise Exception('cannot find %s in paths %s; maybe you need to '
'build %s?' % (program, possible_paths, program))
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