ccb52c2961
These changes make the execution abort earlier on an error (like a tool is not found) and makes it easier to figure out what's wrong. Made build_zxing.py executable. BUG=None TEST=Local runs of the PyAuto test src/chrome/test/functional/webrtc_video_quality.py in Chromium. Review URL: https://webrtc-codereview.appspot.com/840005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@2899 4adac7df-926f-26a2-2b94-8c16560cd09d
117 lines
3.6 KiB
Python
117 lines
3.6 KiB
Python
#!/usr/bin/env python
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# Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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#
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# Use of this source code is governed by a BSD-style license
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# that can be found in the LICENSE file in the root of the source
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# tree. An additional intellectual property rights grant can be found
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# in the file PATENTS. All contributing project authors may
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# be found in the AUTHORS file in the root of the source tree.
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import os
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import subprocess
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import sys
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_DEFAULT_PADDING = 4
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class HelperError(Exception):
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"""Exception raised for errors in the helper."""
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pass
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def zero_pad(number, padding=_DEFAULT_PADDING):
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"""Converts an int into a zero padded string.
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Args:
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number(int): The number to convert.
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padding(int): The number of chars in the output. Note that if you pass for
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example number=23456 and padding=4, the output will still be '23456',
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i.e. it will not be cropped. If you pass number=2 and padding=4, the
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return value will be '0002'.
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Return:
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(string): The zero padded number converted to string.
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"""
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return str(number).zfill(padding)
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def run_shell_command(command, msg=None):
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"""Executes a command.
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Args:
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command(list): Command list to execute.
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msg(string): Message describing the error in case the command fails.
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Return:
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(string): The standard output from running the command.
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Raise:
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HelperError: If command fails.
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"""
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cmd_list = [str(x) for x in command]
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cmd = ' '.join(cmd_list)
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process = subprocess.Popen(cmd_list, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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output, error = process.communicate()
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if process.returncode != 0:
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if msg:
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print >> sys.stderr, msg
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raise HelperError('Failed to run %s: command returned %d and printed '
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'%s and %s' % (cmd, process.returncode, output, error))
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return output.strip()
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def form_jars_string(path_to_zxing):
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"""Forms the the Zxing core and javase jars argument.
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Args:
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path_to_zxing(string): The path to the Zxing checkout folder.
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Return:
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(string): The newly formed jars argument.
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"""
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javase_jar = os.path.join(path_to_zxing, "javase", "javase.jar")
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core_jar = os.path.join(path_to_zxing, "core", "core.jar")
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delimiter = ':'
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if os.name != 'posix':
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delimiter = ';'
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return javase_jar + delimiter + core_jar
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def perform_action_on_all_files(directory, file_pattern, file_extension,
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start_number, action, **kwargs):
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"""Function that performs a given action on all files matching a pattern.
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It is assumed that the files are named file_patternxxxx.file_extension, where
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xxxx are digits. The file names start from
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file_patern0..start_number>.file_extension.
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Args:
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directory(string): The directory where the files live.
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file_pattern(string): The name pattern of the files.
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file_extension(string): The files' extension.
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start_number(int): From where to start to count frames.
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action(function): The action to be performed over the files. Must return
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False if the action failed, True otherwise.
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Return:
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(bool): Whether performing the action over all files was successful or not.
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"""
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file_prefix = os.path.join(directory, file_pattern)
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file_exists = True
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file_number = start_number
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errors = False
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while file_exists:
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zero_padded_file_number = zero_pad(file_number)
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file_name = file_prefix + zero_padded_file_number + '.' + file_extension
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if os.path.isfile(file_name):
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if not action(file_name=file_name, **kwargs):
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errors = True
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break
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file_number += 1
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else:
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file_exists = False
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return not errors
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