1#!/usr/bin/env python 2# 3# Copyright 2014 the V8 project authors. All rights reserved. 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: 7# 8# * Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# * Redistributions in binary form must reproduce the above 11# copyright notice, this list of conditions and the following 12# disclaimer in the documentation and/or other materials provided 13# with the distribution. 14# * Neither the name of Google Inc. nor the names of its 15# contributors may be used to endorse or promote products derived 16# from this software without specific prior written permission. 17# 18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30# This utility concatenates several files into one. On Unix-like systems 31# it is equivalent to: 32# cat file1 file2 file3 ...files... > target 33# 34# The reason for writing a seperate utility is that 'cat' is not available 35# on all supported build platforms, but Python is, and hence this provides 36# us with an easy and uniform way of doing this on all platforms. 37 38import optparse 39 40 41def Concatenate(filenames): 42 """Concatenate files. 43 44 Args: 45 files: Array of file names. 46 The last name is the target; all earlier ones are sources. 47 48 Returns: 49 True, if the operation was successful. 50 """ 51 if len(filenames) < 2: 52 print "An error occured generating %s:\nNothing to do." % filenames[-1] 53 return False 54 55 try: 56 with open(filenames[-1], "wb") as target: 57 for filename in filenames[:-1]: 58 with open(filename, "rb") as current: 59 target.write(current.read()) 60 return True 61 except IOError as e: 62 print "An error occured when writing %s:\n%s" % (filenames[-1], e) 63 return False 64 65 66def main(): 67 parser = optparse.OptionParser() 68 parser.set_usage("""Concatenate several files into one. 69 Equivalent to: cat file1 ... > target.""") 70 (options, args) = parser.parse_args() 71 exit(0 if Concatenate(args) else 1) 72 73 74if __name__ == "__main__": 75 main() 76