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      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 
     38 import optparse
     39 
     40 
     41 def 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 
     66 def 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 
     74 if __name__ == "__main__":
     75   main()
     76