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bzrlib/patch.py
 
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import errno
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import os
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from subprocess import Popen, PIPE
 
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from bzrlib.errors import NoDiff3
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"""
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Diff and patch functionality
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"""
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__docformat__ = "restructuredtext"
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def write_to_cmd(args, input=""):
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    process = Popen(args, bufsize=len(input), stdin=PIPE, stdout=PIPE,
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                    stderr=PIPE, close_fds=True)
 
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    if os.name != 'nt':
 
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        process = Popen(args, bufsize=len(input), stdin=PIPE, stdout=PIPE,
 
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                        stderr=PIPE, close_fds=True)
 
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    else:
 
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        process = Popen(args, bufsize=len(input), stdin=PIPE, stdout=PIPE,
 
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                        stderr=PIPE)
 
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    stdout, stderr = process.communicate(input)
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    status = process.wait()
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    if status < 0:
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    add_label(args, "ANCESTOR")
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    add_label(args, "MERGE-SOURCE")
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    args.extend((mine_path, older_path, yours_path))
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    output, stderr, status = write_to_cmd(args)
 
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    try:
 
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        output, stderr, status = write_to_cmd(args)
 
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    except OSError, e:
 
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        if e.errno == errno.ENOENT:
 
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            raise NoDiff3
 
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        else:
 
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            raise
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    if status not in (0, 1):
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        raise Exception(stderr)
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    file(out_file, "wb").write(output)