1b5cfb5ba3
Built from: 45f4d3fa8a2f61cc092ae461aac4cac1bab4ac6706f98274ea7f314dd315c6d0 cmake-3.1.3.tar.gz Also drop in an extraction script. Change-Id: I3487e9d432290a7dbabf854b927412c58c35d12b Reviewed-on: https://boringssl-review.googlesource.com/3492 Reviewed-by: Adam Langley <agl@google.com>
121 lines
3.5 KiB
Python
121 lines
3.5 KiB
Python
# Copyright (c) 2015, Google Inc.
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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"""Extracts archives."""
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import os
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import os.path
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import tarfile
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import shutil
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import sys
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import zipfile
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def FixPath(output, path):
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"""
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FixPath removes the first directory from path and returns the it and the
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concatenation of output and the remainder. It does sanity checks to ensure
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the resulting path is under output, but shouldn't be used on untrusted input.
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"""
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# Even on Windows, zip files must always use forward slashes.
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if '\\' in path or path.startswith('/'):
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raise ValueError(path)
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first, rest = path.split('/', 1)
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rest = os.path.normpath(rest)
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if os.path.isabs(rest) or rest.startswith('.'):
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raise ValueError(rest)
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return first, os.path.join(output, rest)
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def IterateZip(path):
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"""
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IterateZip opens the zip file at path and returns a generator of
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(filename, mode, fileobj) tuples for each file in it.
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"""
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with zipfile.ZipFile(path, 'r') as zip_file:
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for info in zip_file.infolist():
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yield (info.filename, None, zip_file.open(info))
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def IterateTar(path):
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"""
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IterateTar opens the tar.gz file at path and returns a generator of
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(filename, mode, fileobj) tuples for each file in it.
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"""
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with tarfile.open(path, 'r:gz') as tar_file:
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for info in tar_file:
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if info.isdir():
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continue
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if not info.isfile():
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raise ValueError('Unknown entry type "%s"' % (info.name, ))
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yield (info.name, info.mode, tar_file.extractfile(info))
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def main(args):
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if len(args) != 3:
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print >> sys.stderr, 'Usage: %s ARCHIVE OUTPUT' % (args[0],)
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return 1
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_, archive, output = args
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if not os.path.exists(archive):
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# Skip archives that weren't downloaded.
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return 0
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if archive.endswith('.zip'):
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entries = IterateZip(archive)
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elif archive.endswith('.tar.gz'):
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entries = IterateTar(archive)
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else:
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raise ValueError(archive)
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try:
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if os.path.exists(output):
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print "Removing %s" % (output, )
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shutil.rmtree(output)
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print "Extracting %s to %s" % (archive, output)
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prefix = None
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for path, mode, inp in entries:
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# Pivot the path onto the output directory.
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new_prefix, fixed_path = FixPath(output, path)
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# Ensure the archive is consistent.
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if prefix is None:
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prefix = new_prefix
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if prefix != new_prefix:
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raise ValueError((prefix, new_prefix))
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# Extract the file.
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if not os.path.isdir(os.path.dirname(fixed_path)):
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os.makedirs(os.path.dirname(fixed_path))
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with open(fixed_path, 'w') as out:
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out.write(inp.read())
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# Fix up permissions if needbe.
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# TODO(davidben): To be extra tidy, this should only track the execute bit
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# as in git.
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if mode is not None:
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os.chmod(fixed_path, mode)
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finally:
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entries.close()
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return 0
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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