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#!/usr/bin/python3

# Copyright (c) 2010-2018, Benjamin Drung <bdrung@debian.org>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import argparse
import os
import sys

from devscripts.logger import Logger

try:
    import magic
except ImportError:
    Logger.error(
        "Please install 'python3-magic' in order to use this utility.")
    sys.exit(1)

DEFAULT_WHITELISTED_MIMETYPES = [
    "application/pgp-keys",
    "application/vnd.font-fontforge-sfd",  # font source: fontforge
    "application/x-elc",
    "application/x-empty",
    "application/x-font-otf",              # font object and source
    "application/x-font-ttf",              # font object and source
    "application/x-font-woff",             # font object and source
    "application/x-symlink",
    "application/xml",
    "audio/x-wav",
    "font/otf",                            # font object and source
    "font/ttf",                            # font object and source
    "image/gif",
    "image/jpeg",
    "image/png",
    "image/svg+xml",
    "image/tiff",
    "image/vnd.adobe.photoshop",
    "image/x-icns",
    "image/x-ico",
    "image/x-icon",
    "image/x-ms-bmp",
    "image/x-portable-pixmap",
    "image/x-xpmi",
    "inode/symlink",
    "inode/x-empty",
    "message/rfc822",
    "text/html",
    "text/plain",
    "text/rtf",
    "text/troff",
    "text/x-asm",
    "text/x-c",
    "text/x-c++",
    "text/x-diff",
    "text/x-fortran",
    "text/x-java",
    "text/x-lisp",
    "text/x-m4",
    "text/x-makefile",
    "text/x-msdos-batch",
    "text/x-pascal",
    "text/x-perl",
    "text/x-php",
    "text/x-po",
    "text/x-python",
    "text/x-ruby",
    "text/x-shellscript",
    "text/x-tex",
    "text/x-texinfo",
    "text/xml",
]

DEFAULT_WHITELISTED_EXTENSIONS = [
    ".el",     # elisp source files
    ".fea",    # font source format: Adobe Font Development Kit for OpenType
    ".fog",    # font source format: Fontographer
    ".g2n",    # font source format: fontforge
    ".gdh",    # font source format: Graphite (headers)
    ".gdl",    # font source format: Graphite
    ".glyph",  # font source format: cross-toolkit UFO
    ".gmo",    # GNU Machine Object File (for translations with gettext)
    ".icns",   # Apple Icon Image format
    ".java",   # Java source files
    ".plate",  # font source format: Spiro
    ".rsa",
    ".sfd",    # font source format: fontforge
    ".sfdir",  # font source format: fontforge
    ".ttx",    # font source format: fonttools
    ".ufo",    # font source format: cross-toolkit UFO
    ".vfb"     # font source format: FontLab
    ".vtp",    # font source format: OpenType (VOLT)
    ".xgf",    # font source format: Xgridfit
]

def suspicious_source(whitelisted_mimetypes, whitelisted_extensions, directory,
                      verbose=False):
    magic_cookie = magic.open(magic.MAGIC_MIME_TYPE)
    magic_cookie.load()

for root, dirs, files in os.walk(directory):
        for _file in files:
            mimetype = magic_cookie.file(os.path.join(root, _file))
            if mimetype not in whitelisted_mimetypes:
                if not [x for x in whitelisted_extensions
                        if _file.lower().endswith(x)]:
                    output = os.path.join(root, _file)
                    if verbose:
                        output += " (" + mimetype + ")"
                    print(output)
        for vcs_dir in (".bzr", "CVS", ".git", ".svn", ".hg", "_darcs"):
            if vcs_dir in dirs:
                dirs.remove(vcs_dir)

def main():
    script_name = os.path.basename(sys.argv[0])
    epilog = "See %s(1) for more info." % (script_name)
    parser = argparse.ArgumentParser(epilog=epilog)

parser.add_argument("-v", "--verbose", help="print more information",
                        dest="verbose", action="store_true", default=False)
    parser.add_argument("-d", "--directory",
                        help="check the files in the specified directory",
                        dest="directory", default=".")
    parser.add_argument("-m", "--mimetype", metavar="MIMETYPE",
                        help="Add MIMETYPE to list of whitelisted mimetypes.",
                        dest="whitelisted_mimetypes", action="append",
                        default=DEFAULT_WHITELISTED_MIMETYPES)
    parser.add_argument("-e", "--extension", metavar="EXTENSION",
                        help="Add EXTENSION to list of whitelisted extensions.",
                        dest="whitelisted_extensions", action="append",
                        default=DEFAULT_WHITELISTED_EXTENSIONS)

args = parser.parse_args()

whitelisted_extensions = [x.lower() for x in args.whitelisted_extensions]
    suspicious_source(args.whitelisted_mimetypes, whitelisted_extensions,
                      args.directory, args.verbose)

if __name__ == "__main__":
    main()