Mercurial > hgrepos > Python > apps > py-cutils

annotate cutils/dos2unix.py @ 373:9cba56c87946

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 13 Apr 2025 14:24:53 +0200
parents 48430941c18c
children
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1 # -*- coding: utf-8 -*-
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2 # :-
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3 # SPDX-FileCopyrightText: © 2020-2025 Franz Glasner
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4 # SPDX-License-Identifier: BSD-3-Clause
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5 # :-
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6 r"""Pure Python implementation of `dos2unix`.
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7
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8 """
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9
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10 from __future__ import print_function, absolute_import
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11
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12 from . import (__version__, __revision__)
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13
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14
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15 __all__ = []
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16
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17
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18 import argparse
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19 import io
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20 import sys
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21
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22
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23 def main(argv=None):
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24 aparser = argparse.ArgumentParser(
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25 description="Python implementation of dos2unix",
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26 fromfile_prefix_chars='@')
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27 aparser.add_argument(
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28 "--version", "-V", action="version",
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29 version="%s (rv:%s)" % (__version__, __revision__))
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30 aparser.add_argument(
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31 "--keepdate", "-k", action="store_true",
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32 help="Keep the date stamp of output file same as input file.")
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33 aparser.add_argument(
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34 "--oldfile", "-o", action="store_false", dest="newfile", default=False,
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35 help="Old file mode. Convert the file and write output to it."
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36 " The program defaults to run in this mode."
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37 " Wildcard names may be used. ")
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38 aparser.add_argument(
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39 "--newfile", "-n", action="store_true", dest="newfile", default=False,
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40 help="New file mode. Convert the infile and write output to outfile."
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41 " File names must be given in pairs and wildcard names should"
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42 " NOT be used or you WILL lose your files.")
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43 aparser.add_argument(
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44 "--quiet", "-q", action="store_true",
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45 help="Quiet mode. Suppress all warning and messages.")
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46
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47 aparser.add_argument(
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48 "files", nargs="+", metavar="FILE")
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49
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50 opts = aparser.parse_args(args=argv)
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51
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52 if opts.keepdate:
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53 raise NotImplementedError("--keepdate, -k")
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54
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55 return dos2unix(opts)
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58 def gen_opts(files=[], newfile=False, keepdate=False, quiet=True):
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59 if keepdate:
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60 raise NotImplementedError("--keepdate, -k")
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62 if newfile and (len(files) % 2):
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63 raise ValueError("need pairs of files")
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64
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65 opts = argparse.Namespace(files=files,
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66 newfile=newfile,
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67 keepdate=keepdate,
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68 quiet=quiet)
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69 return opts
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72 def dos2unix(opts):
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73 if opts.newfile:
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74 return _convert_copy(opts)
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75 else:
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76 return _convert_inplace(opts)
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78
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79 def _convert_inplace(opts):
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80 lines = []
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81 for filename in opts.files:
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82 with io.open(filename, "rt", encoding="iso-8859-1") as source:
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83 for line in source:
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84 lines.append(line.encode("iso-8859-1"))
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85 with open(filename, "wb") as dest:
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86 for line in lines:
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87 dest.write(line)
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88
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89
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90 def _convert_copy(opts):
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91 if len(opts.files) % 2:
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92 print("ERROR: need pairs of files", file=sys.stderr)
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93 return 64 # :manpage:`sysexits(3)` EX_USAGE
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94 idx = 0
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95 while idx < len(opts.files):
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96 with io.open(opts.files[idx], "rt", encoding="iso-8859-1") as source:
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97 with open(opts.files[idx+1], "wb") as dest:
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98 for line in source:
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99 dest.write(line.encode("iso-8859-1"))
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100 idx += 2
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101
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102
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103 if __name__ == "__main__":
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104 sys.exit(main())