Mercurial > hgrepos > Python > apps > py-cutils

annotate cutils/dos2unix.py @ 72:ae2df602beb4

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Make shasum.py and dos2unix sub-modules to the new "cutils" package
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 26 Feb 2022 19:20:20 +0100
parents dos2unix.py@26a8d4e7c8ee
children c3268f4e752f
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1 r"""
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2 :Author: Franz Glasner
43
d856432a1cbb Extend copyright year to 2022
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3 :Copyright: (c) 2020-2022 Franz Glasner.
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4 All rights reserved.
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5 :License: BSD 3-Clause "New" or "Revised" License.
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6 See :ref:`LICENSE <license>` for details.
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7 If you cannot find LICENSE see
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8 <https://opensource.org/licenses/BSD-3-Clause>
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9 :ID: @(#) $HGid$
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10
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11 """
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12
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13 from __future__ import print_function, absolute_import
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14
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15 from . import (__version__, __revision__, __date__)
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16
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17 import argparse
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18 import io
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19 import sys
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20
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21
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22 def main(argv=None):
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23 aparser = argparse.ArgumentParser(
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24 description="Python implementation of dos2unix",
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25 fromfile_prefix_chars='@')
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26 aparser.add_argument(
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27 "--version", "-V", action="version",
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28 version="%s (rv:%s)" % (__version__, __revision__))
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29 aparser.add_argument(
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30 "--keepdate", "-k", action="store_true",
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31 help="Keep the date stamp of output file same as input file.")
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32 aparser.add_argument(
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33 "--oldfile", "-o", action="store_false", dest="newfile", default=False,
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34 help="Old file mode. Convert the file and write output to it."
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35 " The program defaults to run in this mode."
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36 " Wildcard names may be used. ")
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37 aparser.add_argument(
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38 "--newfile", "-n", action="store_true", dest="newfile", default=False,
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39 help="New file mode. Convert the infile and write output to outfile."
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40 " File names must be given in pairs and wildcard names should"
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41 " NOT be used or you WILL lose your files.")
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42 aparser.add_argument(
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43 "--quiet", "-q", action="store_true",
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44 help="Quiet mode. Suppress all warning and messages.")
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45
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46 aparser.add_argument(
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47 "files", nargs="+", metavar="FILE")
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48
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49 opts = aparser.parse_args(args=argv)
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50
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51 if opts.keepdate:
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52 raise NotImplementedError("--keepdate, -k")
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53
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54 return dos2unix(opts)
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57 def gen_opts(files=[], newfile=False, keepdate=False, quiet=True):
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58 if keepdate:
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59 raise NotImplementedError("--keepdate, -k")
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61 if newfile and (len(files) % 2):
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62 raise ValueError("need pairs of files")
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64 opts = argparse.Namespace(files=files,
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65 newfile=newfile,
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66 keepdate=keepdate,
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67 quiet=quiet)
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68 return opts
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71 def dos2unix(opts):
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72 if opts.newfile:
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73 return _convert_copy(opts)
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74 else:
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75 return _convert_inplace(opts)
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77
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78 def _convert_inplace(opts):
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79 lines = []
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80 for filename in opts.files:
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81 with io.open(filename, "rt", encoding="iso-8859-1") as source:
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82 for line in source:
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83 lines.append(line.encode("iso-8859-1"))
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84 with open(filename, "wb") as dest:
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85 for line in lines:
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86 dest.write(line)
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87
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88
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89 def _convert_copy(opts):
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90 if len(opts.files) % 2:
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91 print("ERROR: need pairs of files", file=sys.stderr)
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92 return 64 # :manpage:`sysexits(3)` EX_USAGE
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93 idx = 0
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94 while idx < len(opts.files):
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95 with io.open(opts.files[idx], "rt", encoding="iso-8859-1") as source:
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96 with open(opts.files[idx+1], "wb") as dest:
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97 for line in source:
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98 dest.write(line.encode("iso-8859-1"))
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99 idx += 2
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100
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101
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102 if __name__ == "__main__":
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103 sys.exit(main())