Mercurial > hgrepos > Python > apps > py-cutils

annotate dos2unix.py @ 65:a0cc15de8ae9

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 13 Feb 2022 16:10:13 +0100
parents 26a8d4e7c8ee
children
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36
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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.
36
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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
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14
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15
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16 try:
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17 from _cutils import __version__
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18 except ImportError:
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19 __version__ = "unknown"
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20
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21 __revision__ = "|VCSRevision|"
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22 __date__ = "|VCSJustDate|"
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23
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24
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25 import argparse
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26 import io
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27 import sys
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28
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29
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30 def main(argv=None):
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31 aparser = argparse.ArgumentParser(
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32 description="Python implementation of dos2unix",
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33 fromfile_prefix_chars='@')
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34 aparser.add_argument(
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35 "--version", "-V", action="version",
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36 version="%s (rv:%s)" % (__version__, __revision__))
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37 aparser.add_argument(
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38 "--keepdate", "-k", action="store_true",
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39 help="Keep the date stamp of output file same as input file.")
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40 aparser.add_argument(
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41 "--oldfile", "-o", action="store_false", dest="newfile", default=False,
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42 help="Old file mode. Convert the file and write output to it."
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43 " The program defaults to run in this mode."
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44 " Wildcard names may be used. ")
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45 aparser.add_argument(
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46 "--newfile", "-n", action="store_true", dest="newfile", default=False,
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47 help="New file mode. Convert the infile and write output to outfile."
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48 " File names must be given in pairs and wildcard names should"
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49 " NOT be used or you WILL lose your files.")
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50 aparser.add_argument(
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51 "--quiet", "-q", action="store_true",
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52 help="Quiet mode. Suppress all warning and messages.")
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53
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54 aparser.add_argument(
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55 "files", nargs="+", metavar="FILE")
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56
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57 opts = aparser.parse_args(args=argv)
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58
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59 if opts.keepdate:
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60 raise NotImplementedError("--keepdate, -k")
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61
44
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62 return dos2unix(opts)
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63
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64
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65 def gen_opts(files=[], newfile=False, keepdate=False, quiet=True):
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66 if keepdate:
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67 raise NotImplementedError("--keepdate, -k")
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68
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69 if newfile and (len(files) % 2):
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70 raise ValueError("need pairs of files")
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71
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72 opts = argparse.Namespace(files=files,
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73 newfile=newfile,
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74 keepdate=keepdate,
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75 quiet=quiet)
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76 return opts
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77
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78
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79 def dos2unix(opts):
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80 if opts.newfile:
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81 return _convert_copy(opts)
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82 else:
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83 return _convert_inplace(opts)
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84
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85
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86 def _convert_inplace(opts):
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87 lines = []
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88 for filename in opts.files:
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89 with io.open(filename, "rt", encoding="iso-8859-1") as source:
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90 for line in source:
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91 lines.append(line.encode("iso-8859-1"))
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92 with open(filename, "wb") as dest:
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93 for line in lines:
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94 dest.write(line)
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95
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96
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97 def _convert_copy(opts):
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98 if len(opts.files) % 2:
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99 print("ERROR: need pairs of files", file=sys.stderr)
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100 return 64 # :manpage:`sysexits(3)` EX_USAGE
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101 idx = 0
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102 while idx < len(opts.files):
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103 with io.open(opts.files[idx], "rt", encoding="iso-8859-1") as source:
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104 with open(opts.files[idx+1], "wb") as dest:
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105 for line in source:
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106 dest.write(line.encode("iso-8859-1"))
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107 idx += 2
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108
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109
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110 if __name__ == "__main__":
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111 sys.exit(main())