annotate unixSoft/bin/sednames.py @ 493:1bb1c44ce49c

systemd: unit file for auto-starting emacs daemon
author Augie Fackler <raf@durin42.com>
date Wed, 15 Jul 2020 20:30:26 -0400
parents 91dbdbea15e5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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1 #!/usr/bin/env python
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2
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3 from itertools import imap as map
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4 from itertools import izip as zip
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5
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6 import re
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7 whitespace_chars = {
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8 '\a': r'\a',
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9 '\b': r'\b',
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10 '\t': r'\t',
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11 '\n': r'\n',
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12 '\v': r'\v',
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13 '\f': r'\f',
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14 '\r': r'\r',
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15 }
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16 whitespace_chars_exp = re.compile('[' + ''.join(whitespace_chars) + ']')
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17 chars_to_escape = dict(zip(map(chr, xrange(0x00, 0x20)), ('\\' + ch for ch in map(chr, xrange(0x00, 0x20)))))
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18 for ch in '{}' "'" '"' '$*?':
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19 chars_to_escape[ch] = '\\' + ch
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20 for ch in whitespace_chars:
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21 del chars_to_escape[ch] # Let whitespace_chars handle these.
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22 chars_to_escape_exp = re.compile('[][\\' + ''.join(chars_to_escape) + ']')
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23 chars_to_escape['['] = '\['
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24 chars_to_escape[']'] = '\]'
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25 chars_to_escape['\\'] = '\\\\'
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26 minimal_chars_to_escape_exp = re.compile("[\\']")
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27
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28 def quote_argument(arg):
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29 count = 0
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30 match = chars_to_escape_exp.search(arg)
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31 while match:
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32 count += 1
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33 match = chars_to_escape_exp.search(arg, match.end())
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34 else:
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35 del match
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36
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37 if count > 2:
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38 arg = "'" + re.sub(minimal_chars_to_escape_exp, lambda match: '\\' + match.group(0), arg) + "'"
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39 else:
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40 arg = re.sub(chars_to_escape_exp, lambda match: chars_to_escape[match.group(0)], arg)
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41
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42 arg = re.sub(whitespace_chars_exp, lambda match: whitespace_chars[match.group(0)], arg)
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43 return arg
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44
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45 def custom_rename(option, opt_str, value, parser):
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46 for i, arg in enumerate(parser.rargs):
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47 if arg == ';':
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48 break
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49 parser.values.ensure_value('custom_rename', parser.rargs[:i])
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50 del parser.rargs[:i + 1]
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51
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52 import optparse
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53 parser = optparse.OptionParser(description="This program batch-renames files, optionally using a VCS (such as svn, hg, or bzr) or other external program to do the renaming. You specify the rename operations using sed commands, which you specify using the -e option.")
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54 parser.add_option('-e', '--program', action='append', default=[''])
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55 parser.add_option('--vcs', metavar='VCS', help='Version-control system with which to rename files, using <VCS> mv <SRC> <DST>; overridden by --custom-rename')
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56 parser.add_option('--custom-rename', help='Custom command to rename the file (e.g., hg mv); works like find(1) -exec (but with two {}, which are src and dst in that order), or you can use {SRC} and {DST}, or you can omit {...} entirely in which case src and dst will be appended in that order', action='callback', type=None, callback=custom_rename, default=None)
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57 parser.add_option('-q', '--quiet', action='store_true', default=False)
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58 opts, args = parser.parse_args()
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59
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60 try:
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61 custom_rename = opts.custom_rename
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62 except AttributeError:
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63 try:
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64 custom_rename = [opts.vcs, 'mv']
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65 except AttributeError:
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66 custom_rename = None
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67
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68 def prefix_with_dash_e(seq):
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69 for arg in seq:
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70 yield '-e'
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71 yield arg
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72
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73 import subprocess
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74 sed = subprocess.Popen(['sed', '-El'] + list(prefix_with_dash_e(opts.program)), stdin=subprocess.PIPE, stdout=subprocess.PIPE)
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75
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76 import os, sys
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77 for src in args:
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78 sed.stdin.write(src + '\n')
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79 sed.stdin.flush()
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80 dst = sed.stdout.readline().rstrip('\n')
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81 if src == dst:
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82 if not opts.quiet:
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83 print >>sys.stderr, 'sed program did not transform %r - skipping' % (src,)
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84 else:
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85 if custom_rename:
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86 src_and_dst = [src, dst]
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87 rename_cmd = list(custom_rename)
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88 for i, arg in enumerate(rename_cmd):
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89 if arg == '{SRC}':
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90 rename_cmd[i] = src
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91 elif arg == '{DST}':
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92 rename_cmd[i] = dst
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93 elif arg == '{}':
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94 try:
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95 rename_cmd[i] = src_and_dst.pop(0)
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96 except IndexError:
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97 sys.exit('Too many {} arguments in custom rename command %r' % (custom_rename,))
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98 else:
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99 rename_cmd += src_and_dst
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100
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101 if not opts.quiet:
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102 print >>sys.stderr, ' '.join(map(quote_argument, rename_cmd))
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103 subprocess.check_call(rename_cmd)
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104 else:
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105 if not opts.quiet:
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106 print >>sys.stderr, 'Renaming %r to %r' % (src, dst)
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107 os.rename(src, dst)
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108
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109 sed.stdin.close()
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110 sys.exit(sed.wait())