Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/pathfix.py @ 58689:514b56efd89a 3.1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merged revisions 77962 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ................ r77962 | r.david.murray | 2010-02-04 11:41:57 -0500 (Thu, 04 Feb 2010) | 17 lines Merged revisions 77943,77959-77960 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77943 | r.david.murray | 2010-02-03 08:36:23 -0500 (Wed, 03 Feb 2010) | 2 lines Explicitly mention the default value for formatdate's usegmt parameter. ........ r77959 | nick.coghlan | 2010-02-04 07:43:58 -0500 (Thu, 04 Feb 2010) | 1 line Issue 6760: Clarify args handling for subprocess.Popen. Patch by Chris Rebert ........ r77960 | r.david.murray | 2010-02-04 11:33:31 -0500 (Thu, 04 Feb 2010) | 2 lines Add Chris Rebert to ACKS for issue 6760 Popen doc improvements. ........ ................
author R. David Murray <rdmurray@bitdance.com>
date Thu, 04 Feb 2010 16:44:31 +0000
parents 2644f54e3676
children e3e6aa633f33
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python3
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2
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3 # Change the #! line occurring in Python scripts. The new interpreter
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4 # pathname must be given with a -i option.
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5 #
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6 # Command line arguments are files or directories to be processed.
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7 # Directories are searched recursively for files whose name looks
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8 # like a python module.
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9 # Symbolic links are always ignored (except as explicit directory
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10 # arguments). Of course, the original file is kept as a back-up
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11 # (with a "~" attached to its name).
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12 #
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13 # Undoubtedly you can do this using find and sed or perl, but this is
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14 # a nice example of Python code that recurses down a directory tree
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15 # and uses regular expressions. Also note several subtleties like
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16 # preserving the file's mode and avoiding to even write a temp file
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17 # when no changes are needed for a file.
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18 #
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19 # NB: by changing only the function fixfile() you can turn this
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20 # into a program for a different change to Python programs...
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21
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22 import sys
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23 import re
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24 import os
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25 from stat import *
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26 import getopt
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27
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28 err = sys.stderr.write
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29 dbg = err
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30 rep = sys.stdout.write
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31
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32 new_interpreter = None
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33
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34 def main():
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35 global new_interpreter
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36 usage = ('usage: %s -i /interpreter file-or-directory ...\n' %
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37 sys.argv[0])
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38 try:
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39 opts, args = getopt.getopt(sys.argv[1:], 'i:')
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40 except getopt.error as msg:
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41 err(msg + '\n')
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42 err(usage)
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43 sys.exit(2)
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44 for o, a in opts:
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45 if o == '-i':
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46 new_interpreter = a.encode()
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47 if not new_interpreter or not new_interpreter.startswith(b'/') or \
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48 not args:
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49 err('-i option or file-or-directory missing\n')
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50 err(usage)
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51 sys.exit(2)
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52 bad = 0
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53 for arg in args:
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54 if os.path.isdir(arg):
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55 if recursedown(arg): bad = 1
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56 elif os.path.islink(arg):
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57 err(arg + ': will not process symbolic links\n')
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58 bad = 1
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59 else:
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60 if fix(arg): bad = 1
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61 sys.exit(bad)
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62
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63 ispythonprog = re.compile('^[a-zA-Z0-9_]+\.py$')
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64 def ispython(name):
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65 return bool(ispythonprog.match(name))
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66
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67 def recursedown(dirname):
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68 dbg('recursedown(%r)\n' % (dirname,))
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69 bad = 0
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70 try:
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71 names = os.listdir(dirname)
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72 except os.error as msg:
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73 err('%s: cannot list directory: %r\n' % (dirname, msg))
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74 return 1
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75 names.sort()
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76 subdirs = []
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77 for name in names:
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78 if name in (os.curdir, os.pardir): continue
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79 fullname = os.path.join(dirname, name)
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80 if os.path.islink(fullname): pass
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81 elif os.path.isdir(fullname):
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82 subdirs.append(fullname)
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83 elif ispython(name):
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84 if fix(fullname): bad = 1
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85 for fullname in subdirs:
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86 if recursedown(fullname): bad = 1
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87 return bad
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88
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89 def fix(filename):
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90 ## dbg('fix(%r)\n' % (filename,))
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91 try:
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92 f = open(filename, 'rb')
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93 except IOError as msg:
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94 err('%s: cannot open: %r\n' % (filename, msg))
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95 return 1
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96 line = f.readline()
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97 fixed = fixline(line)
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98 if line == fixed:
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99 rep(filename+': no change\n')
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100 f.close()
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101 return
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102 head, tail = os.path.split(filename)
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103 tempname = os.path.join(head, '@' + tail)
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104 try:
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105 g = open(tempname, 'wb')
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106 except IOError as msg:
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107 f.close()
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108 err('%s: cannot create: %r\n' % (tempname, msg))
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109 return 1
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110 rep(filename + ': updating\n')
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111 g.write(fixed)
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112 BUFSIZE = 8*1024
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113 while 1:
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114 buf = f.read(BUFSIZE)
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115 if not buf: break
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116 g.write(buf)
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117 g.close()
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118 f.close()
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119
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120 # Finishing touch -- move files
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121
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122 # First copy the file's mode to the temp file
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123 try:
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124 statbuf = os.stat(filename)
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125 os.chmod(tempname, statbuf[ST_MODE] & 0o7777)
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126 except os.error as msg:
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127 err('%s: warning: chmod failed (%r)\n' % (tempname, msg))
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128 # Then make a backup of the original file as filename~
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129 try:
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130 os.rename(filename, filename + '~')
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131 except os.error as msg:
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132 err('%s: warning: backup failed (%r)\n' % (filename, msg))
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133 # Now move the temp file to the original file
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134 try:
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135 os.rename(tempname, filename)
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136 except os.error as msg:
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137 err('%s: rename failed (%r)\n' % (filename, msg))
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138 return 1
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139 # Return succes
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140 return 0
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141
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142 def fixline(line):
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143 if not line.startswith(b'#!'):
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144 return line
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145 if b"python" not in line:
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146 return line
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147 return b'#! ' + new_interpreter + b'\n'
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148
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Andrew M. Kuchling <amk@amk.ca>
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149 if __name__ == '__main__':
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150 main()