Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/methfix.py @ 20737:00a581bdedeb legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
When overriding __str__ or __repr__, set the tp_print slot to NULL.
author Guido van Rossum <guido@python.org>
date Mon, 29 Oct 2001 14:33:44 +0000
parents 1881b968989b
children 8a7a2f1f88f0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4573
73758db2f464 /usr/local/bin/python -> /usr/bin/env python
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1 #! /usr/bin/env python
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2
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3 # Fix Python source files to avoid using
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4 # def method(self, (arg1, ..., argn)):
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5 # instead of the more rational
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6 # def method(self, arg1, ..., argn):
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7 #
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8 # Command line arguments are files or directories to be processed.
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9 # Directories are searched recursively for files whose name looks
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10 # like a python module.
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11 # Symbolic links are always ignored (except as explicit directory
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12 # arguments). Of course, the original file is kept as a back-up
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13 # (with a "~" attached to its name).
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14 # It complains about binaries (files containing null bytes)
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15 # and about files that are ostensibly not Python files: if the first
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16 # line starts with '#!' and does not contain the string 'python'.
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17 #
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18 # Changes made are reported to stdout in a diff-like format.
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19 #
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20 # Undoubtedly you can do this using find and sed or perl, but this is
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21 # a nice example of Python code that recurses down a directory tree
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22 # and uses regular expressions. Also note several subtleties like
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23 # preserving the file's mode and avoiding to even write a temp file
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24 # when no changes are needed for a file.
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25 #
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26 # NB: by changing only the function fixline() you can turn this
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27 # into a program for a different change to Python programs...
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28
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29 import sys
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30 import regex
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31 import os
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32 from stat import *
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33 import string
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34
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35 err = sys.stderr.write
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36 dbg = err
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37 rep = sys.stdout.write
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38
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39 def main():
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40 bad = 0
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41 if not sys.argv[1:]: # No arguments
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42 err('usage: ' + sys.argv[0] + ' file-or-directory ...\n')
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43 sys.exit(2)
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44 for arg in sys.argv[1:]:
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45 if os.path.isdir(arg):
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46 if recursedown(arg): bad = 1
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47 elif os.path.islink(arg):
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48 err(arg + ': will not process symbolic links\n')
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49 bad = 1
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50 else:
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51 if fix(arg): bad = 1
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52 sys.exit(bad)
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53
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54 ispythonprog = regex.compile('^[a-zA-Z0-9_]+\.py$')
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55 def ispython(name):
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56 return ispythonprog.match(name) >= 0
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57
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58 def recursedown(dirname):
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59 dbg('recursedown(' + `dirname` + ')\n')
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60 bad = 0
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61 try:
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62 names = os.listdir(dirname)
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63 except os.error, msg:
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64 err(dirname + ': cannot list directory: ' + `msg` + '\n')
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65 return 1
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66 names.sort()
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67 subdirs = []
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68 for name in names:
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69 if name in (os.curdir, os.pardir): continue
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70 fullname = os.path.join(dirname, name)
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71 if os.path.islink(fullname): pass
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72 elif os.path.isdir(fullname):
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73 subdirs.append(fullname)
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74 elif ispython(name):
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75 if fix(fullname): bad = 1
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76 for fullname in subdirs:
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77 if recursedown(fullname): bad = 1
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78 return bad
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79
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80 def fix(filename):
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81 ## dbg('fix(' + `filename` + ')\n')
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82 try:
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83 f = open(filename, 'r')
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84 except IOError, msg:
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85 err(filename + ': cannot open: ' + `msg` + '\n')
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86 return 1
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87 head, tail = os.path.split(filename)
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88 tempname = os.path.join(head, '@' + tail)
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89 g = None
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90 # If we find a match, we rewind the file and start over but
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91 # now copy everything to a temp file.
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92 lineno = 0
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93 while 1:
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94 line = f.readline()
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95 if not line: break
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96 lineno = lineno + 1
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97 if g is None and '\0' in line:
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98 # Check for binary files
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99 err(filename + ': contains null bytes; not fixed\n')
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100 f.close()
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101 return 1
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102 if lineno == 1 and g is None and line[:2] == '#!':
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103 # Check for non-Python scripts
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104 words = string.split(line[2:])
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105 if words and regex.search('[pP]ython', words[0]) < 0:
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106 msg = filename + ': ' + words[0]
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107 msg = msg + ' script; not fixed\n'
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108 err(msg)
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109 f.close()
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110 return 1
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111 while line[-2:] == '\\\n':
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112 nextline = f.readline()
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113 if not nextline: break
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114 line = line + nextline
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115 lineno = lineno + 1
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116 newline = fixline(line)
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117 if newline != line:
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118 if g is None:
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119 try:
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120 g = open(tempname, 'w')
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121 except IOError, msg:
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122 f.close()
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123 err(tempname+': cannot create: '+\
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124 `msg`+'\n')
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125 return 1
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126 f.seek(0)
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127 lineno = 0
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128 rep(filename + ':\n')
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129 continue # restart from the beginning
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130 rep(`lineno` + '\n')
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131 rep('< ' + line)
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132 rep('> ' + newline)
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133 if g is not None:
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134 g.write(newline)
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135
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136 # End of file
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137 f.close()
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138 if not g: return 0 # No changes
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139
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140 # Finishing touch -- move files
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141
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142 # First copy the file's mode to the temp file
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143 try:
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144 statbuf = os.stat(filename)
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145 os.chmod(tempname, statbuf[ST_MODE] & 07777)
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146 except os.error, msg:
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147 err(tempname + ': warning: chmod failed (' + `msg` + ')\n')
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148 # Then make a backup of the original file as filename~
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149 try:
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150 os.rename(filename, filename + '~')
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151 except os.error, msg:
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152 err(filename + ': warning: backup failed (' + `msg` + ')\n')
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153 # Now move the temp file to the original file
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154 try:
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155 os.rename(tempname, filename)
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156 except os.error, msg:
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157 err(filename + ': rename failed (' + `msg` + ')\n')
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158 return 1
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159 # Return succes
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160 return 0
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161
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162
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163 fixpat = '^[ \t]+def +[a-zA-Z0-9_]+ *( *self *, *\(( *\(.*\) *)\) *) *:'
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164 fixprog = regex.compile(fixpat)
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166 def fixline(line):
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167 if fixprog.match(line) >= 0:
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168 (a, b), (c, d) = fixprog.regs[1:3]
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169 line = line[:a] + line[c:d] + line[b:]
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170 return line
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173 main()