Mercurial > cpython-lru_cache-weakref
annotate Tools/scripts/pathfix.py @ 66978:aed2bbafa550 3.1
Blocked revisions 87324 via svnmerge
........
r87324 | r.david.murray | 2010-12-16 14:08:51 -0500 (Thu, 16 Dec 2010) | 9 lines
#10719: restore messages generated on invalid compileall args
Before the introduction of filename arguments to compileall it gave semi useful
messages about not being able to 'list' names that weren't valid directories.
This fix restores that behavior. In addition to the test for this case, the
patch also adds a test for the default behavior of compileall when no arguments
are provided, and fixes a bug in one of the previously added tests.
........
| author | R. David Murray <rdmurray@bitdance.com> |
|---|---|
| date | Thu, 16 Dec 2010 19:10:16 +0000 |
| parents | 2644f54e3676 |
| children | e3e6aa633f33 |
| 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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149 if __name__ == '__main__': |
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150 main() |
