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annotate Mac/Tools/fixapplepython23.py @ 74135:9c19df6c8ea0 3.2

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News entry for Issue12798
author Senthil Kumaran <senthil@uthcode.com>
date Fri, 23 Dec 2011 11:11:21 +0800
parents 7431638e7dd8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/python
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2 """fixapplepython23 - Fix Apple-installed Python 2.3 (on Mac OS X 10.3)
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3
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4 Python 2.3 (and 2.3.X for X<5) have the problem that building an extension
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5 for a framework installation may accidentally pick up the framework
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6 of a newer Python, in stead of the one that was used to build the extension.
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7
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8 This script modifies the Makefile (in .../lib/python2.3/config) to use
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9 the newer method of linking extensions with "-undefined dynamic_lookup"
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10 which fixes this problem.
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11
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12 The script will first check all prerequisites, and return a zero exit
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13 status also when nothing needs to be fixed.
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14 """
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15 import sys
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16 import os
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17 import platform
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18
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19 MAKEFILE='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/Makefile'
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20 CHANGES=((
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21 'LDSHARED=\t$(CC) $(LDFLAGS) -bundle -framework $(PYTHONFRAMEWORK)\n',
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22 'LDSHARED=\t$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup\n'
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23 ),(
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24 'BLDSHARED=\t$(CC) $(LDFLAGS) -bundle -framework $(PYTHONFRAMEWORK)\n',
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25 'BLDSHARED=\t$(CC) $(LDFLAGS) -bundle -undefined dynamic_lookup\n'
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26 ),(
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27 'CC=\t\tgcc\n',
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28 'CC=\t\t/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-gcc\n'
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29 ),(
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30 'CXX=\t\tc++\n',
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31 'CXX=\t\t/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-g++\n'
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32 ))
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33
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34 GCC_SCRIPT='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-gcc'
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35 GXX_SCRIPT='/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/config/PantherPythonFix/run-g++'
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36 SCRIPT="""#!/bin/sh
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37 export MACOSX_DEPLOYMENT_TARGET=10.3
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38 exec %s "${@}"
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39 """
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40
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41 def findline(lines, start):
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42 """return line starting with given string or -1"""
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43 for i in range(len(lines)):
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44 if lines[i][:len(start)] == start:
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45 return i
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46 return -1
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47
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48 def fix(makefile, do_apply):
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49 """Fix the Makefile, if required."""
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50 fixed = False
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51 lines = open(makefile).readlines()
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52
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53 for old, new in CHANGES:
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54 i = findline(lines, new)
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55 if i >= 0:
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56 # Already fixed
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57 continue
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58 i = findline(lines, old)
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59 if i < 0:
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60 print('fixapplepython23: Python installation not fixed (appears broken)')
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61 print('fixapplepython23: missing line:', old)
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62 return 2
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63 lines[i] = new
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64 fixed = True
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65
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66 if fixed:
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67 if do_apply:
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68 print('fixapplepython23: Fix to Apple-installed Python 2.3 applied')
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69 os.rename(makefile, makefile + '~')
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70 open(makefile, 'w').writelines(lines)
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71 return 0
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72 else:
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73 print('fixapplepython23: Fix to Apple-installed Python 2.3 should be applied')
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74 return 1
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75 else:
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76 print('fixapplepython23: No fix needed, appears to have been applied before')
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77 return 0
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78
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79 def makescript(filename, compiler):
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80 """Create a wrapper script for a compiler"""
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81 dirname = os.path.split(filename)[0]
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82 if not os.access(dirname, os.X_OK):
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83 os.mkdir(dirname, 0o755)
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84 fp = open(filename, 'w')
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85 fp.write(SCRIPT % compiler)
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86 fp.close()
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87 os.chmod(filename, 0o755)
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88 print('fixapplepython23: Created', filename)
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89
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90 def main():
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91 # Check for -n option
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92 if len(sys.argv) > 1 and sys.argv[1] == '-n':
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93 do_apply = False
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94 else:
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95 do_apply = True
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96 # First check OS version
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97 if sys.byteorder == 'little':
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98 # All intel macs are fine
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99 print("fixapplypython23: no fix is needed on MacOSX on Intel")
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100 sys.exit(0)
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101
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102 osver = platform.mac_ver()
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103 if osver != '10.3' and os.ver < '10.3.':
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104 print('fixapplepython23: no fix needed on MacOSX < 10.3')
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105 sys.exit(0)
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106
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107 if osver >= '10.4':
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108 print('fixapplepython23: no fix needed on MacOSX >= 10.4')
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109 sys.exit(0)
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110
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111 # Test that a framework Python is indeed installed
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112 if not os.path.exists(MAKEFILE):
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113 print('fixapplepython23: Python framework does not appear to be installed (?), nothing fixed')
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114 sys.exit(0)
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115 # Check that we can actually write the file
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116 if do_apply and not os.access(MAKEFILE, os.W_OK):
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117 print('fixapplepython23: No write permission, please run with "sudo"')
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118 sys.exit(2)
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119 # Create the shell scripts
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120 if do_apply:
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121 if not os.access(GCC_SCRIPT, os.X_OK):
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122 makescript(GCC_SCRIPT, "gcc")
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123 if not os.access(GXX_SCRIPT, os.X_OK):
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124 makescript(GXX_SCRIPT, "g++")
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125 # Finally fix the makefile
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126 rv = fix(MAKEFILE, do_apply)
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127 #sys.exit(rv)
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128 sys.exit(0)
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129
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130 if __name__ == '__main__':
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131 main()