annotate env/lib/python3.7/site-packages/libpasteurize/main.py @ 0:26e78fe6e8c4 draft

"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 """
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2 pasteurize: automatic conversion of Python 3 code to clean 2/3 code
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3 ===================================================================
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4
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5 ``pasteurize`` attempts to convert existing Python 3 code into source-compatible
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6 Python 2 and 3 code.
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7
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8 Use it like this on Python 3 code:
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9
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10 $ pasteurize --verbose mypython3script.py
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11
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12 This removes any Py3-only syntax (e.g. new metaclasses) and adds these
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13 import lines:
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14
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15 from __future__ import absolute_import
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16 from __future__ import division
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17 from __future__ import print_function
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18 from __future__ import unicode_literals
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19 from future import standard_library
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20 standard_library.install_hooks()
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21 from builtins import *
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22
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23 To write changes to the files, use the -w flag.
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24
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25 It also adds any other wrappers needed for Py2/3 compatibility.
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26
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27 Note that separate stages are not available (or needed) when converting from
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28 Python 3 with ``pasteurize`` as they are when converting from Python 2 with
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29 ``futurize``.
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30
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31 The --all-imports option forces adding all ``__future__`` imports,
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32 ``builtins`` imports, and standard library aliases, even if they don't
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33 seem necessary for the current state of each module. (This can simplify
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34 testing, and can reduce the need to think about Py2 compatibility when editing
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35 the code further.)
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36
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37 """
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38
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39 from __future__ import (absolute_import, print_function, unicode_literals)
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40
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41 import sys
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42 import logging
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43 import optparse
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44 from lib2to3.main import main, warn, StdoutRefactoringTool
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45 from lib2to3 import refactor
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46
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47 from future import __version__
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48 from libpasteurize.fixes import fix_names
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49
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50
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51 def main(args=None):
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52 """Main program.
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53
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54 Returns a suggested exit status (0, 1, 2).
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55 """
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56 # Set up option parser
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57 parser = optparse.OptionParser(usage="pasteurize [options] file|dir ...")
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58 parser.add_option("-V", "--version", action="store_true",
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59 help="Report the version number of pasteurize")
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60 parser.add_option("-a", "--all-imports", action="store_true",
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61 help="Adds all __future__ and future imports to each module")
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62 parser.add_option("-f", "--fix", action="append", default=[],
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63 help="Each FIX specifies a transformation; default: all")
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64 parser.add_option("-j", "--processes", action="store", default=1,
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65 type="int", help="Run 2to3 concurrently")
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66 parser.add_option("-x", "--nofix", action="append", default=[],
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67 help="Prevent a fixer from being run.")
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68 parser.add_option("-l", "--list-fixes", action="store_true",
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69 help="List available transformations")
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70 # parser.add_option("-p", "--print-function", action="store_true",
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71 # help="Modify the grammar so that print() is a function")
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72 parser.add_option("-v", "--verbose", action="store_true",
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73 help="More verbose logging")
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74 parser.add_option("--no-diffs", action="store_true",
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75 help="Don't show diffs of the refactoring")
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76 parser.add_option("-w", "--write", action="store_true",
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77 help="Write back modified files")
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78 parser.add_option("-n", "--nobackups", action="store_true", default=False,
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79 help="Don't write backups for modified files.")
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80
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81 # Parse command line arguments
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82 refactor_stdin = False
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83 flags = {}
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84 options, args = parser.parse_args(args)
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85 fixer_pkg = 'libpasteurize.fixes'
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86 avail_fixes = fix_names
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87 flags["print_function"] = True
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88
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89 if not options.write and options.no_diffs:
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90 warn("not writing files and not printing diffs; that's not very useful")
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91 if not options.write and options.nobackups:
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92 parser.error("Can't use -n without -w")
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93 if options.version:
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94 print(__version__)
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95 return 0
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96 if options.list_fixes:
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97 print("Available transformations for the -f/--fix option:")
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98 for fixname in sorted(avail_fixes):
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99 print(fixname)
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100 if not args:
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101 return 0
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102 if not args:
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103 print("At least one file or directory argument required.",
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104 file=sys.stderr)
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105 print("Use --help to show usage.", file=sys.stderr)
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106 return 2
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107 if "-" in args:
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108 refactor_stdin = True
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109 if options.write:
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110 print("Can't write to stdin.", file=sys.stderr)
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111 return 2
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112
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113 # Set up logging handler
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114 level = logging.DEBUG if options.verbose else logging.INFO
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115 logging.basicConfig(format='%(name)s: %(message)s', level=level)
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116
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117 unwanted_fixes = set()
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118 for fix in options.nofix:
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119 if ".fix_" in fix:
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120 unwanted_fixes.add(fix)
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121 else:
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122 # Infer the full module name for the fixer.
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123 # First ensure that no names clash (e.g.
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124 # lib2to3.fixes.fix_blah and libfuturize.fixes.fix_blah):
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125 found = [f for f in avail_fixes
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126 if f.endswith('fix_{0}'.format(fix))]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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127 if len(found) > 1:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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128 print("Ambiguous fixer name. Choose a fully qualified "
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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129 "module name instead from these:\n" +
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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130 "\n".join(" " + myf for myf in found),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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131 file=sys.stderr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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132 return 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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133 elif len(found) == 0:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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134 print("Unknown fixer. Use --list-fixes or -l for a list.",
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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135 file=sys.stderr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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136 return 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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137 unwanted_fixes.add(found[0])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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138
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139 extra_fixes = set()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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140 if options.all_imports:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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141 prefix = 'libpasteurize.fixes.'
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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142 extra_fixes.add(prefix + 'fix_add_all__future__imports')
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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143 extra_fixes.add(prefix + 'fix_add_future_standard_library_import')
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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144 extra_fixes.add(prefix + 'fix_add_all_future_builtins')
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145
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146 explicit = set()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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147 if options.fix:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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148 all_present = False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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149 for fix in options.fix:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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150 if fix == 'all':
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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151 all_present = True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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152 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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153 if ".fix_" in fix:
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154 explicit.add(fix)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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155 else:
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156 # Infer the full module name for the fixer.
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157 # First ensure that no names clash (e.g.
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158 # lib2to3.fixes.fix_blah and libpasteurize.fixes.fix_blah):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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159 found = [f for f in avail_fixes
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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160 if f.endswith('fix_{0}'.format(fix))]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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161 if len(found) > 1:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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162 print("Ambiguous fixer name. Choose a fully qualified "
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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163 "module name instead from these:\n" +
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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164 "\n".join(" " + myf for myf in found),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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165 file=sys.stderr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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166 return 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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167 elif len(found) == 0:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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168 print("Unknown fixer. Use --list-fixes or -l for a list.",
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
169 file=sys.stderr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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170 return 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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171 explicit.add(found[0])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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172 if len(explicit & unwanted_fixes) > 0:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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173 print("Conflicting usage: the following fixers have been "
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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174 "simultaneously requested and disallowed:\n" +
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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175 "\n".join(" " + myf for myf in (explicit & unwanted_fixes)),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
176 file=sys.stderr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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177 return 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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178 requested = avail_fixes.union(explicit) if all_present else explicit
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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179 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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180 requested = avail_fixes.union(explicit)
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181
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182 fixer_names = requested | extra_fixes - unwanted_fixes
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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183
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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184 # Initialize the refactoring tool
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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185 rt = StdoutRefactoringTool(sorted(fixer_names), flags, set(),
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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186 options.nobackups, not options.no_diffs)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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187
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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188 # Refactor all files and directories passed as arguments
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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189 if not rt.errors:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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190 if refactor_stdin:
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191 rt.refactor_stdin()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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192 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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193 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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194 rt.refactor(args, options.write, None,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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195 options.processes)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
196 except refactor.MultiprocessingUnsupported:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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197 assert options.processes > 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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198 print("Sorry, -j isn't " \
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
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199 "supported on this platform.", file=sys.stderr)
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parents:
diff changeset
200 return 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
201 rt.summarize()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
202
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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203 # Return error status (0 if rt.errors is zero)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
204 return int(bool(rt.errors))