cpython/Lib/lib2to3/main.py

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"""
Main program for 2to3.
"""
import sys
import os
import logging
import optparse
from . import refactor
Merged revisions 66511,66548-66549,66644,66646-66652 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r66511 | benjamin.peterson | 2008-09-18 21:49:27 -0500 (Thu, 18 Sep 2008) | 1 line remove a useless if __name__ == '__main__' ........ r66548 | benjamin.peterson | 2008-09-21 21:14:14 -0500 (Sun, 21 Sep 2008) | 1 line avoid the perils of mutable default arguments ........ r66549 | benjamin.peterson | 2008-09-21 21:26:11 -0500 (Sun, 21 Sep 2008) | 1 line some places in RefactoringTool should raise an error instead of logging it ........ r66644 | benjamin.peterson | 2008-09-27 10:45:10 -0500 (Sat, 27 Sep 2008) | 1 line fix doctest refactoring ........ r66646 | benjamin.peterson | 2008-09-27 11:40:13 -0500 (Sat, 27 Sep 2008) | 1 line don't print to stdout when 2to3 is used as a library ........ r66647 | benjamin.peterson | 2008-09-27 12:28:28 -0500 (Sat, 27 Sep 2008) | 1 line let fixer modules and classes have different prefixes ........ r66648 | benjamin.peterson | 2008-09-27 14:02:13 -0500 (Sat, 27 Sep 2008) | 1 line raise errors when 2to3 is used as a library ........ r66649 | benjamin.peterson | 2008-09-27 14:03:38 -0500 (Sat, 27 Sep 2008) | 1 line fix docstring ........ r66650 | benjamin.peterson | 2008-09-27 14:22:21 -0500 (Sat, 27 Sep 2008) | 1 line make use of enumerate ........ r66651 | benjamin.peterson | 2008-09-27 14:24:13 -0500 (Sat, 27 Sep 2008) | 1 line revert last revision; it breaks things ........ r66652 | benjamin.peterson | 2008-09-27 16:03:06 -0500 (Sat, 27 Sep 2008) | 1 line add tests for lib2to3.refactor ........
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class StdoutRefactoringTool(refactor.RefactoringTool):
"""
Prints output to stdout.
"""
def __init__(self, fixers, options, explicit, nobackups):
self.nobackups = nobackups
super(StdoutRefactoringTool, self).__init__(fixers, options, explicit)
Merged revisions 66511,66548-66549,66644,66646-66652 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r66511 | benjamin.peterson | 2008-09-18 21:49:27 -0500 (Thu, 18 Sep 2008) | 1 line remove a useless if __name__ == '__main__' ........ r66548 | benjamin.peterson | 2008-09-21 21:14:14 -0500 (Sun, 21 Sep 2008) | 1 line avoid the perils of mutable default arguments ........ r66549 | benjamin.peterson | 2008-09-21 21:26:11 -0500 (Sun, 21 Sep 2008) | 1 line some places in RefactoringTool should raise an error instead of logging it ........ r66644 | benjamin.peterson | 2008-09-27 10:45:10 -0500 (Sat, 27 Sep 2008) | 1 line fix doctest refactoring ........ r66646 | benjamin.peterson | 2008-09-27 11:40:13 -0500 (Sat, 27 Sep 2008) | 1 line don't print to stdout when 2to3 is used as a library ........ r66647 | benjamin.peterson | 2008-09-27 12:28:28 -0500 (Sat, 27 Sep 2008) | 1 line let fixer modules and classes have different prefixes ........ r66648 | benjamin.peterson | 2008-09-27 14:02:13 -0500 (Sat, 27 Sep 2008) | 1 line raise errors when 2to3 is used as a library ........ r66649 | benjamin.peterson | 2008-09-27 14:03:38 -0500 (Sat, 27 Sep 2008) | 1 line fix docstring ........ r66650 | benjamin.peterson | 2008-09-27 14:22:21 -0500 (Sat, 27 Sep 2008) | 1 line make use of enumerate ........ r66651 | benjamin.peterson | 2008-09-27 14:24:13 -0500 (Sat, 27 Sep 2008) | 1 line revert last revision; it breaks things ........ r66652 | benjamin.peterson | 2008-09-27 16:03:06 -0500 (Sat, 27 Sep 2008) | 1 line add tests for lib2to3.refactor ........
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def log_error(self, msg, *args, **kwargs):
self.errors.append((msg, args, kwargs))
self.logger.error(msg, *args, **kwargs)
def write_file(self, new_text, filename, old_text):
if not self.nobackups:
# Make backup
backup = filename + ".bak"
if os.path.lexists(backup):
try:
os.remove(backup)
except os.error, err:
self.log_message("Can't remove backup %s", backup)
try:
os.rename(filename, backup)
except os.error, err:
self.log_message("Can't rename %s to %s", filename, backup)
# Actually write the new file
super(StdoutRefactoringTool, self).write_file(new_text,
filename, old_text)
Merged revisions 66511,66548-66549,66644,66646-66652 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r66511 | benjamin.peterson | 2008-09-18 21:49:27 -0500 (Thu, 18 Sep 2008) | 1 line remove a useless if __name__ == '__main__' ........ r66548 | benjamin.peterson | 2008-09-21 21:14:14 -0500 (Sun, 21 Sep 2008) | 1 line avoid the perils of mutable default arguments ........ r66549 | benjamin.peterson | 2008-09-21 21:26:11 -0500 (Sun, 21 Sep 2008) | 1 line some places in RefactoringTool should raise an error instead of logging it ........ r66644 | benjamin.peterson | 2008-09-27 10:45:10 -0500 (Sat, 27 Sep 2008) | 1 line fix doctest refactoring ........ r66646 | benjamin.peterson | 2008-09-27 11:40:13 -0500 (Sat, 27 Sep 2008) | 1 line don't print to stdout when 2to3 is used as a library ........ r66647 | benjamin.peterson | 2008-09-27 12:28:28 -0500 (Sat, 27 Sep 2008) | 1 line let fixer modules and classes have different prefixes ........ r66648 | benjamin.peterson | 2008-09-27 14:02:13 -0500 (Sat, 27 Sep 2008) | 1 line raise errors when 2to3 is used as a library ........ r66649 | benjamin.peterson | 2008-09-27 14:03:38 -0500 (Sat, 27 Sep 2008) | 1 line fix docstring ........ r66650 | benjamin.peterson | 2008-09-27 14:22:21 -0500 (Sat, 27 Sep 2008) | 1 line make use of enumerate ........ r66651 | benjamin.peterson | 2008-09-27 14:24:13 -0500 (Sat, 27 Sep 2008) | 1 line revert last revision; it breaks things ........ r66652 | benjamin.peterson | 2008-09-27 16:03:06 -0500 (Sat, 27 Sep 2008) | 1 line add tests for lib2to3.refactor ........
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def print_output(self, lines):
for line in lines:
print line
def main(fixer_pkg, args=None):
"""Main program.
Args:
fixer_pkg: the name of a package where the fixers are located.
args: optional; a list of command line arguments. If omitted,
sys.argv[1:] is used.
Returns a suggested exit status (0, 1, 2).
"""
# Set up option parser
parser = optparse.OptionParser(usage="refactor.py [options] file|dir ...")
parser.add_option("-d", "--doctests_only", action="store_true",
help="Fix up doctests only")
parser.add_option("-f", "--fix", action="append", default=[],
help="Each FIX specifies a transformation; default: all")
parser.add_option("-x", "--nofix", action="append", default=[],
help="Prevent a fixer from being run.")
parser.add_option("-l", "--list-fixes", action="store_true",
help="List available transformations (fixes/fix_*.py)")
parser.add_option("-p", "--print-function", action="store_true",
help="Modify the grammar so that print() is a function")
parser.add_option("-v", "--verbose", action="store_true",
help="More verbose logging")
parser.add_option("-w", "--write", action="store_true",
help="Write back modified files")
parser.add_option("-n", "--nobackups", action="store_true", default=False,
help="Don't write backups for modified files.")
# Parse command line arguments
refactor_stdin = False
options, args = parser.parse_args(args)
if not options.write and options.nobackups:
parser.error("Can't use -n without -w")
if options.list_fixes:
print "Available transformations for the -f/--fix option:"
for fixname in refactor.get_all_fix_names(fixer_pkg):
print fixname
if not args:
return 0
if not args:
print >>sys.stderr, "At least one file or directory argument required."
print >>sys.stderr, "Use --help to show usage."
return 2
if "-" in args:
refactor_stdin = True
if options.write:
print >>sys.stderr, "Can't write to stdin."
return 2
# Set up logging handler
level = logging.DEBUG if options.verbose else logging.INFO
logging.basicConfig(format='%(name)s: %(message)s', level=level)
# Initialize the refactoring tool
rt_opts = {"print_function" : options.print_function}
avail_fixes = set(refactor.get_fixers_from_package(fixer_pkg))
unwanted_fixes = set(fixer_pkg + ".fix_" + fix for fix in options.nofix)
explicit = set()
if options.fix:
all_present = False
for fix in options.fix:
if fix == "all":
all_present = True
else:
explicit.add(fixer_pkg + ".fix_" + fix)
requested = avail_fixes.union(explicit) if all_present else explicit
else:
requested = avail_fixes.union(explicit)
fixer_names = requested.difference(unwanted_fixes)
rt = StdoutRefactoringTool(sorted(fixer_names), rt_opts, sorted(explicit),
options.nobackups)
# Refactor all files and directories passed as arguments
if not rt.errors:
if refactor_stdin:
rt.refactor_stdin()
else:
rt.refactor(args, options.write, options.doctests_only)
rt.summarize()
# Return error status (0 if rt.errors is zero)
return int(bool(rt.errors))