Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 1da43e5e916949c8e849e656d9d05fa4b9d6836c authored by Benjamin Peterson on 26 June 2009, 13:21:52 UTC
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
Tip revision: 1da43e5
main.py
"""
Main program for 2to3.
"""
import sys
import os
import logging
import shutil
import optparse
from . import refactor
class StdoutRefactoringTool(refactor.MultiprocessRefactoringTool):
"""
Prints output to stdout.
"""
def __init__(self, fixers, options, explicit, nobackups):
self.nobackups = nobackups
super(StdoutRefactoringTool, self).__init__(fixers, options, explicit)
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, encoding):
if not self.nobackups:
# Make backup
backup = filename + ".bak"
if os.path.lexists(backup):
try:
os.remove(backup)
except os.error as err:
self.log_message("Can't remove backup %s", backup)
try:
os.rename(filename, backup)
except os.error as err:
self.log_message("Can't rename %s to %s", filename, backup)
# Actually write the new file
write = super(StdoutRefactoringTool, self).write_file
write(new_text, filename, old_text, encoding)
if not self.nobackups:
shutil.copymode(backup, filename)
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="2to3 [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("-j", "--processes", action="store", default=1,
type="int", help="Run 2to3 concurrently")
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("At least one file or directory argument required.", file=sys.stderr)
print("Use --help to show usage.", file=sys.stderr)
return 2
if "-" in args:
refactor_stdin = True
if options.write:
print("Can't write to stdin.", file=sys.stderr)
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:
try:
rt.refactor(args, options.write, options.doctests_only,
options.processes)
except refactor.MultiprocessingUnsupported:
assert options.processes > 1
print >> sys.stderr, "Sorry, -j isn't " \
"supported on this platform."
return 1
rt.summarize()
# Return error status (0 if rt.errors is zero)
return int(bool(rt.errors))