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authorGeorg Brandl <georg@python.org>2010-08-02 22:53:22 (GMT)
committerGeorg Brandl <georg@python.org>2010-08-02 22:53:22 (GMT)
commitd3f467ac7441a100eb26412424c2dd96ec3ceb67 (patch)
tree4aa8ff69b527682837f5876bbb5166396db36bec /Tools/scripts/classfix.py
parentf7db42fe8cfc412c8d247a40f48eac43687ec9c7 (diff)
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Update README, remove obsolete scripts.
Diffstat (limited to 'Tools/scripts/classfix.py')
-rwxr-xr-xTools/scripts/classfix.py190
1 files changed, 0 insertions, 190 deletions
diff --git a/Tools/scripts/classfix.py b/Tools/scripts/classfix.py
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--- a/Tools/scripts/classfix.py
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-#! /usr/bin/env python3
-
-# This script is obsolete -- it is kept for historical purposes only.
-#
-# Fix Python source files to use the new class definition syntax, i.e.,
-# the syntax used in Python versions before 0.9.8:
-# class C() = base(), base(), ...: ...
-# is changed to the current syntax:
-# class C(base, base, ...): ...
-#
-# The script uses heuristics to find class definitions that usually
-# work but occasionally can fail; carefully check the output!
-#
-# Command line arguments are files or directories to be processed.
-# Directories are searched recursively for files whose name looks
-# like a python module.
-# Symbolic links are always ignored (except as explicit directory
-# arguments). Of course, the original file is kept as a back-up
-# (with a "~" attached to its name).
-#
-# Changes made are reported to stdout in a diff-like format.
-#
-# Undoubtedly you can do this using find and sed or perl, but this is
-# a nice example of Python code that recurses down a directory tree
-# and uses regular expressions. Also note several subtleties like
-# preserving the file's mode and avoiding to even write a temp file
-# when no changes are needed for a file.
-#
-# NB: by changing only the function fixline() you can turn this
-# into a program for a different change to Python programs...
-
-import sys
-import re
-import os
-from stat import *
-
-err = sys.stderr.write
-dbg = err
-rep = sys.stdout.write
-
-def main():
- bad = 0
- if not sys.argv[1:]: # No arguments
- err('usage: ' + sys.argv[0] + ' file-or-directory ...\n')
- sys.exit(2)
- for arg in sys.argv[1:]:
- if os.path.isdir(arg):
- if recursedown(arg): bad = 1
- elif os.path.islink(arg):
- err(arg + ': will not process symbolic links\n')
- bad = 1
- else:
- if fix(arg): bad = 1
- sys.exit(bad)
-
-ispythonprog = re.compile('^[a-zA-Z0-9_]+\.py$')
-def ispython(name):
- return ispythonprog.match(name) >= 0
-
-def recursedown(dirname):
- dbg('recursedown(%r)\n' % (dirname,))
- bad = 0
- try:
- names = os.listdir(dirname)
- except os.error as msg:
- err('%s: cannot list directory: %r\n' % (dirname, msg))
- return 1
- names.sort()
- subdirs = []
- for name in names:
- if name in (os.curdir, os.pardir): continue
- fullname = os.path.join(dirname, name)
- if os.path.islink(fullname): pass
- elif os.path.isdir(fullname):
- subdirs.append(fullname)
- elif ispython(name):
- if fix(fullname): bad = 1
- for fullname in subdirs:
- if recursedown(fullname): bad = 1
- return bad
-
-def fix(filename):
-## dbg('fix(%r)\n' % (filename,))
- try:
- f = open(filename, 'r')
- except IOError as msg:
- err('%s: cannot open: %r\n' % (filename, msg))
- return 1
- head, tail = os.path.split(filename)
- tempname = os.path.join(head, '@' + tail)
- g = None
- # If we find a match, we rewind the file and start over but
- # now copy everything to a temp file.
- lineno = 0
- while 1:
- line = f.readline()
- if not line: break
- lineno = lineno + 1
- while line[-2:] == '\\\n':
- nextline = f.readline()
- if not nextline: break
- line = line + nextline
- lineno = lineno + 1
- newline = fixline(line)
- if newline != line:
- if g is None:
- try:
- g = open(tempname, 'w')
- except IOError as msg:
- f.close()
- err('%s: cannot create: %r\n' % (tempname, msg))
- return 1
- f.seek(0)
- lineno = 0
- rep(filename + ':\n')
- continue # restart from the beginning
- rep(repr(lineno) + '\n')
- rep('< ' + line)
- rep('> ' + newline)
- if g is not None:
- g.write(newline)
-
- # End of file
- f.close()
- if not g: return 0 # No changes
-
- # Finishing touch -- move files
-
- # First copy the file's mode to the temp file
- try:
- statbuf = os.stat(filename)
- os.chmod(tempname, statbuf[ST_MODE] & 0o7777)
- except os.error as msg:
- err('%s: warning: chmod failed (%r)\n' % (tempname, msg))
- # Then make a backup of the original file as filename~
- try:
- os.rename(filename, filename + '~')
- except os.error as msg:
- err('%s: warning: backup failed (%r)\n' % (filename, msg))
- # Now move the temp file to the original file
- try:
- os.rename(tempname, filename)
- except os.error as msg:
- err('%s: rename failed (%r)\n' % (filename, msg))
- return 1
- # Return succes
- return 0
-
-# This expression doesn't catch *all* class definition headers,
-# but it's pretty darn close.
-classexpr = '^([ \t]*class +[a-zA-Z0-9_]+) *( *) *((=.*)?):'
-classprog = re.compile(classexpr)
-
-# Expressions for finding base class expressions.
-baseexpr = '^ *(.*) *( *) *$'
-baseprog = re.compile(baseexpr)
-
-def fixline(line):
- if classprog.match(line) < 0: # No 'class' keyword -- no change
- return line
-
- (a0, b0), (a1, b1), (a2, b2) = classprog.regs[:3]
- # a0, b0 = Whole match (up to ':')
- # a1, b1 = First subexpression (up to classname)
- # a2, b2 = Second subexpression (=.*)
- head = line[:b1]
- tail = line[b0:] # Unmatched rest of line
-
- if a2 == b2: # No base classes -- easy case
- return head + ':' + tail
-
- # Get rid of leading '='
- basepart = line[a2+1:b2]
-
- # Extract list of base expressions
- bases = basepart.split(',')
-
- # Strip trailing '()' from each base expression
- for i in range(len(bases)):
- if baseprog.match(bases[i]) >= 0:
- x1, y1 = baseprog.regs[1]
- bases[i] = bases[i][x1:y1]
-
- # Join the bases back again and build the new line
- basepart = ', '.join(bases)
-
- return head + '(' + basepart + '):' + tail
-
-if __name__ == '__main__':
- main()