Initial revision

diff --git a/Tools/scripts/classfix.py b/Tools/scripts/classfix.py
new file mode 100755 (executable)
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--- /dev/null
+++ b/Tools/scripts/classfix.py
@@ -0,0 +1,157 @@
+#! /usr/local/python
+
+# Fix Python source files to use the new class definition syntax,
+# i.e.,
+#      class C(base, base, ...): ...
+# instead of
+#      class C() = base(), base(), ...: ...
+#
+# 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).
+#
+# Undoubtedly you can do this using find and sed, 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.
+#
+# Changes made are reported to stdout in a diff-like format.
+
+import sys
+import regexp
+import posix
+import path
+import string
+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: classfix file-or-directory ...\n')
+               sys.exit(2)
+       for arg in sys.argv[1:]:
+               if path.isdir(arg):
+                       if recursedown(arg): bad = 1
+               elif path.islink(arg):
+                       err(arg + ': will not process symbolic links\n')
+                       bad = 1
+               else:
+                       if fix(arg): bad = 1
+       sys.exit(bad)
+
+ispython = regexp.compile('^[a-zA-Z0-9_]+\.py$').match # This is a method!
+
+def recursedown(dirname):
+       dbg('recursedown(' + `dirname` + ')\n')
+       bad = 0
+       try:
+               names = posix.listdir(dirname)
+       except posix.error, msg:
+               err(dirname + ': cannot list directory: ' + `msg` + '\n')
+               return 1
+       for name in names:
+               if name in ('.', '..'): continue
+               fullname = path.join(dirname, name)
+               if path.islink(fullname): pass
+               elif path.isdir(fullname):
+                       if recursedown(fullname): bad = 1
+               elif ispython(name):
+                       if fix(fullname): bad = 1
+       return bad
+
+# This expression doesn't catch *all* class definition headers,
+# but it's darn pretty close.
+classexpr = '^([ \t]*class +[a-zA-Z0-9_]+) *\( *\) *((=.*)?):'
+findclass = regexp.compile(classexpr).match # This is a method!
+
+baseexpr = '^ *(.*) *\( *\) *$'
+findbase = regexp.compile(baseexpr).match # This is a method, too!
+
+def fix(filename):
+##     dbg('fix(' + `filename` + ')\n')
+       try:
+               f = open(filename, 'r')
+       except IOError, msg:
+               err(filename + ': cannot open: ' + `msg` + '\n')
+               return 1
+       head, tail = path.split(filename)
+       tempname = path.join(head, '@' + tail)
+       tf = None
+       # If we find a match, we rewind the file and start over but
+       # now copy everything to a temp file.
+       while 1:
+               line = f.readline()
+               if not line: break
+               res = findclass(line)
+               if not res:
+                       if tf: tf.write(line)
+                       continue
+               if not tf:
+                       try:
+                               tf = open(tempname, 'w')
+                       except IOError, msg:
+                               f.close()
+                               err(tempname+': cannot create: '+`msg`+'\n')
+                               return 1
+                       rep(filename + ':\n')
+                       # Rewind the input file and start all over:
+                       f.seek(0)
+                       continue
+               a0, b0 = res[0] # Whole match (up to ':')
+               a1, b1 = res[1] # First subexpression (up to classname)
+               a2, b2 = res[2] # Second subexpression (=.*)
+               head = line[:b1]
+               tail = line[b0:] # Unmatched rest of line
+               if a2 = b2: # No base classes -- easy case
+                       newline = head + ':' + tail
+               else:
+                       # Get rid of leading '='
+                       basepart = line[a2+1:b2]
+                       # Extract list of base expressions
+                       bases = string.splitfields(basepart, ',')
+                       # Strip trailing '()' from each base expression
+                       for i in range(len(bases)):
+                               res = findbase(bases[i])
+                               if res:
+                                       (x0, y0), (x1, y1) = res
+                                       bases[i] = bases[i][x1:y1]
+                       # Join the bases back again and build the new line
+                       basepart = string.joinfields(bases, ', ')
+                       newline = head + '(' + basepart + '):' + tail
+               rep('< ' + line)
+               rep('> ' + newline)
+               tf.write(newline)
+       f.close()
+       if not tf: return 0 # No changes
+       
+       # Finishing touch -- move files
+
+       # First copy the file's mode to the temp file
+       try:
+               statbuf = posix.stat(filename)
+               posix.chmod(tempname, statbuf[ST_MODE] & 0x7777)
+       except posix.error, msg:
+               err(tempname + ': warning: chmod failed (' + `msg` + ')\n')
+       # Then make a backup of the original file as filename~
+       try:
+               posix.rename(filename, filename + '~')
+       except posix.error, msg:
+               err(filename + ': warning: backup failed (' + `msg` + ')\n')
+       # Now move the temp file to the original file
+       try:
+               posix.rename(tempname, filename)
+       except posix.error, msg:
+               err(filename + ': rename failed (' + `msg` + ')\n')
+               return 1
+       # Return succes
+       return 0
+
+main()