From a02c898e69ad8c0a7f46710f300eca818148af00 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 23 Feb 2000 15:33:52 +0000
Subject: Moved tabnanny.py to standard library status.

---
 Tools/scripts/tabnanny.py | 368 ----------------------------------------------
 1 file changed, 368 deletions(-)
 delete mode 100755 Tools/scripts/tabnanny.py

diff --git a/Tools/scripts/tabnanny.py b/Tools/scripts/tabnanny.py
deleted file mode 100755
index c5adfb5..0000000
--- a/Tools/scripts/tabnanny.py
+++ /dev/null
@@ -1,368 +0,0 @@
-#! /usr/bin/env python
-
-"""The Tab Nanny despises ambiguous indentation.  She knows no mercy."""
-
-# Released to the public domain, by Tim Peters, 15 April 1998.
-
-__version__ = "6"
-
-import os
-import sys
-import string
-import getopt
-import tokenize
-
-verbose = 0
-filename_only = 0
-
-def errprint(*args):
-    sep = ""
-    for arg in args:
-        sys.stderr.write(sep + str(arg))
-        sep = " "
-    sys.stderr.write("\n")
-
-def main():
-    global verbose, filename_only
-    try:
-        opts, args = getopt.getopt(sys.argv[1:], "qv")
-    except getopt.error, msg:
-        errprint(msg)
-        return
-    for o, a in opts:
-        if o == '-q':
-            filename_only = filename_only + 1
-        if o == '-v':
-            verbose = verbose + 1
-    if not args:
-        errprint("Usage:", sys.argv[0], "[-v] file_or_directory ...")
-        return
-    for arg in args:
-        check(arg)
-
-class NannyNag:
-    def __init__(self, lineno, msg, line):
-        self.lineno, self.msg, self.line = lineno, msg, line
-    def get_lineno(self):
-        return self.lineno
-    def get_msg(self):
-        return self.msg
-    def get_line(self):
-        return self.line
-
-def check(file):
-    if os.path.isdir(file) and not os.path.islink(file):
-        if verbose:
-            print "%s: listing directory" % `file`
-        names = os.listdir(file)
-        for name in names:
-            fullname = os.path.join(file, name)
-            if (os.path.isdir(fullname) and
-                not os.path.islink(fullname) or
-                os.path.normcase(name[-3:]) == ".py"):
-                check(fullname)
-        return
-
-    try:
-        f = open(file)
-    except IOError, msg:
-        errprint("%s: I/O Error: %s" % (`file`, str(msg)))
-        return
-
-    if verbose > 1:
-        print "checking", `file`, "..."
-
-    reset_globals()
-    try:
-        tokenize.tokenize(f.readline, tokeneater)
-
-    except tokenize.TokenError, msg:
-        errprint("%s: Token Error: %s" % (`file`, str(msg)))
-        return
-
-    except NannyNag, nag:
-        badline = nag.get_lineno()
-        line = nag.get_line()
-        if verbose:
-            print "%s: *** Line %d: trouble in tab city! ***" % (
-                `file`, badline)
-            print "offending line:", `line`
-            print nag.get_msg()
-        else:
-            if ' ' in file: file = '"' + file + '"'
-            if filename_only: print file
-            else: print file, badline, `line`
-        return
-
-    if verbose:
-        print "%s: Clean bill of health." % `file`
-
-class Whitespace:
-    # the characters used for space and tab
-    S, T = ' \t'
-
-    # members:
-    #   raw
-    #       the original string
-    #   n
-    #       the number of leading whitespace characters in raw
-    #   nt
-    #       the number of tabs in raw[:n]
-    #   norm
-    #       the normal form as a pair (count, trailing), where:
-    #       count
-    #           a tuple such that raw[:n] contains count[i]
-    #           instances of S * i + T
-    #       trailing
-    #           the number of trailing spaces in raw[:n]
-    #       It's A Theorem that m.indent_level(t) ==
-    #       n.indent_level(t) for all t >= 1 iff m.norm == n.norm.
-    #   is_simple
-    #       true iff raw[:n] is of the form (T*)(S*)
-
-    def __init__(self, ws):
-        self.raw  = ws
-        S, T = Whitespace.S, Whitespace.T
-        count = []
-        b = n = nt = 0
-        for ch in self.raw:
-            if ch == S:
-                n = n + 1
-                b = b + 1
-            elif ch == T:
-                n = n + 1
-                nt = nt + 1
-                if b >= len(count):
-                    count = count + [0] * (b - len(count) + 1)
-                count[b] = count[b] + 1
-                b = 0
-            else:
-                break
-        self.n    = n
-        self.nt   = nt
-        self.norm = tuple(count), b
-        self.is_simple = len(count) <= 1
-
-    # return length of longest contiguous run of spaces (whether or not
-    # preceding a tab)
-    def longest_run_of_spaces(self):
-        count, trailing = self.norm
-        return max(len(count)-1, trailing)
-
-    def indent_level(self, tabsize):
-        # count, il = self.norm
-        # for i in range(len(count)):
-        #    if count[i]:
-        #        il = il + (i/tabsize + 1)*tabsize * count[i]
-        # return il
-
-        # quicker:
-        # il = trailing + sum (i/ts + 1)*ts*count[i] =
-        # trailing + ts * sum (i/ts + 1)*count[i] =
-        # trailing + ts * sum i/ts*count[i] + count[i] =
-        # trailing + ts * [(sum i/ts*count[i]) + (sum count[i])] =
-        # trailing + ts * [(sum i/ts*count[i]) + num_tabs]
-        # and note that i/ts*count[i] is 0 when i < ts
-
-        count, trailing = self.norm
-        il = 0
-        for i in range(tabsize, len(count)):
-            il = il + i/tabsize * count[i]
-        return trailing + tabsize * (il + self.nt)
-
-    # return true iff self.indent_level(t) == other.indent_level(t)
-    # for all t >= 1
-    def equal(self, other):
-        return self.norm == other.norm
-
-    # return a list of tuples (ts, i1, i2) such that
-    # i1 == self.indent_level(ts) != other.indent_level(ts) == i2.
-    # Intended to be used after not self.equal(other) is known, in which
-    # case it will return at least one witnessing tab size.
-    def not_equal_witness(self, other):
-        n = max(self.longest_run_of_spaces(),
-                other.longest_run_of_spaces()) + 1
-        a = []
-        for ts in range(1, n+1):
-            if self.indent_level(ts) != other.indent_level(ts):
-                a.append( (ts,
-                           self.indent_level(ts),
-                           other.indent_level(ts)) )
-        return a
-
-    # Return true iff self.indent_level(t) < other.indent_level(t)
-    # for all t >= 1.
-    # The algorithm is due to Vincent Broman.
-    # Easy to prove it's correct.
-    # XXXpost that.
-    # Trivial to prove n is sharp (consider T vs ST).
-    # Unknown whether there's a faster general way.  I suspected so at
-    # first, but no longer.
-    # For the special (but common!) case where M and N are both of the
-    # form (T*)(S*), M.less(N) iff M.len() < N.len() and
-    # M.num_tabs() <= N.num_tabs(). Proof is easy but kinda long-winded.
-    # XXXwrite that up.
-    # Note that M is of the form (T*)(S*) iff len(M.norm[0]) <= 1.
-    def less(self, other):
-        if self.n >= other.n:
-            return 0
-        if self.is_simple and other.is_simple:
-            return self.nt <= other.nt
-        n = max(self.longest_run_of_spaces(),
-                other.longest_run_of_spaces()) + 1
-        # the self.n >= other.n test already did it for ts=1
-        for ts in range(2, n+1):
-            if self.indent_level(ts) >= other.indent_level(ts):
-                return 0
-        return 1
-
-    # return a list of tuples (ts, i1, i2) such that
-    # i1 == self.indent_level(ts) >= other.indent_level(ts) == i2.
-    # Intended to be used after not self.less(other) is known, in which
-    # case it will return at least one witnessing tab size.
-    def not_less_witness(self, other):
-        n = max(self.longest_run_of_spaces(),
-                other.longest_run_of_spaces()) + 1
-        a = []
-        for ts in range(1, n+1):
-            if self.indent_level(ts) >= other.indent_level(ts):
-                a.append( (ts,
-                           self.indent_level(ts),
-                           other.indent_level(ts)) )
-        return a
-
-def format_witnesses(w):
-    import string
-    firsts = map(lambda tup: str(tup[0]), w)
-    prefix = "at tab size"
-    if len(w) > 1:
-        prefix = prefix + "s"
-    return prefix + " " + string.join(firsts, ', ')
-
-# The collection of globals, the reset_globals() function, and the
-# tokeneater() function, depend on which version of tokenize is
-# in use.
-
-if hasattr(tokenize, 'NL'):
- # take advantage of Guido's patch!
-
- indents = []
- check_equal = 0
-
- def reset_globals():
-     global indents, check_equal
-     check_equal = 0
-     indents = [Whitespace("")]
-
- def tokeneater(type, token, start, end, line,
-                INDENT=tokenize.INDENT,
-                DEDENT=tokenize.DEDENT,
-                NEWLINE=tokenize.NEWLINE,
-                JUNK=(tokenize.COMMENT, tokenize.NL) ):
-     global indents, check_equal
-
-     if type == NEWLINE:
-         # a program statement, or ENDMARKER, will eventually follow,
-         # after some (possibly empty) run of tokens of the form
-         #     (NL | COMMENT)* (INDENT | DEDENT+)?
-         # If an INDENT appears, setting check_equal is wrong, and will
-         # be undone when we see the INDENT.
-         check_equal = 1
-
-     elif type == INDENT:
-         check_equal = 0
-         thisguy = Whitespace(token)
-         if not indents[-1].less(thisguy):
-             witness = indents[-1].not_less_witness(thisguy)
-             msg = "indent not greater e.g. " + format_witnesses(witness)
-             raise NannyNag(start[0], msg, line)
-         indents.append(thisguy)
-
-     elif type == DEDENT:
-         # there's nothing we need to check here!  what's important is
-         # that when the run of DEDENTs ends, the indentation of the
-         # program statement (or ENDMARKER) that triggered the run is
-         # equal to what's left at the top of the indents stack
-
-         # Ouch!  This assert triggers if the last line of the source
-         # is indented *and* lacks a newline -- then DEDENTs pop out
-         # of thin air.
-         # assert check_equal  # else no earlier NEWLINE, or an earlier INDENT
-         check_equal = 1
-
-         del indents[-1]
-
-     elif check_equal and type not in JUNK:
-         # this is the first "real token" following a NEWLINE, so it
-         # must be the first token of the next program statement, or an
-         # ENDMARKER; the "line" argument exposes the leading whitespace
-         # for this statement; in the case of ENDMARKER, line is an empty
-         # string, so will properly match the empty string with which the
-         # "indents" stack was seeded
-         check_equal = 0
-         thisguy = Whitespace(line)
-         if not indents[-1].equal(thisguy):
-             witness = indents[-1].not_equal_witness(thisguy)
-             msg = "indent not equal e.g. " + format_witnesses(witness)
-             raise NannyNag(start[0], msg, line)
-
-else:
- # unpatched version of tokenize
-
- nesting_level = 0
- indents = []
- check_equal = 0
-
- def reset_globals():
-     global nesting_level, indents, check_equal
-     nesting_level = check_equal = 0
-     indents = [Whitespace("")]
-
- def tokeneater(type, token, start, end, line,
-                INDENT=tokenize.INDENT,
-                DEDENT=tokenize.DEDENT,
-                NEWLINE=tokenize.NEWLINE,
-                COMMENT=tokenize.COMMENT,
-                OP=tokenize.OP):
-     global nesting_level, indents, check_equal
-
-     if type == INDENT:
-         check_equal = 0
-         thisguy = Whitespace(token)
-         if not indents[-1].less(thisguy):
-             witness = indents[-1].not_less_witness(thisguy)
-             msg = "indent not greater e.g. " + format_witnesses(witness)
-             raise NannyNag(start[0], msg, line)
-         indents.append(thisguy)
-
-     elif type == DEDENT:
-         del indents[-1]
-
-     elif type == NEWLINE:
-         if nesting_level == 0:
-             check_equal = 1
-
-     elif type == COMMENT:
-         pass
-
-     elif check_equal:
-         check_equal = 0
-         thisguy = Whitespace(line)
-         if not indents[-1].equal(thisguy):
-             witness = indents[-1].not_equal_witness(thisguy)
-             msg = "indent not equal e.g. " + format_witnesses(witness)
-             raise NannyNag(start[0], msg, line)
-
-     if type == OP and token in ('{', '[', '('):
-         nesting_level = nesting_level + 1
-
-     elif type == OP and token in ('}', ']', ')'):
-         if nesting_level == 0:
-             raise NannyNag(start[0],
-                            "unbalanced bracket '" + token + "'",
-                            line)
-         nesting_level = nesting_level - 1
-
-if __name__ == '__main__':
-    main()
-
-- 
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