EcchiShell v1.0

lib64

python2.7

> sys.stderr, msg print >> sys.stderr, __doc__ def errprint(*args): sep = "" for arg in args: sys.stderr.write(sep + str(arg)) sep = " " sys.stderr.write("\n") def main(): import getopt global verbose, recurse, dryrun, makebackup try: opts, args = getopt.getopt(sys.argv[1:], "drnvh", ["dryrun", "recurse", "nobackup", "verbose", "help"]) except getopt.error, msg: usage(msg) return for o, a in opts: if o in ('-d', '--dryrun'): dryrun += 1 elif o in ('-r', '--recurse'): recurse += 1 elif o in ('-n', '--nobackup'): makebackup = False elif o in ('-v', '--verbose'): verbose += 1 elif o in ('-h', '--help'): usage() return if not args: r = Reindenter(sys.stdin) r.run() r.write(sys.stdout) return for arg in args: check(arg) def check(file): if os.path.isdir(file) and not os.path.islink(file): if verbose: print "listing directory", file names = os.listdir(file) for name in names: fullname = os.path.join(file, name) if ((recurse and os.path.isdir(fullname) and not os.path.islink(fullname) and not os.path.split(fullname)[1].startswith(".")) or name.lower().endswith(".py")): check(fullname) return if verbose: print "checking", file, "...", try: f = io.open(file) except IOError, msg: errprint("%s: I/O Error: %s" % (file, str(msg))) return r = Reindenter(f) f.close() newline = r.newlines if isinstance(newline, tuple): errprint("%s: mixed newlines detected; cannot process file" % file) return if r.run(): if verbose: print "changed." if dryrun: print "But this is a dry run, so leaving it alone." if not dryrun: bak = file + ".bak" if makebackup: shutil.copyfile(file, bak) if verbose: print "backed up", file, "to", bak f = io.open(file, "w", newline=newline) r.write(f) f.close() if verbose: print "wrote new", file return True else: if verbose: print "unchanged." return False def _rstrip(line, JUNK='\n \t'): """Return line stripped of trailing spaces, tabs, newlines. Note that line.rstrip() instead also strips sundry control characters, but at least one known Emacs user expects to keep junk like that, not mentioning Barry by name or anything . """ i = len(line) while i > 0 and line[i-1] in JUNK: i -= 1 return line[:i] class Reindenter: def __init__(self, f): self.find_stmt = 1 # next token begins a fresh stmt? self.level = 0 # current indent level # Raw file lines. self.raw = f.readlines() # File lines, rstripped & tab-expanded. Dummy at start is so # that we can use tokenize's 1-based line numbering easily. # Note that a line is all-blank iff it's "\n". self.lines = [_rstrip(line).expandtabs() + "\n" for line in self.raw] self.lines.insert(0, None) self.index = 1 # index into self.lines of next line # List of (lineno, indentlevel) pairs, one for each stmt and # comment line. indentlevel is -1 for comment lines, as a # signal that tokenize doesn't know what to do about them; # indeed, they're our headache! self.stats = [] # Save the newlines found in the file so they can be used to # create output without mutating the newlines. self.newlines = f.newlines def run(self): tokenize.tokenize(self.getline, self.tokeneater) # Remove trailing empty lines. lines = self.lines while lines and lines[-1] == "\n": lines.pop() # Sentinel. stats = self.stats stats.append((len(lines), 0)) # Map count of leading spaces to # we want. have2want = {} # Program after transformation. after = self.after = [] # Copy over initial empty lines -- there's nothing to do until # we see a line with *something* on it. i = stats[0][0] after.extend(lines[1:i]) for i in range(len(stats)-1): thisstmt, thislevel = stats[i] nextstmt = stats[i+1][0] have = getlspace(lines[thisstmt]) want = thislevel * 4 if want < 0: # A comment line. if have: # An indented comment line. If we saw the same # indentation before, reuse what it most recently # mapped to. want = have2want.get(have, -1) if want < 0: # Then it probably belongs to the next real stmt. for j in xrange(i+1, len(stats)-1): jline, jlevel = stats[j] if jlevel >= 0: if have == getlspace(lines[jline]): want = jlevel * 4 break if want < 0: # Maybe it's a hanging # comment like this one, # in which case we should shift it like its base # line got shifted. for j in xrange(i-1, -1, -1): jline, jlevel = stats[j] if jlevel >= 0: want = have + getlspace(after[jline-1]) - \ getlspace(lines[jline]) break if want < 0: # Still no luck -- leave it alone. want = have else: want = 0 assert want >= 0 have2want[have] = want diff = want - have if diff == 0 or have == 0: after.extend(lines[thisstmt:nextstmt]) else: for line in lines[thisstmt:nextstmt]: if diff > 0: if line == "\n": after.append(line) else: after.append(" " * diff + line) else: remove = min(getlspace(line), -diff) after.append(line[remove:]) return self.raw != self.after def write(self, f): f.writelines(self.after) # Line-getter for tokenize. def getline(self): if self.index >= len(self.lines): line = "" else: line = self.lines[self.index] self.index += 1 return line # Line-eater for tokenize. def tokeneater(self, type, token, (sline, scol), end, line, INDENT=tokenize.INDENT, DEDENT=tokenize.DEDENT, NEWLINE=tokenize.NEWLINE, COMMENT=tokenize.COMMENT, NL=tokenize.NL): 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+)? self.find_stmt = 1 elif type == INDENT: self.find_stmt = 1 self.level += 1 elif type == DEDENT: self.find_stmt = 1 self.level -= 1 elif type == COMMENT: if self.find_stmt: self.stats.append((sline, -1)) # but we're still looking for a new stmt, so leave # find_stmt alone elif type == NL: pass elif self.find_stmt: # This is the first "real token" following a NEWLINE, so it # must be the first token of the next program statement, or an # ENDMARKER. self.find_stmt = 0 if line: # not endmarker self.stats.append((sline, self.level)) # Count number of leading blanks. def getlspace(line): i, n = 0, len(line) while i < n and line[i] == " ": i += 1 return i if __name__ == '__main__': main()