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✏️ findnocoding.py
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#! /usr/bin/python2.7 """List all those Python files that require a coding directive Usage: nocoding.py dir1 [dir2...] """ __author__ = "Oleg Broytmann, Georg Brandl" import sys, os, re, getopt # our pysource module finds Python source files try: import pysource except ImportError: # emulate the module with a simple os.walk class pysource: has_python_ext = looks_like_python = can_be_compiled = None def walk_python_files(self, paths, *args, **kwargs): for path in paths: if os.path.isfile(path): yield path.endswith(".py") elif os.path.isdir(path): for root, dirs, files in os.walk(path): for filename in files: if filename.endswith(".py"): yield os.path.join(root, filename) pysource = pysource() print >>sys.stderr, ("The pysource module is not available; " "no sophisticated Python source file search will be done.") decl_re = re.compile(r'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)') blank_re = re.compile(r'^[ \t\f]*(?:[#\r\n]|$)') def get_declaration(line): match = decl_re.match(line) if match: return match.group(1) return b'' def has_correct_encoding(text, codec): try: unicode(text, codec) except UnicodeDecodeError: return False else: return True def needs_declaration(fullpath): try: infile = open(fullpath, 'rU') except IOError: # Oops, the file was removed - ignore it return None line1 = infile.readline() line2 = infile.readline() if (get_declaration(line1) or blank_re.match(line1) and get_declaration(line2)): # the file does have an encoding declaration, so trust it infile.close() return False # check the whole file for non-ASCII characters rest = infile.read() infile.close() if has_correct_encoding(line1+line2+rest, "ascii"): return False return True usage = """Usage: %s [-cd] paths... -c: recognize Python source files trying to compile them -d: debug output""" % sys.argv[0] try: opts, args = getopt.getopt(sys.argv[1:], 'cd') except getopt.error, msg: print >>sys.stderr, msg print >>sys.stderr, usage sys.exit(1) is_python = pysource.looks_like_python debug = False for o, a in opts: if o == '-c': is_python = pysource.can_be_compiled elif o == '-d': debug = True if not args: print >>sys.stderr, usage sys.exit(1) for fullpath in pysource.walk_python_files(args, is_python): if debug: print "Testing for coding: %s" % fullpath result = needs_declaration(fullpath) if result: print fullpath
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