more code updates

- 2021 copyright
- remove unneeded compat functions
- remove unneeded filter constructs
- bytestring_passthrough mode doesn't actually do anything,
  as Py3k StringIO doesn't accept bytes in any case, remove this
- should we call ourselves 2.0 and do semver ?

Change-Id: I8a8cb5e78037b758e58c87d5d7b4f66b6c211419

Author: zzzeek

doc/build/unreleased/bytestring_passthrough.rst

@@ -0,0 +1,5 @@
+.. change::
+    :tags: py3k
+
+    The ``bytestring_passthrough`` template argument is removed, as this
+    flag only applied to Python 2.

mako/__init__.py

@@ -1,5 +1,5 @@
 # mako/__init__.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php

mako/_ast_util.py

@@ -1,5 +1,5 @@
 # mako/_ast_util.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
@@ -47,7 +47,6 @@
 from _ast import UAdd
 from _ast import USub
 
-from mako.compat import arg_stringname
 
 BOOLOP_SYMBOLS = {And: "and", Or: "or"}
 
@@ -94,9 +93,7 @@ def parse(expr, filename="<unknown>", mode="exec"):
 
 def iter_fields(node):
     """Iterate over all fields of a node, only yielding existing fields."""
-    # CPython 2.5 compat
-    if not hasattr(node, "_fields") or not node._fields:
-        return
+
     for field in node._fields:
         try:
             yield field, getattr(node, field)
@@ -266,10 +263,10 @@ def write_comma():
                 self.visit(default)
         if node.vararg is not None:
             write_comma()
-            self.write("*" + arg_stringname(node.vararg))
+            self.write("*" + node.vararg.arg)
         if node.kwarg is not None:
             write_comma()
-            self.write("**" + arg_stringname(node.kwarg))
+            self.write("**" + node.kwarg.arg)
 
     def decorators(self, node):
         for decorator in node.decorator_list:

mako/ast.py

@@ -1,5 +1,5 @@
 # mako/ast.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
@@ -87,7 +87,7 @@ def __init__(self, code, **exception_kwargs):
         if not m:
             raise exceptions.CompileException(
                 "Fragment '%s' is not a partial control statement" % code,
-                **exception_kwargs
+                **exception_kwargs,
             )
         if m.group(3):
             code = code[: m.start(3)]
@@ -105,7 +105,7 @@ def __init__(self, code, **exception_kwargs):
         else:
             raise exceptions.CompileException(
                 "Unsupported control keyword: '%s'" % keyword,
-                **exception_kwargs
+                **exception_kwargs,
             )
         super(PythonFragment, self).__init__(code, **exception_kwargs)
 
@@ -123,13 +123,13 @@ def __init__(self, code, allow_kwargs=True, **exception_kwargs):
         if not hasattr(self, "funcname"):
             raise exceptions.CompileException(
                 "Code '%s' is not a function declaration" % code,
-                **exception_kwargs
+                **exception_kwargs,
             )
         if not allow_kwargs and self.kwargs:
             raise exceptions.CompileException(
                 "'**%s' keyword argument not allowed here"
                 % self.kwargnames[-1],
-                **exception_kwargs
+                **exception_kwargs,
             )
 
     def get_argument_expressions(self, as_call=False):

mako/cache.py

@@ -1,5 +1,5 @@
 # mako/cache.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php

mako/cmd.py

@@ -1,5 +1,5 @@
 # mako/cmd.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
@@ -85,7 +85,7 @@ def cmdline(argv=None):
         except:
             _exit()
 
-    kw = dict([varsplit(var) for var in options.var])
+    kw = dict(varsplit(var) for var in options.var)
     try:
         rendered = template.render(**kw)
     except:

mako/codegen.py

@@ -1,5 +1,5 @@
 # mako/codegen.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
@@ -12,7 +12,6 @@
 import time
 
 from mako import ast
-from mako import compat
 from mako import exceptions
 from mako import filters
 from mako import parsetree
@@ -25,8 +24,8 @@
 # names which are hardwired into the
 # template and are not accessed via the
 # context itself
-TOPLEVEL_DECLARED = set(["UNDEFINED", "STOP_RENDERING"])
-RESERVED_NAMES = set(["context", "loop"]).union(TOPLEVEL_DECLARED)
+TOPLEVEL_DECLARED = {"UNDEFINED", "STOP_RENDERING"}
+RESERVED_NAMES = {"context", "loop"}.union(TOPLEVEL_DECLARED)
 
 
 def compile(  # noqa
@@ -393,7 +392,7 @@ def visitDefOrBase(s, node):
                             raise exceptions.CompileException(
                                 "Can't put anonymous blocks inside "
                                 "<%namespace>",
-                                **node.exception_kwargs
+                                **node.exception_kwargs,
                             )
                         self.write_inline_def(node, identifiers, nested=False)
                         export.append(node.funcname)
@@ -470,7 +469,7 @@ def write_variable_declares(self, identifiers, toplevel=False, limit=None):
         """
 
         # collection of all defs available to us in this scope
-        comp_idents = dict([(c.funcname, c) for c in identifiers.defs])
+        comp_idents = {c.funcname: c for c in identifiers.defs}
         to_write = set()
 
         # write "context.get()" for all variables we are going to
@@ -846,11 +845,11 @@ def visitControlLine(self, node):
             #          and end control lines, and
             #    3) any control line with no content other than comments
             if not children or (
-                compat.all(
+                all(
                     isinstance(c, (parsetree.Comment, parsetree.ControlLine))
                     for c in children
                 )
-                and compat.all(
+                and all(
                     (node.is_ternary(c.keyword) or c.isend)
                     for c in children
                     if isinstance(c, parsetree.ControlLine)
@@ -1157,7 +1156,7 @@ def _check_name_exists(self, collection, node):
             raise exceptions.CompileException(
                 "%%def or %%block named '%s' already "
                 "exists in this template." % node.funcname,
-                **node.exception_kwargs
+                **node.exception_kwargs,
             )
 
     def visitDefTag(self, node):
@@ -1187,15 +1186,15 @@ def visitBlockTag(self, node):
                 raise exceptions.CompileException(
                     "Named block '%s' not allowed inside of def '%s'"
                     % (node.name, self.node.name),
-                    **node.exception_kwargs
+                    **node.exception_kwargs,
                 )
             elif isinstance(
                 self.node, (parsetree.CallTag, parsetree.CallNamespaceTag)
             ):
                 raise exceptions.CompileException(
                     "Named block '%s' not allowed inside of <%%call> tag"
                     % (node.name,),
-                    **node.exception_kwargs
+                    **node.exception_kwargs,
                 )
 
         for ident in node.undeclared_identifiers():

mako/compat.py

@@ -1,5 +1,5 @@
 # mako/compat.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
@@ -46,53 +46,16 @@ def inspect_getargspec(func):
     return ArgSpec(args, varargs, varkw, func.__defaults__)
 
 
-def octal(lit):
-    return eval("0o" + lit)
-
-
 def load_module(module_id, path):
     spec = util.spec_from_file_location(module_id, path)
     module = util.module_from_spec(spec)
     spec.loader.exec_module(module)
     return module
 
 
-def reraise(tp, value, tb=None, cause=None):
-    if cause is not None:
-        value.__cause__ = cause
-    if value.__traceback__ is not tb:
-        raise value.with_traceback(tb)
-    raise value
-
-
 def exception_as():
     return sys.exc_info()[1]
 
 
-all = all  # noqa
-
-
 def exception_name(exc):
     return exc.__class__.__name__
-
-
-################################################
-# cross-compatible metaclass implementation
-# Copyright (c) 2010-2012 Benjamin Peterson
-def with_metaclass(meta, base=object):
-    """Create a base class with a metaclass."""
-    return meta("%sBase" % meta.__name__, (base,), {})
-
-
-################################################
-
-
-def arg_stringname(func_arg):
-    """Gets the string name of a kwarg or vararg
-    In Python3.4 a function's args are
-    of _ast.arg type not _ast.name
-    """
-    if hasattr(func_arg, "arg"):
-        return func_arg.arg
-    else:
-        return str(func_arg)

mako/exceptions.py

@@ -1,5 +1,5 @@
 # mako/exceptions.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php

mako/ext/autohandler.py

@@ -1,5 +1,5 @@
 # ext/autohandler.py
-# Copyright 2006-2020 the Mako authors and contributors <see AUTHORS file>
+# Copyright 2006-2021 the Mako authors and contributors <see AUTHORS file>
 #
 # This module is part of Mako and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php