grc: added yaml/mako support

Includes basic converter from XML/Cheetah to YAML/Mako based block format.
author: Sebastian Koslowski <sebastian.koslowski@gmail.com> 2016-05-03 17:13:08 +0200
committer: Johnathan Corgan <johnathan@corganlabs.com> 2017-06-29 09:16:49 -0700
commit: 7f7fa2f91467fdb2b11312be8562e7b51fdeb199 (patch)
tree: 24268bac15b9920d2a15ddbb45eaf3b9b03718a1 /grc/core/utils/backports
parent: 44cae388881821942e691a4d69a923bbd8d347db (diff)
3 files changed, 178 insertions, 0 deletions
diff --git a/grc/core/utils/backports/__init__.py b/grc/core/utils/backports/__init__.py
new file mode 100644
index 0000000000..a24ee3ae01
--- /dev/null
+++ b/grc/core/utils/backports/__init__.py
@@ -0,0 +1,25 @@
+# Copyright 2016 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+from __future__ import absolute_import
+
+try:
+    from collections import ChainMap
+except ImportError:
+    from .chainmap import ChainMap
diff --git a/grc/core/utils/backports/chainmap.py b/grc/core/utils/backports/chainmap.py
new file mode 100644
index 0000000000..1f4f4a96fb
--- /dev/null
+++ b/grc/core/utils/backports/chainmap.py
@@ -0,0 +1,106 @@
+# from https://hg.python.org/cpython/file/default/Lib/collections/__init__.py
+
+from collections import MutableMapping
+
+
+class ChainMap(MutableMapping):
+    """ A ChainMap groups multiple dicts (or other mappings) together
+    to create a single, updateable view.
+
+    The underlying mappings are stored in a list.  That list is public and can
+    be accessed or updated using the *maps* attribute.  There is no other
+    state.
+
+    Lookups search the underlying mappings successively until a key is found.
+    In contrast, writes, updates, and deletions only operate on the first
+    mapping.
+
+    """
+
+    def __init__(self, *maps):
+        """Initialize a ChainMap by setting *maps* to the given mappings.
+        If no mappings are provided, a single empty dictionary is used.
+
+        """
+        self.maps = list(maps) or [{}]          # always at least one map
+
+    def __missing__(self, key):
+        raise KeyError(key)
+
+    def __getitem__(self, key):
+        for mapping in self.maps:
+            try:
+                return mapping[key]             # can't use 'key in mapping' with defaultdict
+            except KeyError:
+                pass
+        return self.__missing__(key)            # support subclasses that define __missing__
+
+    def get(self, key, default=None):
+        return self[key] if key in self else default
+
+    def __len__(self):
+        return len(set().union(*self.maps))     # reuses stored hash values if possible
+
+    def __iter__(self):
+        return iter(set().union(*self.maps))
+
+    def __contains__(self, key):
+        return any(key in m for m in self.maps)
+
+    def __bool__(self):
+        return any(self.maps)
+
+    def __repr__(self):
+        return '{0.__class__.__name__}({1})'.format(
+            self, ', '.join(map(repr, self.maps)))
+
+    @classmethod
+    def fromkeys(cls, iterable, *args):
+        """Create a ChainMap with a single dict created from the iterable."""
+        return cls(dict.fromkeys(iterable, *args))
+
+    def copy(self):
+        """New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]"""
+        return self.__class__(self.maps[0].copy(), *self.maps[1:])
+
+    __copy__ = copy
+
+    def new_child(self, m=None):                # like Django's Context.push()
+        """New ChainMap with a new map followed by all previous maps.
+        If no map is provided, an empty dict is used.
+        """
+        if m is None:
+            m = {}
+        return self.__class__(m, *self.maps)
+
+    @property
+    def parents(self):                          # like Django's Context.pop()
+        """New ChainMap from maps[1:]."""
+        return self.__class__(*self.maps[1:])
+
+    def __setitem__(self, key, value):
+        self.maps[0][key] = value
+
+    def __delitem__(self, key):
+        try:
+            del self.maps[0][key]
+        except KeyError:
+            raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+    def popitem(self):
+        """Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty."""
+        try:
+            return self.maps[0].popitem()
+        except KeyError:
+            raise KeyError('No keys found in the first mapping.')
+
+    def pop(self, key, *args):
+        """Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0]."""
+        try:
+            return self.maps[0].pop(key, *args)
+        except KeyError:
+            raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+    def clear(self):
+        """Clear maps[0], leaving maps[1:] intact."""
+        self.maps[0].clear()
diff --git a/grc/core/utils/backports/shlex.py b/grc/core/utils/backports/shlex.py
new file mode 100644
index 0000000000..6b620fa396
--- /dev/null
+++ b/grc/core/utils/backports/shlex.py
@@ -0,0 +1,47 @@
+# Copyright 2016 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+from __future__ import absolute_import
+
+import re
+import shlex
+
+# back port from python3
+
+_find_unsafe = re.compile(r'[^\w@%+=:,./-]').search
+
+
+def _shlex_quote(s):
+    """Return a shell-escaped version of the string *s*."""
+    if not s:
+        return "''"
+    if _find_unsafe(s) is None:
+        return s
+
+    # use single quotes, and put single quotes into double quotes
+    # the string $'b is then quoted as '$'"'"'b'
+    return "'" + s.replace("'", "'\"'\"'") + "'"
+
+
+if not hasattr(shlex, 'quote'):
+    quote = _shlex_quote
+else:
+    quote = shlex.quote
+
+split = shlex.split
author	Sebastian Koslowski <sebastian.koslowski@gmail.com>	2016-05-03 17:13:08 +0200
committer	Johnathan Corgan <johnathan@corganlabs.com>	2017-06-29 09:16:49 -0700
commit	7f7fa2f91467fdb2b11312be8562e7b51fdeb199 (patch)
tree	24268bac15b9920d2a15ddbb45eaf3b9b03718a1 /grc/core/utils/backports
parent	44cae388881821942e691a4d69a923bbd8d347db (diff)