# HG changeset patch
# User Franz Glasner <f.glasner@feldmann-mg.com>
# Date 1457439118 -3600
# Node ID e4c63b4f1568da4eac249f888b64cb48a4e76a95
# Parent  53ea2bc254e79ef0d3f56b8ffe52d4593358c3cb
Provide a yaml wrapper that import with all-unicode strings on Python2 but does not path the Loader globally

diff -r 53ea2bc254e7 -r e4c63b4f1568 mixconfig/yaml.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mixconfig/yaml.py	Tue Mar 08 13:11:58 2016 +0100
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+r"""Simple wrapper for yaml to support all-unicode strings when loading
+configuration files.
+
+"""
+
+from __future__ import division, print_function, absolute_import
+
+import yaml
+
+
+__all__ = ["safe_load", "safe_load_all", "load", "load_all"]
+
+
+class ConfigLoader(yaml.Loader):
+
+    """A YAML loader, which makes all !!str strings to Unicode.  Standard
+    PyYAML does this only in the non-ASCII case.
+
+    """
+
+    def construct_yaml_str(self, node):
+        return self.construct_scalar(node)
+
+
+ConfigLoader.add_constructor(
+    "tag:yaml.org,2002:str",
+    ConfigLoader.construct_yaml_str)
+
+
+class ConfigSafeLoader(yaml.SafeLoader):
+
+    """A safe YAML loader, which makes all !!str strings to Unicode.
+    Standard PyYAML does this only in the non-ASCII case.
+
+    """
+
+    def construct_yaml_str(self, node):
+        return self.construct_scalar(node)
+
+
+ConfigSafeLoader.add_constructor(
+    "tag:yaml.org,2002:str",
+    ConfigSafeLoader.construct_yaml_str)
+
+
+def load(stream, Loader=ConfigLoader):
+    return yaml.load(stream, Loader)
+
+
+def load_all(stream, Loader=ConfigLoader):
+    return yaml.load_all(stream, Loader)
+
+
+def safe_load(stream):
+    return yaml.load(stream, Loader=ConfigSafeLoader)
+
+
+def safe_load_all(stream):
+    return yaml.load_all(stream, Loader=ConfigSafeLoader)