1 files changed, 58 insertions, 0 deletions
diff --git a/src/buildstream/_options/optionbool.py b/src/buildstream/_options/optionbool.py
new file mode 100644
index 000000000..867de22df
--- /dev/null
+++ b/src/buildstream/_options/optionbool.py
@@ -0,0 +1,58 @@
+#
+#  Copyright (C) 2017 Codethink Limited
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public
+#  License as published by the Free Software Foundation; either
+#  version 2 of the License, or (at your option) any later version.
+#
+#  This library 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
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public
+#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
+#
+#  Authors:
+#        Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
+
+from .. import _yaml
+from .._exceptions import LoadError, LoadErrorReason
+from .option import Option, OPTION_SYMBOLS
+
+
+# OptionBool
+#
+# A boolean project option
+#
+class OptionBool(Option):
+
+    OPTION_TYPE = 'bool'
+
+    def load(self, node):
+
+        super(OptionBool, self).load(node)
+        _yaml.node_validate(node, OPTION_SYMBOLS + ['default'])
+        self.value = _yaml.node_get(node, bool, 'default')
+
+    def load_value(self, node, *, transform=None):
+        if transform:
+            self.set_value(transform(_yaml.node_get(node, str, self.name)))
+        else:
+            self.value = _yaml.node_get(node, bool, self.name)
+
+    def set_value(self, value):
+        if value in ('True', 'true'):
+            self.value = True
+        elif value in ('False', 'false'):
+            self.value = False
+        else:
+            raise LoadError(LoadErrorReason.INVALID_DATA,
+                            "Invalid value for boolean option {}: {}".format(self.name, value))
+
+    def get_value(self):
+        if self.value:
+            return "1"
+        else:
+            return "0"