add circuitpython code

1 files changed, 121 insertions, 0 deletions

diff --git a/circuitpython/lib/nrfutil/nordicsemi/utility/target_registry.py b/circuitpython/lib/nrfutil/nordicsemi/utility/target_registry.py
new file mode 100644
index 0000000..f87e006
--- /dev/null
+++ b/circuitpython/lib/nrfutil/nordicsemi/utility/target_registry.py
@@ -0,0 +1,121 @@
+# Copyright (c) 2015, Nordic Semiconductor
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# * Neither the name of Nordic Semiconductor ASA nor the names of its
+#   contributors may be used to endorse or promote products derived from
+#   this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import re
+import os
+import json
+from abc import ABCMeta, abstractmethod
+
+
+class TargetDatabase(object):
+    __metaclass__ = ABCMeta
+
+    @abstractmethod
+    def get_targets(self):
+        pass
+
+    @abstractmethod
+    def get_target(self, target_id):
+        pass
+
+    @abstractmethod
+    def refresh(self):
+        pass
+
+    @staticmethod
+    def find_target(targets, target_id):
+        for target in targets:
+            if target["id"] == target_id:
+                return target
+
+        return None
+
+
+class EnvTargetDatabase(TargetDatabase):
+    def __init__(self):
+        self.targets = None
+
+    def get_targets(self):
+        if self.targets is None:
+            self.targets = []
+
+            for key, value in os.environ.iteritems():
+                match = re.match("NORDICSEMI_TARGET_(?P<target>\d+)_(?P<key>[a-zA-Z_]+)", key)
+
+                if match:
+                    key_value = match.groupdict()
+                    if "key" in key_value and "target" in key_value:
+                        target_id = int(key_value["target"])
+
+                        target = self.find_target(self.targets, target_id)
+
+                        if target is None:
+                            target = {"id": int(target_id)}
+                            self.targets.append(target)
+
+                        target[key_value["key"].lower()] = value
+
+        return self.targets
+
+    def refresh(self):
+        self.targets = None
+
+    def get_target(self, target_id):
+        return self.find_target(self.get_targets(), target_id)
+
+
+class FileTargetDatabase(TargetDatabase):
+    def __init__(self, filename):
+        self.filename = filename
+        self.targets = None
+
+    def get_targets(self):
+        if not self.targets:
+            self.targets = json.load(open(self.filename, "r"))["targets"]
+
+        return self.targets
+
+    def get_target(self, target_id):
+        return self.find_target(self.get_targets(), target_id)
+
+    def refresh(self):
+        self.targets = None
+
+
+class TargetRegistry(object):
+    def __init__(self, target_db=EnvTargetDatabase()):
+        self.target_db = target_db
+
+    def find_one(self, target_id=None):
+        if target_id:
+            return self.target_db.get_target(target_id)
+        else:
+            return None
+
+    def get_all(self):
+        return self.target_db.get_targets()