Separate out Morphs class and new Pots class

The aim is to have all .morph-specific code in one place

1 files changed, 93 insertions, 0 deletions

diff --git a/ybd/pots.py b/ybd/pots.py
new file mode 100644
index 0000000..6964d1c
--- /dev/null
+++ b/ybd/pots.py
@@ -0,0 +1,93 @@
+# Copyright (C) 2016  Codethink Limited
+#
+# This program 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; version 2 of the License.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# =*= License: GPL-2 =*=
+
+import os
+import yaml
+from app import chdir, config, log, exit
+from defaults import Defaults
+from definitions import Morphs
+import repos
+
+
+# copied from http://stackoverflow.com/questions/21016220
+class ExplicitDumper(yaml.SafeDumper):
+    """
+    A dumper that will never emit aliases.
+    """
+
+    def ignore_aliases(self, data):
+        return True
+
+
+class Pots(object):
+
+    def __init__(self, directory='.'):
+        self._trees = {}
+        self._data = Morphs()._data
+        self.defaults = Defaults()
+        self._save_pots('./definitions.yml')
+
+    def get(self, dn):
+        ''' Return a definition from the dictionary.
+
+        If `dn` is a string, return the definition with that key.
+        If `dn` is a dict, return the definition with key equal to the 'path'
+        value in the given dict. '''
+
+        if type(dn) is str:
+            return self._data.get(dn)
+
+        return self._data.get(dn.get('path', dn.keys()[0]))
+
+    def _save_pots(self, filename):
+        with open(filename, 'w') as f:
+            f.write(yaml.dump(self._data, default_flow_style=False,
+                              Dumper=ExplicitDumper))
+        log('RESULT', 'Saved yaml definitions at', filename)
+
+    def _load_pots(self, filename):
+        with open(filename) as f:
+            text = f.read()
+        return yaml.safe_load(text)
+
+    def _set_trees(self):
+        '''Use the tree values from .trees file, to save time'''
+        with open('.trees') as f:
+            text = f.read()
+        self._trees = yaml.safe_load(text)
+        for path in self._data:
+            try:
+                dn = self._data[path]
+                if dn.get('ref') and self._trees.get(path):
+                    if dn['ref'] == self._trees.get(path)[0]:
+                        dn['tree'] = self._trees.get(path)[1]
+            except:
+                log('DEFINITIONS', 'WARNING: problem with .trees file')
+                pass
+
+    def save_trees(self):
+        '''Creates the .trees file for the current working directory
+
+        .trees contains lookups of git trees from git refs for all definitions
+        '''
+        for name in self._data:
+            if self._data[name].get('tree') is not None:
+                self._trees[name] = [self._data[name]['ref'],
+                                     self._data[name]['tree'],
+                                     self._data[name].get('cache')]
+
+        with open(os.path.join(os.getcwd(), '.trees'), 'w') as f:
+            f.write(yaml.safe_dump(self._trees, default_flow_style=False))