1 files changed, 68 insertions, 0 deletions
diff --git a/morphlib/plugins/branch_and_merge_plugin.py b/morphlib/plugins/branch_and_merge_plugin.py
new file mode 100644
index 00000000..ed49cba4
--- /dev/null
+++ b/morphlib/plugins/branch_and_merge_plugin.py
@@ -0,0 +1,68 @@
+# Copyright (C) 2012  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, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+import cliapp
+import os
+
+import morphlib
+
+
+class BranchAndMergePlugin(cliapp.Plugin):
+
+    def enable(self):
+        self.app.add_subcommand('init', self.init, arg_synopsis='[DIR]')
+        self.app.add_subcommand('minedir', self.minedir, arg_synopsis='')
+
+    def disable(self):
+        pass
+
+    @staticmethod
+    def deduce_mine_directory():
+        dirname = os.getcwd()
+        while dirname != '/':
+            dot_morph = os.path.join(dirname, '.morph')
+            if os.path.isdir(dot_morph):
+                return dirname
+            dirname = os.path.dirname(dirname)
+        return None
+
+    def init(self, args):
+        '''Initialize a mine.'''
+
+        if not args:
+            args = ['.']
+        elif len(args) > 1:
+            raise cliapp.AppException('init must get at most one argument')
+
+        dirname = args[0]
+
+        if os.path.exists(dirname):
+            if os.listdir(dirname) != []:
+                raise cliapp.AppException('can only initialize empty '
+                                          'directory: %s' % dirname)
+        else:
+            raise cliapp.AppException('can only initialize an existing '
+                                      'empty directory: %s' % dirname)
+
+        os.mkdir(os.path.join(dirname, '.morph'))
+
+    def minedir(self, args):
+        '''Find morph mine directory from current working directory.'''
+
+        dirname = self.deduce_mine_directory()
+        if dirname is None:
+            raise cliapp.AppException("Can't find the mine directory")
+        self.app.output.write('%s\n' % dirname)