1 files changed, 76 insertions, 0 deletions
diff --git a/contrail-agent/hooks/charmhelpers/fetch/bzrurl.py b/contrail-agent/hooks/charmhelpers/fetch/bzrurl.py
new file mode 100644
index 0000000..07cd029
--- /dev/null
+++ b/contrail-agent/hooks/charmhelpers/fetch/bzrurl.py
@@ -0,0 +1,76 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+from subprocess import check_call
+from charmhelpers.fetch import (
+    BaseFetchHandler,
+    UnhandledSource,
+    filter_installed_packages,
+    install,
+)
+from charmhelpers.core.host import mkdir
+
+
+if filter_installed_packages(['bzr']) != []:
+    install(['bzr'])
+    if filter_installed_packages(['bzr']) != []:
+        raise NotImplementedError('Unable to install bzr')
+
+
+class BzrUrlFetchHandler(BaseFetchHandler):
+    """Handler for bazaar branches via generic and lp URLs."""
+
+    def can_handle(self, source):
+        url_parts = self.parse_url(source)
+        if url_parts.scheme not in ('bzr+ssh', 'lp', ''):
+            return False
+        elif not url_parts.scheme:
+            return os.path.exists(os.path.join(source, '.bzr'))
+        else:
+            return True
+
+    def branch(self, source, dest, revno=None):
+        if not self.can_handle(source):
+            raise UnhandledSource("Cannot handle {}".format(source))
+        cmd_opts = []
+        if revno:
+            cmd_opts += ['-r', str(revno)]
+        if os.path.exists(dest):
+            cmd = ['bzr', 'pull']
+            cmd += cmd_opts
+            cmd += ['--overwrite', '-d', dest, source]
+        else:
+            cmd = ['bzr', 'branch']
+            cmd += cmd_opts
+            cmd += [source, dest]
+        check_call(cmd)
+
+    def install(self, source, dest=None, revno=None):
+        url_parts = self.parse_url(source)
+        branch_name = url_parts.path.strip("/").split("/")[-1]
+        if dest:
+            dest_dir = os.path.join(dest, branch_name)
+        else:
+            dest_dir = os.path.join(os.environ.get('CHARM_DIR'), "fetched",
+                                    branch_name)
+
+        if dest and not os.path.exists(dest):
+            mkdir(dest, perms=0o755)
+
+        try:
+            self.branch(source, dest_dir, revno)
+        except OSError as e:
+            raise UnhandledSource(e.strerror)
+        return dest_dir