From bdb5271de3fafb9fbec3fde0e8e95e5b061ab0f5 Mon Sep 17 00:00:00 2001
From: Simran Basi <sbasi@google.com>
Date: Mon, 10 Aug 2015 13:23:23 -0700
Subject: GITC: Add repo sync support.

Add repo sync support for GITC checkouts. If the user is in the
GITC client directory they can still pull the sources as normal
if they pass in the --force-gitc argument. Otherwise the user
should call repo sync in the GITC view to update the user's
remote view. (This works because .repo in the GITC view will
link to .repo in the client config directory.)

Part of the support for this change is the refactoring of GITC
related code into gitc_utils.py.

Change-Id: I2636aaa50b450b6f091309db8dd0e8f4dbdad579
---
 gitc_utils.py | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 gitc_utils.py

(limited to 'gitc_utils.py')

diff --git a/gitc_utils.py b/gitc_utils.py
new file mode 100644
index 00000000..bf79bd28
--- /dev/null
+++ b/gitc_utils.py
@@ -0,0 +1,69 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# 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.
+
+from __future__ import print_function
+import os
+import shutil
+
+import git_command
+import git_config
+
+
+# TODO (sbasi) - Remove this constant and fetch manifest dir from /gitc/.config
+GITC_MANIFEST_DIR = '/usr/local/google/gitc/'
+GITC_FS_ROOT_DIR = '/gitc/manifest-rw/'
+NUM_BATCH_RETRIEVE_REVISIONID = 300
+
+def _set_project_revisions(projects):
+  """Sets the revisionExpr for a list of projects.
+
+  Because of the limit of open file descriptors allowed, length of projects
+  should not be overly large. Recommend calling this function multiple times
+  with each call not exceeding NUM_BATCH_RETRIEVE_REVISIONID projects.
+
+  @param projects: List of project objects to set the revionExpr for.
+  """
+  # Retrieve the commit id for each project based off of it's current
+  # revisionExpr and it is not already a commit id.
+  project_gitcmds = [(
+      project, git_command.GitCommand(None,
+                                      ['ls-remote',
+                                       project.remote.url,
+                                       project.revisionExpr],
+                                      capture_stdout=True, cwd='/tmp'))
+      for project in projects if not git_config.IsId(project.revisionExpr)]
+  for proj, gitcmd in project_gitcmds:
+    if gitcmd.Wait():
+      print('FATAL: Failed to retrieve revisionExpr for %s' % project)
+      sys.exit(1)
+    proj.revisionExpr = gitcmd.stdout.split('\t')[0]
+
+def generate_gitc_manifest(client_dir, manifest):
+  """Generate a manifest for shafsd to use for this GITC client.
+
+  @param client_dir: GITC client directory to install the .manifest file in.
+  @param manifest: XmlManifest object representing the repo manifest.
+  """
+  print('Generating GITC Manifest by fetching revision SHAs for each '
+        'project.')
+  project_gitcmd_dict = {}
+  index = 0
+  while index < len(manifest.projects):
+    _set_project_revisions(
+        manifest.projects[index:(index+NUM_BATCH_RETRIEVE_REVISIONID)])
+    index += NUM_BATCH_RETRIEVE_REVISIONID
+  # Save the manifest.
+  with open(os.path.join(client_dir, '.manifest'), 'w') as f:
+    manifest.Save(f)
-- 
cgit v1.2.3-54-g00ecf