GITC: Add repo start support.

Add repo start support for GITC checkouts. If the user is in
the GITC FS view, they can now run repo start to check out
the sources and create a new working branch.

When "repo start" is called on a GITC project, the revision
tag is set to an empty string and saved in a new tag:
old-revision. This tells the GITC filesystem to display the
local copy of the sources when being viewed. The local copy
is created by pulling the project sources and the new branch
is created based off the original project revision.

Updated main.py to setup each command's gitc_manifest when
appropriate.

Updated repo sync's logic to sync opened projects and
updating the GITC manifest file for the rest.

Change-Id: I7e4809d1c4fc43c69b26f2f1bebe45aab0cae628

1 files changed, 29 insertions, 15 deletions

diff --git a/subcmds/sync.py b/subcmds/sync.py
index ad0ecdf4..934aaa80 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -549,15 +549,6 @@ later is required to fix a server side protocol bug.
              cwd.split(gitc_utils.GITC_MANIFEST_DIR)[1]))
       sys.exit(1)
 
-    self._gitc_sync = False
-    if cwd.startswith(gitc_utils.GITC_FS_ROOT_DIR):
-      self._gitc_sync = True
-      self._client_name = cwd.split(gitc_utils.GITC_FS_ROOT_DIR)[1].split(
-          '/')[0]
-      self._client_dir = os.path.join(gitc_utils.GITC_MANIFEST_DIR,
-                                      self._client_name)
-      print('Updating GITC client: %s' % self._client_name)
-
     if opt.manifest_name:
       self.manifest.Override(opt.manifest_name)
 
@@ -677,12 +668,6 @@ later is required to fix a server side protocol bug.
     if opt.repo_upgraded:
       _PostRepoUpgrade(self.manifest, quiet=opt.quiet)
 
-    if self._gitc_sync:
-      gitc_utils.generate_gitc_manifest(self._client_dir, self.manifest)
-      print('GITC client successfully synced.')
-      return
-
-
     if not opt.local_only:
       mp.Sync_NetworkHalf(quiet=opt.quiet,
                           current_branch_only=opt.current_branch_only,
@@ -697,6 +682,35 @@ later is required to fix a server side protocol bug.
       self._ReloadManifest(manifest_name)
       if opt.jobs is None:
         self.jobs = self.manifest.default.sync_j
+
+    # TODO (sbasi) - Add support for manifest changes, aka projects
+    # have been added or deleted from the manifest.
+    if self.gitc_manifest:
+      gitc_manifest_projects = self.GetProjects(args,
+                                                manifest=self.gitc_manifest,
+                                                missing_ok=True)
+      gitc_projects = []
+      opened_projects = []
+      for project in gitc_manifest_projects:
+        if not project.old_revision:
+          gitc_projects.append(project)
+        else:
+          opened_projects.append(project)
+
+      if gitc_projects and not opt.local_only:
+        print('Updating GITC client: %s' % self.gitc_manifest.gitc_client_name)
+        gitc_utils.generate_gitc_manifest(self.gitc_manifest.gitc_client_dir,
+                                          self.gitc_manifest,
+                                          gitc_projects)
+        print('GITC client successfully synced.')
+
+      # The opened projects need to be synced as normal, therefore we
+      # generate a new args list to represent the opened projects.
+      args = []
+      for proj in opened_projects:
+        args.append(os.path.relpath(proj.worktree, cwd))
+      if not args:
+        return
     all_projects = self.GetProjects(args,
                                     missing_ok=True,
                                     submodules_ok=opt.fetch_submodules)