update ota_from_target_files to handle mounting/unmounting for backupscript

backupscript should not be mounting/unmounting itself as it makes other
scripts have unexpected results (such as modelid_cfg, which expects /system
to be mounted)

instead have the ota script handle the mounting/unmounting

Change-Id: I94511f4147c624d975cb3ecbeaa8b0e98f63437c

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 9bb1d01..9ccfded 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -201,6 +201,12 @@ class EdifyGenerator(object):
           p.mount_point, mount_flags))
       self.mounts.add(p.mount_point)
 
+  def Unmount(self, mount_point):
+    """Unmount the partiiton with the given mount_point."""
+    if mount_point in self.mounts:
+      self.mounts.remove(mount_point)
+      self.script.append('unmount("%s");' % (mount_point,))
+
   def UnpackPackageDir(self, src, dst):
     """Unpack a given directory from the OTA package into the given
     destination directory."""