commit ca8b2c699584cc498ff5f761fca9789c54ea1219
author Bowgo Tsai <bowgotsai@google.com> Wed Nov 15 18:06:48 2017 +0800
committer Bowgo Tsai <bowgotsai@google.com> Tue Mar 13 08:41:50 2018 +0800
tree 129afea6781f6d9b0e82c35c871f98027eb5a5ec
parent 23d45d1cc73ffb7a74bad4552c826fd497c83a97

Adding /odm support

Treble system-as-root GSI needs to work on devices with and without /odm
partition. This change creates the following symlinks for devices without
/odm partition:

  /odm/app ->/vendor/odm/app
  /odm/bin ->/vendor/odm/bin
  /odm/etc ->/vendor/odm/etc
  /odm/firmware ->/vendor/odm/firmware
  /odm/framework ->/vendor/odm/framework
  /odm/lib -> /vendor/odm/lib
  /odm/lib64 -> /vendor/odm/lib64
  /odm/overlay -> /vendor/odm/overlay
  /odm/priv-app -> /vendor/odm/priv-app

For devices with odm partition, /odm will be used as the mount point and
those symlinks will be hidden after mount.

Bug: 70678783
Test: boot a A/B device without /odm partition, checks those symlinks exist
Test: boot a A/B device with /odm partition, checks those symlinks don't exist
Change-Id: I4d960b52e2754f461188f3ab562c751f502046ea
(cherry picked from commit 00749affc4a9185953d7444c88f614c5b7694504)

rootdir/Android.mk

diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index feb100e..f488ed5 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -93,6 +93,23 @@
 else
   LOCAL_POST_INSTALL_CMD += ; ln -sf /system/product $(TARGET_ROOT_OUT)/product
 endif
+
+# For /odm partition.
+LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/odm
+# For Treble Generic System Image (GSI), system-as-root GSI needs to work on
+# both devices with and without /odm partition. Those symlinks are for devices
+# without /odm partition. For devices with /odm partition, mount odm.img under
+# /odm will hide those symlinks.
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/app $(TARGET_ROOT_OUT)/odm/app
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/bin $(TARGET_ROOT_OUT)/odm/bin
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/etc $(TARGET_ROOT_OUT)/odm/etc
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/firmware $(TARGET_ROOT_OUT)/odm/firmware
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/framework $(TARGET_ROOT_OUT)/odm/framework
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/lib $(TARGET_ROOT_OUT)/odm/lib
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/lib64 $(TARGET_ROOT_OUT)/odm/lib64
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/overlay $(TARGET_ROOT_OUT)/odm/overlay
+LOCAL_POST_INSTALL_CMD += ; ln -sf /vendor/odm/priv-app $(TARGET_ROOT_OUT)/odm/priv-app
+
 ifdef BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE
   LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/cache
 else