rootfs: Ensure run-postinsts is not uninstalled for read-only-rootfs-delayed-postinsts

This patch ensures that pkg_postinst_ontarget task is executed for read only rootfs when
read-only-rootfs-delayed-postinsts is set as IMAGE_FEATURES. The issue was that run-postinsts
could be uninstalled at the end of rootfs construction and that shouldn't happen for
the delayed usecase.

In addition to the fix, a test in meta/lib/oeqa/selftest/cases/overlayfs.py testing
the fix has been implemented.

(From OE-Core rev: 60f587475dda99eaa07848880058b69286b8900e)

Signed-off-by: Gassner, Tobias.ext <tobias.gassner.ext@karlstorz.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 44 insertions, 1 deletions

diff --git a/meta/lib/oe/rootfs.py b/meta/lib/oe/rootfs.py
index 8cd48f9450..5abce4ad7d 100644
--- a/meta/lib/oe/rootfs.py
+++ b/meta/lib/oe/rootfs.py
@@ -269,7 +269,11 @@ class Rootfs(object, metaclass=ABCMeta):
                 self.pm.remove(["run-postinsts"])
 
         image_rorfs = bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs",
+                                        True, False, self.d) and \
+                      not bb.utils.contains("IMAGE_FEATURES",
+                                        "read-only-rootfs-delayed-postinsts",
                                         True, False, self.d)
+
         image_rorfs_force = self.d.getVar('FORCE_RO_REMOVE')
 
         if image_rorfs or image_rorfs_force == "1":
diff --git a/meta/lib/oeqa/selftest/cases/overlayfs.py b/meta/lib/oeqa/selftest/cases/overlayfs.py
index e31063567b..580fbdcb9c 100644
--- a/meta/lib/oeqa/selftest/cases/overlayfs.py
+++ b/meta/lib/oeqa/selftest/cases/overlayfs.py
@@ -5,7 +5,7 @@
 #
 
 from oeqa.selftest.case import OESelftestTestCase
-from oeqa.utils.commands import bitbake, runqemu
+from oeqa.utils.commands import bitbake, runqemu, get_bb_vars
 from oeqa.core.decorator import OETestTag
 from oeqa.core.decorator.data import skipIfNotMachine
 
@@ -466,6 +466,45 @@ IMAGE_INSTALL:append = " overlayfs-user"
             line = getline_qemu(output, "Read-only file system")
             self.assertTrue(line, msg=output)
 
+    @skipIfNotMachine("qemux86-64", "tests are qemux86-64 specific currently")
+    def test_postinst_on_target_for_read_only_rootfs(self):
+        """
+        Summary:  The purpose of this test case is to verify that post-installation
+                  on target scripts are executed even if using read-only rootfs when
+                  read-only-rootfs-delayed-postinsts is set
+        Expected: The test files are created on first boot
+        """
+
+        import oe.path
+
+        vars = get_bb_vars(("IMAGE_ROOTFS", "sysconfdir"), "core-image-minimal")
+        sysconfdir = vars["sysconfdir"]
+        self.assertIsNotNone(sysconfdir)
+        # Need to use oe.path here as sysconfdir starts with /
+        targettestdir = os.path.join(sysconfdir, "postinst-test")
+
+        config = self.get_working_config()
+
+        args = {
+            'OVERLAYFS_INIT_OPTION': "",
+            'OVERLAYFS_ETC_USE_ORIG_INIT_NAME': 1,
+            'OVERLAYFS_ROOTFS_TYPE': "ext4",
+            'OVERLAYFS_ETC_CREATE_MOUNT_DIRS': 1
+        }
+
+        # read-only-rootfs is already set in get_working_config()
+        config += 'EXTRA_IMAGE_FEATURES += "read-only-rootfs-delayed-postinsts"\n'
+        config += 'CORE_IMAGE_EXTRA_INSTALL = "postinst-delayed-b"\n'
+
+        self.write_config(config.format(**args))
+
+        res = bitbake('core-image-minimal')
+
+        with runqemu('core-image-minimal', image_fstype='wic') as qemu:
+            for filename in ("rootfs", "delayed-a", "delayed-b"):
+                status, output = qemu.run_serial("test -f %s && echo found" % os.path.join(targettestdir, filename))
+                self.assertIn("found", output, "%s was not present on boot" % filename)
+
     def get_working_config(self):
         return """
 # Use systemd as init manager