run-postinsts: for dpkg/opkg, do not rely on /etc/*-postinsts

Start opkg/dpkg as soon as the respective package managers status
file is present, no matter whether /etc/$pm-postinsts exists. This
decouples the implicit link between postinsts scripts in /etc and
the package manager: Currently the package manager is only started
if those scripts are present, although the package manager does not
use those scripts at all! Package managers install their own set of
postinst scripts.

The behavior when using rpm packages stays the same.

Note that using the package managers capability to execute postinst
scripts is preferred for good reasons: It makes sure that the
package managers database reflects that the packages have been
completely installed and configured.

This change allows to drop installation of the postinsts scripts
when package management is present. This will be done in a separate
change.

Note: Before commit 5aae19959a44 ("rootfs.py: Change logic to
unistall packages") rootfs.py did not install /etc/$pm-postinsts
when package management is installed! The change caused YOCTO #8235
which lead to the behavior change of run-postinsts in first place.

(From OE-Core rev: 1af421fcf05457223bf271f3951599b6c150cdff)

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts

@@ -6,7 +6,8 @@
 #
 
 # The following script will run all the scriptlets found in #SYSCONFDIR#/deb-postinsts,
-# #SYSCONFDIR#/ipk-postinsts or #SYSCONFDIR#/rpm-postinsts.
+# #SYSCONFDIR#/ipk-postinsts or #SYSCONFDIR#/rpm-postinsts or the package manager in
+# case available.
 
 # the order of this list is important, do not change!
 backend_list="rpm deb ipk"
@@ -14,27 +15,29 @@ backend_list="rpm deb ipk"
 pm_installed=false
 
 for pm in $backend_list; do
-	pi_dir="#SYSCONFDIR#/$pm-postinsts"
-
-	if [ ! -d $pi_dir ]; then
-		continue
-	fi
-
 	# found the package manager, it has postinsts
 	case $pm in
 		"deb")
 			if [ -s "#LOCALSTATEDIR#/lib/dpkg/status" ]; then
 				pm_installed=true
+				break
 			fi
 			;;
 
 		"ipk")
 			if [ -s "#LOCALSTATEDIR#/lib/opkg/status" ]; then
 				pm_installed=true
+				break
 			fi
 			;;
 	esac
-	break
+
+	pi_dir="#SYSCONFDIR#/$pm-postinsts"
+
+	# found postinsts directory
+	if [ -d $pi_dir ]; then
+		break
+	fi
 done
 
 remove_rcsd_link () {
@@ -43,7 +46,7 @@ remove_rcsd_link () {
 	fi
 }
 
-if ! [ -d $pi_dir ]; then
+if ! [ -d $pi_dir ] && ! $pm_installed; then
 	remove_rcsd_link
 	exit 0
 fi

meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts.service

@@ -3,7 +3,6 @@ Description=Run pending postinsts
 DefaultDependencies=no
 After=systemd-remount-fs.service systemd-tmpfiles-setup.service tmp.mount
 Before=sysinit.target
-ConditionPathExistsGlob=#SYSCONFDIR#/*-postinsts
 
 [Service]
 Type=oneshot