[OE-core] [PATCH V2 1/4] image.bbclass: add postinst_enable_logging

[Qi.Chen at windriver.com]

From: Chen Qi <Qi.Chen at windriver.com>

Add a function postinst_enable_logging, so that when 'debug-tweaks'
is in IMAGE_FEATURES, we create /etc/default/postinst config file,
which is sourced by run-postinst scripts to determine whether to log
or not.

[YOCTO #4262]

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 meta/classes/image.bbclass |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 2b42e12..5c02732 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -175,6 +175,8 @@ MACHINE_POSTPROCESS_COMMAND ?= ""
 ROOTFS_POSTPROCESS_COMMAND_prepend = "run_intercept_scriptlets; "
 # Allow dropbear/openssh to accept logins from accounts with an empty password string if debug-tweaks is enabled
 ROOTFS_POSTPROCESS_COMMAND += '${@base_contains("IMAGE_FEATURES", "debug-tweaks", "ssh_allow_empty_password; ", "",d)}'
+# Enable postinst logging if debug-tweaks is enabled
+ROOTFS_POSTPROCESS_COMMAND += '${@base_contains("IMAGE_FEATURES", "debug-tweaks", "postinst_enable_logging; ", "",d)}'
 
 # some default locales
 IMAGE_LINGUAS ?= "de-de fr-fr en-gb"
@@ -484,6 +486,11 @@ ssh_allow_empty_password () {
 	fi
 }
 
+# Enable postinst logging if debug-tweaks is enabled
+postinst_enable_logging () {
+	echo "POSTINST_LOGGING=ENABLED" >> ${IMAGE_ROOTFS}/etc/default/postinst
+}
+
 # Turn any symbolic /sbin/init link into a file
 remove_init_link () {
 	if [ -h ${IMAGE_ROOTFS}/sbin/init ]; then
-- 
1.7.9.5