[OE-core] [PATCH] run-postinsts: Print message before running deferred postinst scripts

[Haris Okanovic]

Opkg can defer running postinst scripts to first boot, which can take
a while on some systems. The output of `opkg configure` (or whatever pm
is used) is redirected to a file when logging is enabled
(I.e. $POSTINST_LOGGING == 1), making the machine appear hung during
this process. This change simply prints a wait message on the console
to inform the user of this potentially long and silent operation so
that they do not mistakenly reboot their machine.

Why not simply `tee` the output instead?
Tee might be provided by BusyBox in some distros, which may need to run
update-alternatives in the very postinst scripts being executed by this
process. It's therefore not safe to assume Tee (or any other packaged
util) is available until the configure process finishes.

Signed-off-by: Haris Okanovic <haris.okanovic at ni.com>
---
 meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts b/meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts
index 04ba394..660ddc2 100755
--- a/meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts
+++ b/meta/recipes-devtools/run-postinsts/run-postinsts/run-postinsts
@@ -46,6 +46,9 @@ if [ -z "$pi_dir" ]; then
 	exit 0
 fi
 
+echo "Configuring packages on first boot...."
+echo " (This may take several minutes. Please do not power off the machine.)"
+
 [ -e #SYSCONFDIR#/default/postinst ] && . #SYSCONFDIR#/default/postinst
 
 if [ "$POSTINST_LOGGING" = "1" ]; then
-- 
2.10.1