[kteam-tools][PATCH] git-build-kernel: add elapsed/load status as a keepalive

[Kamal Mostafa]

Long-running builds appear to hang, because when git-build-kernel emits no
output for a long time, TCP or ssh timeouts kick in and hang the underlying
git-ssh connection (the builds do not actually hang but the client-side
'git push' does).

To defeat such timeouts, keep the connection alive by printing an elapsed
time and load average display every 11 seconds.

Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 git-build-kernel/git-build-kernel | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/git-build-kernel/git-build-kernel b/git-build-kernel/git-build-kernel
index df01673..a62d00c 100755
--- a/git-build-kernel/git-build-kernel
+++ b/git-build-kernel/git-build-kernel
@@ -94,7 +94,8 @@ mkdir "$WORKDIR" || exit
 
 BUILDDIR="$WORKDIR/build"
 LOG="$WORKDIR/build.log"
-trap "rm -rf $BUILDDIR" 0
+touch "$WORKDIR/building"
+trap "rm -rf $WORKDIR/building $BUILDDIR" 0
 
 [ $do_source_pkg = 1 ] && {
     orig_tarball="linux_${VERSION%%-*}.orig.tar.gz"
@@ -116,6 +117,19 @@ echo "      version: $DISTRO ($VERSION)"
 echo "      targets: $TARGETS"
 echo "  starting build in $HOSTNAME:$WORKDIR ..."
 
+function show_elapsed
+{
+	while [ -f $WORKDIR/building ]
+	do
+	    loadavg="`uptime`"
+	    loadavg="load${loadavg##*load}"
+	    elapsed=`date --utc --date="@$SECONDS" +%H:%M:%S`
+	    echo -n -e "\r  elapsed: $elapsed   $loadavg"
+	    sleep 11
+	done
+}
+show_elapsed &
+
 (
 	set -e
 	echo "+++gbk++++ git-build-kernel"
@@ -146,6 +160,8 @@ XXEOFXX
 ) > $LOG 2>&1
 STATUS=$?
 
+rm -f "$WORKDIR/building"
+echo
 
 ### Output information about the build status and products
 
-- 
1.8.1.2