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/usr/src/linux-source-4.4.0/debian/tests/rebuild is in linux-source-4.4.0 4.4.0-51.72.

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#!/bin/sh

# If we are triggering for just linux or linux-meta we know we have
# just built the kernel and there is no point in repeating that
# build, it just wastes time.  (LP: #1498862)
build_needed=0
for trigger in ${ADT_TEST_TRIGGERS:-force}
do
	case "$trigger" in
	linux/*|linux-lts-*/*|linux-meta*/*)		;;
	*)						build_needed=1 ;;
	esac
done
if [ "$build_needed" -eq 0 ]; then
	echo "rebuild: short circuiting build for '${ADT_TEST_TRIGGERS}'"
	exit 0
fi

set -e
dpkg-buildpackage -rfakeroot -us -uc -b