Merge pull request #30616 from thaJeztah/fix-yakkety-install

install dirmngr if needed

hack/install.sh

@@ -462,11 +462,17 @@ do_install() {
 				( set -x; $sh_c 'sleep 3; apt-get install -y -q curl ca-certificates' )
 				curl='curl -sSL'
 			fi
-			if [ ! -e /usr/bin/gpg ]; then
+			if ! command -v gpg > /dev/null; then
 				apt_get_update
 				( set -x; $sh_c 'sleep 3; apt-get install -y -q gnupg2 || apt-get install -y -q gnupg' )
 			fi
 
+			# dirmngr is a separate package in ubuntu yakkety; see https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1634464
+			if ! command -v dirmngr > /dev/null; then
+				apt_get_update
+				( set -x; $sh_c 'sleep 3; apt-get install -y -q dirmngr' )
+			fi
+
 			(
 			set -x
 			echo "$docker_key" | apt-key add -