Origin for each line in node_exporter.service from check-in ebafd89015:

b8c8da525b 2019-10-20    1: # vim:ft=make:
b8c8da525b 2019-10-20    2: 
8f80b79392 2019-10-20    3: DAEMON_node_exporter_COMMAND?=/usr/local/bin/node_exporter --web.listen-address=${DAEMON_node_exporter_LISTEN_ADDRESS} --collector.textfile.directory=${DAEMON_node_exporter_TEXTFILE_DIR}
b8c8da525b 2019-10-20    4: DAEMON_node_exporter_ENABLE?=no
b8c8da525b 2019-10-20    5: DAEMON_node_exporter_LISTEN_ADDRESS?=:9100
b8c8da525b 2019-10-20    6: DAEMON_node_exporter_TEXTFILE_DIR?=/var/tmp/node_exporter
b8c8da525b 2019-10-20    7: DAEMON_node_exporter_USER?=nobody
b8c8da525b 2019-10-20    8: DAEMON_node_exporter_GROUP?=nobody
b8c8da525b 2019-10-20    9: 
ebafd89015 2019-10-21   10: node_exporter: _service
716b0393df 2019-10-21   11: .export DAEMON_$@_ENABLE
716b0393df 2019-10-21   12: 	test -z "$${DAEMON_$@_ENABLE}" || \
b8c8da525b 2019-10-20   13: 	install -d -o ${DAEMON_node_exporter_USER} -g ${DAEMON_node_exporter_GROUP} -m1755 ${DAEMON_node_exporter_TEXTFILE_DIR}