linux - 向shell中递归扩展的变量添加前缀

Question

我有:

COMP_FILE+=docker-compose.con-etl.yml
COMP_FILE+=${PWD}/docker-compose.abc.yml
COMP_FILE+=${PWD}/docker-compose.cde.yml
COMP_FILE+=${PWD}/docker-compose.efg.yml
COMP_FILE+=${PWD}/docker-compose.hij.yml
COMP_FILE+=${PWD}/docker-compose.klm.yml
COMP_FILE+=${PWD}/docker-compose.nmo.yml
COMP_FILE+=${PWD}/docker-compose.pqr.yml

我需要在每个 docker-compose 之前添加 -f，例如结果应该是

-f docker-compose.con-etl.yml -f ${PWD}/datahub/docker-compose.abc.yml -f ${PWD}/datahub/docker-compose.cde.yml -f ${PWD}/datahub/docker-compose.efg.yml -f ${PWD}/datahub/docker-compose.hij.yml -f ${PWD}/datahub/docker-compose.klm.yml -f ${PWD}/datahub/docker-compose.nmo.yml -f ${PWD}/datahub/docker-compose.pqr.yml

我正在使用以下命令但无法获得所需的结果并获得

COMPOSE_FILE_ARGS=$(echo ${COMPOSE_FILE[@]/#/-f })

-f docker-compose.con-etl.yml${PWD}/datahub/docker-compose.abc.yml${PWD}/datahub/docker-compose.cde.yml${PWD}/datahub/docker-compose.efg.yml${PWD}/datahub/docker-compose.hij.yml${PWD}/datahub/docker-compose.klm.yml${PWD}/datahub/docker-compose.nmo.yml${PWD}/datahub/docker-compose.pqr.yml 

谁能帮帮我

Answer 1

您可以使用 cat 和 sed:

$ cat <<'end' | sed 's/=/=" -f /;s/$/"/' > script.sh
COMP_FILE=docker-compose.con-etl.yml
COMP_FILE+=${PWD}/docker-compose.abc.yml
COMP_FILE+=${PWD}/docker-compose.cde.yml
COMP_FILE+=${PWD}/docker-compose.efg.yml
COMP_FILE+=${PWD}/docker-compose.hij.yml
COMP_FILE+=${PWD}/docker-compose.klm.yml
COMP_FILE+=${PWD}/docker-compose.nmo.yml
COMP_FILE+=${PWD}/docker-compose.pqr.yml
end

然后source生成的script.sh得到:

$ . script.sh
$ echo $COMP_FILE
-f docker-compose.con-etl.yml -f /home/sergioro/docker-compose.abc.yml -f /home/sergioro/docker-compose.cde.yml -f /home/sergioro/docker-compose.efg.yml -f /home/sergioro/docker-compose.hij.yml -f /home/sergioro/docker-compose.klm.yml -f /home/sergioro/docker-compose.nmo.yml -f /home/sergioro/docker-compose.pqr.yml