如何将文件的每一行作为选项传递给命令？

Question

我想编写一个脚本来读取文件并将每一行作为选项（或“选项参数”）传递给命令，如下所示：

command -o "1st line" -o "2nd line" ... -o "last line" args

这样做的最简单方法是什么？

Answer 1

# step 1, read the lines of the file into a shell array
mapfile -t lines < filename

# build up the command
cmd_ary=( command_name )
for elem in "${lines[@]}"; do
    cmd_ary+=( -o "$elem" )
done
cmd_ary+=( other args here )

# invoke the command
"${cmd_ary[@]}"