Source a file from inside a logstash config pipeline?

Elastic Stack Logstash
1

Here's my logstash input config:

input {
        snmp {
                tables => [
                        { "name" => "interfaces" "columns" => [
                                ".1.3.6.1.2.1.31.1.1.1.1"
                        ] }
                ]
                hosts => [
                        { host => "udp:192.168.1.1/161" community => "public" },
                        { host => "udp:192.168.1.2/161" community => "public" }
                ]
        }
}

My list of hosts is dynamic, always updated... Can I source it from a file, something like that:

input {
        snmp {
                tables => [
                        { "name" => "interfaces" "columns" => [
                                ".1.3.6.1.2.1.31.1.1.1.1"
                        ] }
                ]
                hosts => [
                        source /path/to/host/file
                ]
        }
}

That would bring whatever is in the /path/to/host/file into the input config of logstash. If not, how can I dynamically generate my list?

2

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