The Expect script for publishing package on npmjs.

yarn_publish.exp

#!/usr/bin/expect

set NPM_USER [lindex $argv 0]
set NPM_EMAIL [lindex $argv 1]
set NPM_PASS [lindex $argv 2]
set PROMPT "\[#%>\]"

spawn yarn publish
expect {
    "New version" {
        send "\n"
        exp_continue
    }
    "npm username" {
        send "${NPM_USER}\n"
        exp_continue
    }
    "npm email" {
        send "${NPM_EMAIL}\n"
        exp_continue
    }
    "npm password" {
        send "${NPM_PASS}\n"
    }
}

expect {
    -glob "${PROMPT}" {
        interact
        exit 0
    }
}