Usage of gofn:

Gofn executes the passed -fn code. Therefore a go-binary will be
created and stored. With a chance of 1 to 30 a cleaning-routine
deletes the oldest gofn-binaries, if there are more than 200.
Set the GOFN environment variable to change the gofn binary directory.
Set GOFN_MAX to specify how many binaries should be kept.

  -debug
        Print generated code to stdout and exit
  -fn string
        Mandatory function-body without function declaration.
        Body is inserted into the function: fn(arr []string)
  -imports string
        Space-separated list of imports
  -list
        List all existing gofn binaries
  -name string
        Mandatory function name

#!/usr/bin/env bash

cmd='
s := strings.Join(arr, " ")
fmt.Println(s)
'

gofn -name="hello_bash" -imports="fmt strings" -fn="$cmd" "Hello" "World"

#!/usr/bin/env fish

set cmd '
rand.Seed(time.Now().UnixNano())
rollTheDice := func() int {
     return rand.Intn(6) +1
}
for i:=0; i<20; i++ {
    fmt.Println(rollTheDice())
}
'

gofn -name="hello_fish" -imports="fmt math/rand time" -fn="$cmd"