Error when using custom functions with `int` parameters or return types

[thatInfrastructureGuy]

I am new to jsonnet, so I might be missing something.

• Issue-1: Custom function only accepts float64, but not integer.
• Issue-2: Custom function returning integer throws error but returning float works. (Resolved on latest master. Only affects v0.20.0. )

---

input.jsonnet

local convertToInt = std.native('convertToInt');
// local replicas = convertToInt(3); -> (Issue-1)This does NOT Accept integer. But float64 works.
local replicas = convertToInt('3');
{
    replicas: replicas,
}

main.go

package main

import (
	"fmt"
	"log"
	"strconv"

	jsonnet "github.com/google/go-jsonnet"
	"github.com/google/go-jsonnet/ast"
	"gopkg.in/yaml.v3"
)

func main() {
	// Create a new Jsonnet VM
	vm := jsonnet.MakeVM()

	// Custom Golang function embed
	jsonToStringFunc := &jsonnet.NativeFunction{
		Name:   "convertToInt",
		Params: ast.Identifiers{"x"},
		Func:   convertToInt,
	}
	vm.NativeFunction(jsonToStringFunc)

	// Read the Jsonnet file
	jsonnetCode, err := vm.EvaluateFile("input.jsonnet")
	if err != nil {
		log.Fatal(err)
	}

	// Marshal the output to YAML
	var output interface{}
	err = yaml.Unmarshal([]byte(jsonnetCode), &output)
	if err != nil {
		log.Fatal(err)
	}

	// Print the YAML output
	yamlOutput, err := yaml.Marshal(output)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(string(yamlOutput))
}

func convertToInt(x []interface{}) (interface{}, error) {
	log.Printf("%v %T", x, x)
	y, ok := x[0].(string) 
	// y, ok := x[0].(int) // (Issue-1) int does not work, but float64 works, when x is a number.
	if !ok {
		return nil, fmt.Errorf("Error: Not a string")
	}
	log.Printf("%v %T", y, y)
	num, err := strconv.ParseFloat(y, 10) // works
	// num, err := strconv.Atoi(y) // (Issue-2)does not work if returning int
	if err != nil {
		return nil, err
	}
	return num, nil
}

[thatInfrastructureGuy]

Based on #223