Add MustGetEnv methods for use with numbers

os.go

@@ -3,6 +3,7 @@ package utils
 import (
 	"fmt"
 	"os"
+	"strconv"
 )
 
 // MustGetenv attempts to lookup and return the value associated with the specified environment variable identifier, panic'ing if no value is associated with that identifier
@@ -14,6 +15,48 @@ func MustGetenv(env string) string {
 	return value
 }
 
+// MustGetenvInt attempts to lookup and return the value associated with the specified environment variable identifier and cast it to an int,
+//panic'ing if no value is associated with that identifier or it cannot be cast
+func MustGetenvInt(env string) int {
+	value := MustGetenv(env)
+	intVal, err := strconv.Atoi(value)
+	if err != nil {
+		panic(fmt.Sprintf("Provided Environment variable for: %v can not be cast to int: %s\n", env, value))
+	}
+	return intVal
+}
+
+// MustGetenvIntNonZero attempts to lookup and return the value associated with the specified environment variable identifier and cast it to an int,
+//panic'ing if no value is associated with that identifier, if it cannot be cast, or if once cast equals zero
+func MustGetenvIntNonZero(env string) int {
+	value := MustGetenvInt(env)
+	if value == 0 {
+		panic(fmt.Sprintf("Provided Environment variable equals 0 when explicitly not allowed: %s\n", env))
+	}
+	return value
+}
+
+// MustGetenvFloat attempts to lookup and return the value associated with the specified environment variable identifier and cast it to a float,
+//panic'ing if no value is associated with that identifier or it cannot be cast
+func MustGetenvFloat(env string) float64 {
+	value := MustGetenv(env)
+	floatVal, err := strconv.ParseFloat(value, 64)
+	if err != nil {
+		panic(fmt.Sprintf("Provided Environment variable for: %v can not be cast to float: %s\n", env, value))
+	}
+	return floatVal
+}
+
+// MustGetenvFloatNonZero attempts to lookup and return the value associated with the specified environment variable identifier and cast it to a float,
+//panic'ing if no value is associated with that identifier, if it cannot be cast, or if once cast equals zero
+func MustGetenvFloatNonZero(env string) float64 {
+	value := MustGetenvFloat(env)
+	if value == 0 {
+		panic(fmt.Sprintf("Provided Environment variable equals 0 when explicitly not allowed: %s\n", env))
+	}
+	return value
+}
+
 // EnvOrDefault fetches an environment variable value, or if not set returns the fallback value
 func EnvOrDefault(key string, fallback string) string {
 	if val, ok := os.LookupEnv(key); ok {