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package env
import (
"math"
"os"
"strconv"
"strings"
"github.com/argoproj-labs/argocd-image-updater/registry-scanner/pkg/log"
)
// Package env provides some utility functions to interact with the environment
// of the process.
// GetBoolVal retrieves a boolean value from given environment envVar.
// Returns default value if envVar is not set.
func GetBoolVal(envVar string, defaultValue bool) bool {
if val := os.Getenv(envVar); val != "" {
if strings.ToLower(val) == "true" {
return true
} else if strings.ToLower(val) == "false" {
return false
}
}
return defaultValue
}
// GetStringVal retrieves a string value from given environment envVar
// Returns default value if envVar is not set.
func GetStringVal(envVar string, defaultValue string) string {
if val := os.Getenv(envVar); val != "" {
return val
} else {
return defaultValue
}
}
// Helper function to parse a number from an environment variable. Returns a
// default if env is not set, is not parseable to a number, exceeds max (if
// max is greater than 0) or is less than min.
//
// nolint:unparam
func ParseNumFromEnv(env string, defaultValue, min, max int) int {
str := os.Getenv(env)
if str == "" {
return defaultValue
}
num, err := strconv.ParseInt(str, 10, 0)
if err != nil {
log.Warnf("Could not parse '%s' as a number from environment %s", str, env)
return defaultValue
}
if num > math.MaxInt || num < math.MinInt {
log.Warnf("Value in %s is %d is outside of the min and max %d allowed values. Using default %d", env, num, min, defaultValue)
return defaultValue
}
if int(num) < min {
log.Warnf("Value in %s is %d, which is less than minimum %d allowed", env, num, min)
return defaultValue
}
if int(num) > max {
log.Warnf("Value in %s is %d, which is greater than maximum %d allowed", env, num, max)
return defaultValue
}
return int(num)
}
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