// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016 Datadog, Inc.
package internal
import (
"net"
"strconv"
"strings"
"time"
"github.com/DataDog/dd-trace-go/v2/internal/env"
"github.com/DataDog/dd-trace-go/v2/internal/log"
)
// BoolEnv returns the parsed boolean value of an environment variable, or
// def otherwise.
func BoolEnv(key string, def bool) bool {
vv, ok := BoolEnvNoDefault(key)
if !ok {
return def
}
return vv
}
// BoolEnvNoDefault returns the parsed boolean value of an environment variable. The second returned bool signals if
// the value was set and was a correct boolean value.
func BoolEnvNoDefault(key string) (bool, bool) {
vv, ok := env.Lookup(key)
if !ok {
return false, false
}
v, err := strconv.ParseBool(vv)
if err != nil {
log.Warn("Non-boolean value for env var %s. Parse failed with error: %v", key, err.Error())
return false, false
}
return v, true
}
// IntEnv returns the parsed int value of an environment variable, or
// def otherwise.
func IntEnv(key string, def int) int {
vv, ok := env.Lookup(key)
if !ok {
return def
}
v, err := strconv.Atoi(vv)
if err != nil {
log.Warn("Non-integer value for env var %s, defaulting to %d. Parse failed with error: %v", key, def, err.Error())
return def
}
return v
}
// DurationEnv returns the parsed duration value of an environment variable, or
// def otherwise.
func DurationEnv(key string, def time.Duration) time.Duration {
vv, ok := env.Lookup(key)
if !ok {
return def
}
v, err := time.ParseDuration(vv)
if err != nil {
log.Warn("Non-duration value for env var %s, defaulting to %d. Parse failed with error: %v", key, def, err.Error())
return def
}
return v
}
// DurationEnvWithUnit returns the parsed duration value of an environment
// variable with the specified unit, or def otherwise.
func DurationEnvWithUnit(key string, unit string, def time.Duration) time.Duration {
vv, ok := env.Lookup(key)
if !ok {
return def
}
v, err := time.ParseDuration(vv + unit)
if err != nil {
log.Warn("Non-duration value for env var %s, defaulting to %d. Parse failed with error: %v", key, def, err.Error())
return def
}
return v
}
// IPEnv returns the valid IP value of an environment variable, or def otherwise.
func IPEnv(key string, def net.IP) net.IP {
vv, ok := env.Lookup(key)
if !ok {
return def
}
ip := net.ParseIP(vv)
if ip == nil {
log.Warn("Non-IP value for env var %s, defaulting to %s", key, def.String())
return def
}
return ip
}
// ForEachStringTag runs fn on every key val pair encountered in str.
// str may contain multiple key val pairs separated by either space
// or comma (but not a mixture of both), and each key val pair is separated by a delimiter.
func ForEachStringTag(str string, delimiter string, fn func(key string, val string)) {
sep := " "
if strings.Index(str, ",") > -1 {
// falling back to comma as separator
sep = ","
}
for _, tag := range strings.Split(str, sep) {
tag = strings.TrimSpace(tag)
if tag == "" {
continue
}
kv := strings.SplitN(tag, delimiter, 2)
key := strings.TrimSpace(kv[0])
if key == "" {
continue
}
var val string
if len(kv) == 2 {
val = strings.TrimSpace(kv[1])
}
fn(key, val)
}
}
// ParseTagString returns tags parsed from string as map
func ParseTagString(str string) map[string]string {
res := make(map[string]string)
ForEachStringTag(str, DDTagsDelimiter, func(key, val string) { res[key] = val })
return res
}
// FloatEnv returns the parsed float64 value of an environment variable,
// or def otherwise.
func FloatEnv(key string, def float64) float64 {
env, ok := env.Lookup(key)
if !ok {
return def
}
v, err := strconv.ParseFloat(env, 64)
if err != nil {
log.Warn("Non-float value for env var %s, defaulting to %f. Parse failed with error: %v", key, def, err.Error())
return def
}
return v
}
// BoolVal returns the parsed boolean value of string val, or def if not parseable
func BoolVal(val string, def bool) bool {
v, err := strconv.ParseBool(val)
if err != nil {
return def
}
return v
}
// ExternalEnvironment returns the value of the DD_EXTERNAL_ENV environment variable.
func ExternalEnvironment() string {
return env.Get("DD_EXTERNAL_ENV")
}
