forked from TrueCloudLab/lego
136 lines
3.2 KiB
Go
136 lines
3.2 KiB
Go
package env
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// Get environment variables
|
|
func Get(names ...string) (map[string]string, error) {
|
|
values := map[string]string{}
|
|
|
|
var missingEnvVars []string
|
|
for _, envVar := range names {
|
|
value := os.Getenv(envVar)
|
|
if value == "" {
|
|
missingEnvVars = append(missingEnvVars, envVar)
|
|
}
|
|
values[envVar] = value
|
|
}
|
|
|
|
if len(missingEnvVars) > 0 {
|
|
return nil, fmt.Errorf("some credentials information are missing: %s", strings.Join(missingEnvVars, ","))
|
|
}
|
|
|
|
return values, nil
|
|
}
|
|
|
|
// GetWithFallback Get environment variable values
|
|
// The first name in each group is use as key in the result map
|
|
//
|
|
// // LEGO_ONE="ONE"
|
|
// // LEGO_TWO="TWO"
|
|
// env.GetWithFallback([]string{"LEGO_ONE", "LEGO_TWO"})
|
|
// // => "LEGO_ONE" = "ONE"
|
|
//
|
|
// ----
|
|
//
|
|
// // LEGO_ONE=""
|
|
// // LEGO_TWO="TWO"
|
|
// env.GetWithFallback([]string{"LEGO_ONE", "LEGO_TWO"})
|
|
// // => "LEGO_ONE" = "TWO"
|
|
//
|
|
// ----
|
|
//
|
|
// // LEGO_ONE=""
|
|
// // LEGO_TWO=""
|
|
// env.GetWithFallback([]string{"LEGO_ONE", "LEGO_TWO"})
|
|
// // => error
|
|
//
|
|
func GetWithFallback(groups ...[]string) (map[string]string, error) {
|
|
values := map[string]string{}
|
|
|
|
var missingEnvVars []string
|
|
for _, names := range groups {
|
|
if len(names) == 0 {
|
|
return nil, errors.New("undefined environment variable names")
|
|
}
|
|
|
|
value, envVar := getOneWithFallback(names[0], names[1:]...)
|
|
if len(value) == 0 {
|
|
missingEnvVars = append(missingEnvVars, envVar)
|
|
continue
|
|
}
|
|
values[envVar] = value
|
|
}
|
|
|
|
if len(missingEnvVars) > 0 {
|
|
return nil, fmt.Errorf("some credentials information are missing: %s", strings.Join(missingEnvVars, ","))
|
|
}
|
|
|
|
return values, nil
|
|
}
|
|
|
|
func getOneWithFallback(main string, names ...string) (string, string) {
|
|
value := os.Getenv(main)
|
|
if len(value) > 0 {
|
|
return value, main
|
|
}
|
|
|
|
for _, name := range names {
|
|
value := os.Getenv(name)
|
|
if len(value) > 0 {
|
|
return value, main
|
|
}
|
|
}
|
|
|
|
return "", main
|
|
}
|
|
|
|
// GetOrDefaultInt returns the given environment variable value as an integer.
|
|
// Returns the default if the envvar cannot be coopered to an int, or is not found.
|
|
func GetOrDefaultInt(envVar string, defaultValue int) int {
|
|
v, err := strconv.Atoi(os.Getenv(envVar))
|
|
if err != nil {
|
|
return defaultValue
|
|
}
|
|
|
|
return v
|
|
}
|
|
|
|
// GetOrDefaultSecond returns the given environment variable value as an time.Duration (second).
|
|
// Returns the default if the envvar cannot be coopered to an int, or is not found.
|
|
func GetOrDefaultSecond(envVar string, defaultValue time.Duration) time.Duration {
|
|
v := GetOrDefaultInt(envVar, -1)
|
|
if v < 0 {
|
|
return defaultValue
|
|
}
|
|
|
|
return time.Duration(v) * time.Second
|
|
}
|
|
|
|
// GetOrDefaultString returns the given environment variable value as a string.
|
|
// Returns the default if the envvar cannot be find.
|
|
func GetOrDefaultString(envVar string, defaultValue string) string {
|
|
v := os.Getenv(envVar)
|
|
if len(v) == 0 {
|
|
return defaultValue
|
|
}
|
|
|
|
return v
|
|
}
|
|
|
|
// GetOrDefaultBool returns the given environment variable value as a boolean.
|
|
// Returns the default if the envvar cannot be coopered to a boolean, or is not found.
|
|
func GetOrDefaultBool(envVar string, defaultValue bool) bool {
|
|
v, err := strconv.ParseBool(os.Getenv(envVar))
|
|
if err != nil {
|
|
return defaultValue
|
|
}
|
|
|
|
return v
|
|
}
|