56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
 
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// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package api
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import (
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"os"
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"strings"
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)
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const (
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// legacyEnvPrefix is the environment variable prefix used by upstream
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// HashiCorp Boundary. It is still honored as a fallback.
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legacyEnvPrefix = "BOUNDARY_"
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// envPrefix is the preferred environment variable prefix for Threshold.
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envPrefix = "THRESHOLD_"
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)
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// PreferredEnvName returns the Threshold (THRESHOLD_*) form of an environment
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// variable name. Names that do not use the legacy BOUNDARY_ prefix are
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// returned unchanged.
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func PreferredEnvName(name string) string {
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if strings.HasPrefix(name, legacyEnvPrefix) {
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return envPrefix + strings.TrimPrefix(name, legacyEnvPrefix)
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}
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return name
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}
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// LegacyEnvName returns the legacy (BOUNDARY_*) form of an environment
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// variable name. Names that do not use the THRESHOLD_ prefix are returned
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// unchanged.
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func LegacyEnvName(name string) string {
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if strings.HasPrefix(name, envPrefix) {
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return legacyEnvPrefix + strings.TrimPrefix(name, envPrefix)
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}
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return name
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}
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// LookupEnv looks up an environment variable, preferring the THRESHOLD_*
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// name and falling back to the legacy BOUNDARY_* name. The name may be given
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// with either prefix; names with neither prefix are looked up as-is.
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func LookupEnv(name string) (string, bool) {
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if v, ok := os.LookupEnv(PreferredEnvName(LegacyEnvName(name))); ok {
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return v, true
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}
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return os.LookupEnv(LegacyEnvName(name))
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}
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// Getenv is like os.Getenv but follows the LookupEnv precedence. A set but
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// empty THRESHOLD_* variable falls through to the legacy BOUNDARY_* variable.
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func Getenv(name string) string {
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if v := os.Getenv(PreferredEnvName(LegacyEnvName(name))); v != "" {
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return v
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}
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return os.Getenv(LegacyEnvName(name))
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}
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