config

func ExpandEnv ¶

func ExpandEnv(input string) string

ExpandEnv replaces environment variable references in the input string with their values.

Supported formats:

• ${VAR} - Replaces with the value of VAR, or empty string if not set
• ${VAR:-default} - Replaces with the value of VAR, or "default" if VAR is not set or empty

Example:

input := "host: ${DB_HOST:-localhost}, port: ${DB_PORT:-5432}"
output := ExpandEnv(input)
// If DB_HOST=mydb.com and DB_PORT is not set:
// output = "host: mydb.com, port: 5432"

func ExpandEnvBytes ¶

func ExpandEnvBytes(input []byte) []byte

ExpandEnvBytes is a convenience wrapper around ExpandEnv for byte slices Useful for processing file contents before YAML/JSON unmarshaling

func ExtractEnvVars ¶

func ExtractEnvVars(input string) []string

ExtractEnvVars extracts all environment variable names referenced in the input This is useful for validation or documentation purposes

func ReplaceEnvVarsForDisplay ¶

func ReplaceEnvVarsForDisplay(input string) string

ReplaceEnvVarsForDisplay replaces environment variable values with masked strings for safe display in logs or error messages Example: "password: ${DB_PASSWORD}" -> "password: ***"

func ValidateEnvVars ¶

func ValidateEnvVars(input string) []string

ValidateEnvVars checks if all required environment variables are set Returns a list of missing variable names Variables with default values (${VAR:-default}) are not considered required