Function defineGetDotenvConfig

defineGetDotenvConfig<
    Vars extends ProcessEnv,
    Env extends string = string,
    T extends GetDotenvConfig<Vars, Env> = GetDotenvConfig<Vars, Env>,
>(
    cfg: T,
): T
Define a strongly‑typed get‑dotenv configuration document for JS/TS authoring.

This helper is compile‑time only: it returns the input unchanged at runtime, but enables rich TypeScript inference for vars, envVars, and dynamic, and validates property names and value shapes as you author the config.
Type Parameters
- Vars extends ProcessEnv
  The string‑valued env map your project uses (for example, { APP_SETTING?: string }). Keys propagate to dynamic function arguments.
- Env extends string = string
  Allowed environment names used for envVars (defaults to string).
- T extends GetDotenvConfig<Vars, Env> = GetDotenvConfig<Vars, Env>
  The full config type being produced (defaults to GetDotenvConfig<Vars, Env>). This type parameter is rarely supplied explicitly.
Parameters
- cfg: T
  The configuration object literal.
Returns T
The same cfg value, with its type preserved for inference.
- Defined in src/core/GetDotenvOptions.ts:187