Fixes when the map of an either is expected to be possible undefined

1 files changed, 3 insertions, 4 deletions

diff --git a/u/process/env.ts b/u/process/env.ts
index c0d893c..470cb39 100644
--- a/u/process/env.ts
+++ b/u/process/env.ts
@@ -1,11 +1,10 @@
 import { Either, type IEither } from "@emprespresso/pengueno";
 
 export const getRequiredEnv = <V extends string>(name: V): IEither<Error, V> =>
-  Either.fromFailable<Error, V>(() => Deno.env.get(name) as V) // could throw when no permission.
+  Either.fromFailable<Error, V | undefined>(() => Deno.env.get(name) as V | undefined) // could throw when no permission.
     .flatMap(
-      (v) =>
-        (v && Either.right(v)) ||
-        Either.left(new Error(`environment variable "${name}" is required D:`)),
+      (v) => (v && Either.right(v)) ||
+        Either.left(new Error(`environment variable "${name}" is required D:`))
     );
 
 type ObjectFromList<T extends ReadonlyArray<string>, V = string> = {