From fccd7917e62a3fbe3b0637ee630d09a9bdbf0678 Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Thu, 5 Jan 2023 18:10:44 +0530
Subject: feat: adds get env type func

---
 src/index.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/index.ts')

diff --git a/src/index.ts b/src/index.ts
index 87eea0b..f7e00b7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,6 +8,8 @@ export interface Print<_ extends any> extends EffectAtom { }
 export interface WriteFile<_Path extends string, _Content extends string> extends EffectAtom { }
 export interface ReadFile<_Path extends string> extends EffectAtom<string> { }
 
+export interface GetEnv<_Name extends string> extends EffectAtom<string> { }
+
 export interface Program<Effs extends Effect, ExitCode extends number = 0> {
   effects: Effs,
   exitCode: ExitCode,
@@ -23,12 +25,13 @@ export interface ChainIO<Eff extends EffectAtom, Fn extends Kind1> extends Effec
   chainTo: Fn
 }
 
-export interface PrintK extends Kind1<string> {
+export interface PrintK extends Kind1<string | undefined> {
   return: Print<this['input']>
 }
 
 export type main = Program<[
   [1, 2, 3] extends infer Res ? Print<Res> : never,
   Print<`wow: ${string} -> ${'helo'}`>,
+  ChainIO<GetEnv<"NODE_ENV">, PrintK>,
   ChainIO<ReadFile<"./default.nix">, PrintK>,
 ]>
-- 
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