V5 bringing RESP3, Sentinel and TypeMapping to node-redis

RESP3 Support
   - Some commands responses in RESP3 aren't stable yet and therefore return an "untyped" ReplyUnion.
 
Sentinel

TypeMapping

Correctly types Multi commands

Note: some API changes to be further documented in v4-to-v5.md

packages/client/lib/commands/EVAL.ts

@@ -1,7 +1,33 @@
-import { evalFirstKeyIndex, EvalOptions, pushEvalArguments } from './generic-transformers';
+import { RedisArgument, ReplyUnion, Command } from '../RESP/types';
 
-export const FIRST_KEY_INDEX = evalFirstKeyIndex;
-
-export function transformArguments(script: string, options?: EvalOptions): Array<string> {
-    return pushEvalArguments(['EVAL', script], options);
+export interface EvalOptions {
+  keys?: Array<RedisArgument>;
+  arguments?: Array<RedisArgument>;
 }
+
+export function transformEvalArguments(
+  command: RedisArgument,
+  script: RedisArgument,
+  options?: EvalOptions
+) {
+  const args = [command, script];
+
+  if (options?.keys) {
+    args.push(options.keys.length.toString(), ...options.keys);
+  } else {
+    args.push('0');
+  }
+
+  if (options?.arguments) {
+    args.push(...options.arguments);
+  }
+
+  return args;
+}
+
+export default {
+  FIRST_KEY_INDEX: (_, options?: EvalOptions) => options?.keys?.[0],
+  IS_READ_ONLY: false,
+  transformArguments: transformEvalArguments.bind(undefined, 'EVAL'),
+  transformReply: undefined as unknown as () => ReplyUnion
+} as const satisfies Command;