feat: Worked with matt to create all the things

lib/config/setup_config_export.ts

@@ -0,0 +1,35 @@
+import { Config } from "./builder";
+import { DeepPartial, DependsOn, Effects, ExpectedExports } from "../types";
+import { ConfigSpec } from "../types/config-types";
+import { nullIfEmpty, okOf } from "../util";
+import { TypeFromProps } from "../util/propertiesMatcher";
+
+export function setupConfigExports<A extends ConfigSpec>(options: {
+  spec: Config<A>;
+  dependsOn: DependsOn;
+  write(effects: Effects, config: TypeFromProps<A>): Promise<void>;
+  read(effects: Effects): Promise<null | DeepPartial<TypeFromProps<A>>>;
+}) {
+  const validator = options.spec.validator();
+  return {
+    setConfig: (async ({ effects, input: config }) => {
+      if (!validator.test(config)) {
+        await effects.error(String(validator.errorMessage(config)));
+        return { error: "Set config type error for config" };
+      }
+      await options.write(effects, config);
+      return okOf({
+        signal: "SIGTERM",
+        "depends-on": options.dependsOn,
+      });
+    }) as ExpectedExports.setConfig,
+    getConfig: (async ({ effects }) => {
+      return okOf({
+        spec: options.spec.build(),
+        config: nullIfEmpty(await options.read(effects)),
+      });
+    }) as ExpectedExports.getConfig,
+  };
+}
+
+export default setupConfigExports;