feat(config): expose util for standard cache directory per config

src/practices/config/best-practice/src/utils/config/getCacheDirectory.ts

@@ -0,0 +1,33 @@
+import type { DirectoryToPersistTo } from 'simple-on-disk-cache';
+import { isPresent } from 'type-fns';
+
+import { getConfig } from './getConfig';
+
+/**
+ * .what = gets the project's default s3 bucket, based on config
+ */
+export const getProjectBucket = async (): Promise<string> => {
+  const config = await getConfig();
+  const bucket = [
+    config.project,
+    config.aws.namespace,
+    config.environment.access,
+  ].join('-');
+  return bucket;
+};
+
+/**
+ * .what = gets the project's default cache directory, based on config
+ */
+export const getCacheDirectory = async (
+  input: {
+    scope?: string;
+  } = {},
+): Promise<DirectoryToPersistTo> => ({
+  s3: {
+    bucket: await getProjectBucket(),
+    prefix: ['purpose=cache', input.scope ? `scope=${input.scope}` : undefined]
+      .filter(isPresent)
+      .join('/'),
+  },
+});