feat(resolve-check-config): add ability to use a config file to adjust jobs (#255)

resolve-check-config/src/tier-map.ts

@@ -0,0 +1,39 @@
+/**
+ * A category of services that can be selected for a job. Mirrors the
+ * `Tier` concept in `supported-version` but adds the `web` tier so the
+ * smoke-test and integration jobs can opt the nginx + php-fpm pair in
+ * or out as a unit. Intentionally narrower than supported-version's
+ * tier set: this file only names tiers that the resolve-check-config
+ * schema lets callers toggle.
+ */
+export type Tier = 'db' | 'search' | 'queue' | 'cache' | 'web';
+
+/**
+ * Expansion of each tier to the concrete service names that may
+ * appear in a supported-version matrix entry's `services` map.
+ * Filtering a matrix entry's services for a tier list means keeping
+ * the keys that union to the values of the selected tiers here.
+ */
+export const TIER_TO_SERVICES: Record<Tier, readonly string[]> = {
+  db: ['mysql'],
+  search: ['opensearch', 'elasticsearch'],
+  queue: ['rabbitmq'],
+  cache: ['valkey', 'redis'],
+  web: ['nginx', 'php-fpm'],
+};
+
+export const isTier = (value: unknown): value is Tier =>
+  typeof value === 'string' && value in TIER_TO_SERVICES;
+
+/**
+ * Returns the flat set of concrete service names for a list of tiers.
+ * Used to filter a matrix entry's `services` map down to only the
+ * containers a particular job actually needs.
+ */
+export const servicesForTiers = (tiers: readonly Tier[]): Set<string> => {
+  const result = new Set<string>();
+  for (const tier of tiers) {
+    for (const name of TIER_TO_SERVICES[tier]) result.add(name);
+  }
+  return result;
+}