feat: add local file-based eligibility cache with --refresh flag - #20
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Cache eligibility API responses in ~/.grant/cache/ to skip the API roundtrip on subsequent runs. Default TTL is 4 hours, configurable via cache_ttl in ~/.grant/config.yaml. - internal/cache: generic Store with Get/Set/Invalidate and TTL expiry - internal/cache: CachedEligibilityLister decorator for both cloud and groups eligibility interfaces with verbose logging on hit/miss/refresh - --refresh flag on grant and grant env to bypass cache - cache_ttl config option with ParseCacheTTL helper - groups model types added as prerequisite for cache interface
aaearon
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Summary
~/.grant/cache/) that stores API responses as JSON files with a 4-hour default TTL, avoiding redundant API roundtrips on subsequent runs--refreshflag ongrantandgrant envto bypass the cache and fetch fresh eligibility datacache_ttlconfig option in~/.grant/config.yamlfor customizing the TTL (Go duration syntax, e.g.2h,30m)Details
cache.StorewithGet[T]/Set[T]functions and injectable clock for testingCachedEligibilityListerdecorator wraps both cloud and groups eligibility listers, implementing the existing interfaces transparentlybuildCachedLister()factory incmd/root.goshared by root and env commandseligibility_azure.json,eligibility_aws.json)Test plan
cache.Store(hit, miss, expiry, invalidation, corrupt data)CachedEligibilityLister(cache hit skips API, cache miss calls API and writes, refresh bypasses read, groups eligibility caching)config.ParseCacheTTL(default, custom, invalid)--refreshon root and env commandsmake testpasses