Question / Guidance: MinIO Implementation

首先，将提议的 MSBuildCacheMinioStoragePlugin.cs 与 AzureBlobStorage 实现进行比较，并检查 BuildXL 的 ICacheClient、IContentStore、IContentSession、IMetadataStore、IPublishingStore 及相关接口。确定实际需要哪些 MinIO 缓存组件，然后记录已确定的实现范围和测试方案。

After reading more about MSBuildCache and BuildXL I wanted to ask a few questions to see if implementing MinIO as a cache is feasible and at what level it should be implemented.

• Is the expectation of this repository to hide the internals of BuildXL? The reason I ask is BuildXL seems to be on GitHub but has a decent amount of internal vs public stuff going on. Not clear to me if extending functionality from that repository is recommended.
• If it is recommended to extend functionality from that repository any guidance on a Minio approach? This is what I've currently got in my notes so far:
  • Use AzureBlobStorage as an example.
  • Careful of classes that seem generic but have Azure specific functionality. May not be able to re-use as much as initially hoped.
  • Create MSBuildCacheMinioStoragePlugin.cs
  • MSBuildCacheMinioStoragePlugin.cs will implement CreateCacheClientAsync that returns a CasCacheClient to satisfy ICacheClient requirement.
  • The CasCacheClient expects a local cache and remote cache. The local cache is already handled. The remote cache must be a Minio compatible remote cache implementation.
  • To create a Minio compatible remote cache client we must implement:
    • MinioContentStore to satisfy IContentStore requirement.
    • MinioContentSession to satisfy IContentSession requirement.
    • MinioContentStore and MinioContentSession will be injected into OneLevelCache and "just work" given those new Minio classes are implemented correctly.
    • MinioMetadataStore to satisfy IMetadataStore requirement.
    • MinioMetadataStore will be injected into MetadataStoreMemoizationDatabase. DatabaseMemoizationStore will "just work" given new Minio classes are implemented correctly.
    • IPublishingStore and IPublishingSession looks like they need to be implemented but ran out of time during investigation. Look later to determine requirements.
    • IBlobCacheTopology does not seem required but might want to mimic flow anyways to keep things the same.
  • Overall very involved. Overhead of learning BuildXL is very high. Testing / debuggability also seems difficult.

Does everything around BuildXL and having to extend that sound correct if we want a Minio / S3 implementation? Am I overstating or understating how involved this is?

Any guidance would be appreciated!