Toolkit: Is it possible to use cache service URL as a HTTP cache?

[vlsi]

Describe the enhancement

It would be nice if caching could be used as an HTTP service. Modern build systems like Gradle, Bazel, Pants can use a remote cache to avoid building the same tasks across different builds.

The current @actions/cache allows to cache files, however, there's no way to fetch data on demand, and it is hard to make incremental updates to the cache.

Can the HTTP cache service be exposed to the build scripts? For instance, read-only for pull-requests, and read-write for branch-based builds.

Additional information

See https://cirrus-ci.org/guide/writing-tasks/#http-cache

[fkorotkov]

I wrote an action to start a proxy server that has the compatible API. See https://github.com/cirruslabs/http-cache-action

[vlsi]

There's Gradle-tailored action as well: https://github.com/burrunan/gradle-cache-action :)

[vlsi]

@fkorotkov , FYI: https://github.com/open-telemetry/opentelemetry-java-instrumentation/issues/1205#issue-701759426

Error: commitCache failed: {"$id":"1","innerException":null,"message":"Request was blocked due to exceeding usage of resource 'Count' in namespace ''.","typeName":"Microsoft.TeamFoundation.Framework.Server.RequestBlockedException, Microsoft.TeamFoundation.Framework.Server","typeKey":"RequestBlockedException","errorCode":0,"eventId":3000}
    at /home/runner/work/_actions/burrunan/gradle-cache-action/v1.4/dist/cache-action-entrypoint.js:15662:11
    at Generator.throw (<anonymous>)
    at rejected (/home/runner/work/_actions/burrunan/gradle-cache-action/v1.4/dist/cache-action-entrypoint.js:15615:27)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)

[fkorotkov]

Will be great to get some official comments about concurrent usage of the API. 🤔