Documentation is unclear about `cache-hit`'s value when the cache misses.

In some places it is stated that cache-hit evaluates to the empty string when if fails, notably here:

• https://github.com/actions/cache/blob/main/README.md?plain=1#L86-L88
• Also here: https://github.com/actions/cache/issues/1466#issuecomment-2400480945 (I found this issue reading the code, more specifically here: https://github.com/actions/cache/blob/1bd1e32a3bdc45362d1e726936510720a7c30a57/src/restoreImpl.ts#L54-L55

However this would appear to contradict this other statement:

• https://github.com/actions/cache/blob/main/README.md?plain=1#L129

I am assuming that the latter is a mistake and the former is the intended behavior (mainly based on the comments of the issue linked above). Is this assumption correct or am I missing something?

Is there any specific moment in the codebase where the empty string is returned? I was not able to find it. Do note that I am not too familiar with typescript. AFAIK, it would seem that the only places where cache-hit is set are:

• https://github.com/actions/cache/blob/1bd1e32a3bdc45362d1e726936510720a7c30a57/src/restoreImpl.ts#L18
  • Here it is set to false
• https://github.com/actions/cache/blob/1bd1e32a3bdc45362d1e726936510720a7c30a57/src/restoreImpl.ts#L79
  • And here, the isExactKeyMatch appears to return a boolean (based on its signature https://github.com/actions/cache/blob/main/src/utils/actionUtils.ts#L19).

Furthermore, are there any examples in how to handle the case when the cacheHit evaluates to the empty string? I could only find examples where that variable is tested for "true" or "false".

Thanks in advance!

Review the contradictory cache-hit statements in README.md, then inspect src/restoreImpl.ts and src/utils/actionUtils.ts to reconcile the documented behavior with the implementation. Check existing examples for handling the output values. Done means the README consistently explains the value on a cache miss and shows how to use it.