Symlinks in action outputs are not yet supported by --experimental_remote_download_outputs=minimal

[glukasiknuro]

Description of the problem / feature request:

While building with --remote_download_minimal getting a warning:

WARNING: Reading from Remote Cache:
java.io.IOException: Symlinks in action outputs are not yet supported by --experimental_remote_download_outputs=minimal
 at com.google.devtools.build.lib.remote.RemoteCache.downloadMinimal(RemoteCache.java:568)
 at com.google.devtools.build.lib.remote.RemoteSpawnCache.lookup(RemoteSpawnCache.java:192)
 at com.google.devtools.build.lib.exec.AbstractSpawnStrategy.exec(AbstractSpawnStrategy.java:135)
 at com.google.devtools.build.lib.exec.AbstractSpawnStrategy.exec(AbstractSpawnStrategy.java:102)
 at com.google.devtools.build.lib.actions.SpawnStrategy.beginExecution(SpawnStrategy.java:47)
 at com.google.devtools.build.lib.exec.SpawnStrategyResolver.beginExecution(SpawnStrategyResolver.java:65)
 at com.google.devtools.build.lib.analysis.actions.SpawnAction.beginExecution(SpawnAction.java:331)
 at com.google.devtools.build.lib.actions.Action.execute(Action.java:127)
 at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor$4.execute(SkyframeActionExecutor.java:859)
 at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor$ActionRunner.continueAction(SkyframeActionExecutor.java:1019)
 at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor$ActionRunner.run(SkyframeActionExecutor.java:978)
 at com.google.devtools.build.lib.skyframe.ActionExecutionState.runStateMachine(ActionExecutionState.java:129)
 at com.google.devtools.build.lib.skyframe.ActionExecutionState.getResultOrDependOnFuture(ActionExecutionState.java:81)
 at com.google.devtools.build.lib.skyframe.SkyframeActionExecutor.executeAction(SkyframeActionExecutor.java:469)
 at com.google.devtools.build.lib.skyframe.ActionExecutionFunction.checkCacheAndExecuteIfNeeded(ActionExecutionFunction.java:845)
 at com.google.devtools.build.lib.skyframe.ActionExecutionFunction.compute(ActionExecutionFunction.java:314)
 at com.google.devtools.build.skyframe.AbstractParallelEvaluator$Evaluate.run(AbstractParallelEvaluator.java:438)
 at com.google.devtools.build.lib.concurrent.AbstractQueueVisitor$WrappedRunnable.run(AbstractQueueVisitor.java:398)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
 at java.base/java.lang.Thread.run(Unknown Source)

What operating system are you running Bazel on?

Linux

What's the output of bazel info release?

Custom build on top of 3.7

Have you found anything relevant by searching the web?

https://github.com/bazelbuild/bazel/issues/6862

Any other information, logs, or outputs that you want to share?

I assume this warning is benign - in the sense the build still proceeds, although some additional actions need to be executed.

• Are there plans to support symlinks for remote download minimal, or is this intrinsic issue with builds without bytes?

[coeuvre]

Are there plans to support symlinks for remote download minimal

Yes, I will work on this once #12665 is implemented.