Introduce a RepositoryOverridesExperimentLoader

[hisener]

Description of the feature request:

I was wondering whether it makes sense to read the .intellij-experiments file from the project directory. That way, we don't need to ask developers to turn certain experiments on/off. For example, optimize_building_jars needs to be disabled in a repo where Bazel 5 is used. See also #5515 (comment).

The implementation would be similar to

intellij/common/experiments/src/com/google/idea/common/experiments/UserOverridesExperimentLoader.java

Lines 21 to 24 in 09a186b

	/** Reads experiments override values from the user home directory. */
	final class UserOverridesExperimentLoader extends FileExperimentLoader {
	private static final String USER_EXPERIMENT_OVERRIDES_FILE =
	SystemProperties.getUserHome() + File.separator + ".intellij-experiments";

Which category does this issue belong to?

Intellij, GoLand, CLion, PyCharm

What underlying problem are you trying to solve with this feature?

When an experiment doesn't work in a repository, all developers working in the repo need to add/update their ~/.intellij-experiments file.

What operating system, Intellij IDE and programming languages are you using? Please provide specific versions.

N/A

Have you found anything relevant by searching the web?

No response

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

No response

[tpasternak]

Currently I'm assigning p4, but in case more users would like that, we will consider raising the priority.

[tpasternak]

Btw there's yet another way to disable experiments - you can do it by setting vm options like here

intellij/java/BUILD

Line 241 in ba01cc1

"jvm_flags": ["-Dblaze.experiment.query.sync.new.artifact.management=1"],

[hisener]

🤔 Is there a way to set IntelliJ IDEA VM options per repo?

[tpasternak]

probably not

[tpasternak]

wait, but I'm not sure if it's that easy, experiments also affect the import process

[tpasternak]

We didn't have such requests in the past. Experiments are not in general considered as "project stettings". This like that should be manipulated via the project view files. Adding this would end up in providing yet another config file apart from what we have. So I'm rather skeptical about this feature.