Introduce `--sim.exclude` flag for excluding suites / tests

[Rjected]

While --sim.limit is useful, we have been setting up some hive suites to run as github actions, and some test suites are not yet applicable, and should be excluded.

For example, snap in the devp2p simulator is not yet applicable because we do not support the snap subprotocol yet. The sim.limit does accept a regular expression, but the golang regular expression library does not support negative lookaheads / lookbehinds. To exclude a suite, we have to explicitly include every other suite. To exclude a test, we have to explicitly include every other test.

To exclude snap, we have to run --sim.limit for each suite we want to include in devp2p, which is luckily only discv4 and eth.

I think it makes sense to allow both --sim.limit and --sim.exclude for this use case, for example:

hive --clients reth --sim devp2p --sim.limit eth --sim.exclude /TestBlockHashAnnounce

Because reth does not process block hash announcements, this would exclude the right test, while allowing us to run all other tests in eth. Without sim.exclude, we would have to enumerate all tests we want to include using the sim.limit flag.

Does this make sense?

[spencer-tb]

Will take a look into adding this over the next couple days. I think should be simple enough: 1) Adding another flag. 2) Copying the regex logic for the flag with a not: !re.MatchString(...)). 3) Adding additional logic for the combination of both limit and exclude.

[Rjected]

Will take a look into adding this over the next couple days. I think should be simple enough:

1. Adding another flag.

2. Copying the regex logic for the flag with a not: `!re.MatchString(...))`.

3. Adding additional logic for the combination of both limit and exclude.

hey @spencer-tb, any progress on this?

[spencer-tb]

Sorry for the delay here, I started on this locally but never quite finalized everything. Some updates nonetheless!

I'm currently using this branch: spencer-tb/sim-exclude-flag

Usage and semantics so far are below:

--sim.limit "<suite_inclusion_pattern>/<test_inclusion_pattern>" --sim.omit "<suite_exclusion_pattern>/<test_exclusion_pattern>"

Note that exclusion is checked first. So if there is an overlap between inclusion and exclusion the test or suite will always be skipped.

I have the functionality working for some simulators, i.e ethereum/pyspec, ethereum/engine, however as the test limiting is different for devp2p and rpc-compat (simulators I am not familiar with) I'll need to update them for the exclusion to work.

Nonetheless the first feature should work for the devp2p simulator. That is if you want to only run the discv4 and eth suites you can use --sim.omit "snap|discv5/". Although that is equivalent to running --sim.limit "eth|discv4/" so there is not much point to this for devp2p as you mention.

[spencer-tb]

I will update you once I have finalized everything to work across all simulators. :)

@Rjected