Implementing "<test_binary> --list --format json" for use by IDE test explorers / runners

[parthopdas]

Proposal

pre-RFC: 18308
Feature Name: Implementing "<test_binary> --list --format json"
Start Date: 2023-02-08
RFC PR: none yet (based however on discussions in #107307 2)
Rust Issue: rust-lang/rust#107307 3

<test_binary> --format pretty|terse|json|junit already exists. (See #49359)

As does <test_binary> --list.

This proposal put both together i.e. <test_binary> --list --format json for use by IDE test explorers / runners for superior user experience.

Until stabilization, a topic for an upcoming RFC, this will be available under -Zunstable-options.

Mentors or Reviewers

@bjorn3 @oli-obk @Manishearth

[rustbot]

This issue is not meant to be used for technical discussion. There is a Zulip stream for that. Use this issue to leave procedural comments, such as volunteering to review, indicating that you second the proposal (or third, etc), or raising a concern that you would like to be addressed.

cc @rust-lang/compiler @rust-lang/compiler-contributors

[oli-obk]

@rustbot second

[parthopdas]

@oli-obk i believe the 10 day comment period has been completed. if there weren't any concerns raised, please can you approve the PR rust-lang/rust#108148?

[apiraino]

@rustbot label -final-comment-period +major-change-accepted