enable tools to use test runners programmatically

[oli-obk]

No description provided.

[rust-highfive]

r? @aturon

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[est31]

@oli-obk the travis CI error seems relevant.

[aturon]

cc @rust-lang/libs, potential new public API surface.

[alexcrichton]

To be clear, this is an unstable library, so we're not committing to anything yet.

[oli-obk]

To be clear, this is an unstable library, so we're not committing to anything yet.

I'm fully aware of this, but I believe that experimentation with the interface can help contribute to a potential future interface that will be stabilized.

[sfackler]

What does this enable that use of the third party rustc-test crate doesn't?

[oli-obk]

What does this enable that use of the third party rustc-test crate doesn't?

I thought rustc-test is just a copy of the internal crate, but with major version bumps instead of a stable API. I can submit this patch to the rustc-test crate, but it will make it much harder for @SimonSapin to update it, if the crate diverges too much from the internals crate.

[SimonSapin]

For what it’s worth I haven’t updated rustc-test since I first made it. But yes, if you want to make major changes I’d suggest forking and making them in a separate crate. This specific PR seems small enough, though. I’d merge it in rustc-test, I don’t think it’s diverging enough to make merges difficult. I’ll also give you access to the repo and crates.io if you’re interested ;)

[oli-obk]

I’ll also give you access to the repo and crates.io if you’re interested ;)

sgtm

This specific PR seems small enough, though. I’d merge it in rustc-test

I opened a PR there, feel free to close this PR if the extra API is deemed excessive for a rustc crate.

[aturon]

Ping @brson, I suspect you have opinions and want to check in before merging.

[aturon]

I'm going to go ahead and r+. @brson, if you want to revisit later, we can always revert; it's unstable.

@bors: r+ rollup

[bors]

📌 Commit 80ac323 has been approved by aturon