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ci: run MSRV checks with minimal dep versions #670

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merged 10 commits into from
Jun 17, 2022
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@hawkw hawkw commented Jun 17, 2022

In many cases, new releases of a dependency can break compatibility with
Tower's minimum supported Rust version (MSRV). It shouldn't be necessary
for Tower to bump its MSRV when a dependency does, as users on older
Rust versions should be able to depend on older versions of that crate.
Instead, we should probably just run our MSRV checks with minimal
dependency versions.

This branch changes Tower's CI jobs to do that.

Signed-off-by: Eliza Weisman eliza@buoyant.io

In many cases, new releases of a dependency can break compatibility with
Tower's minimum supported Rust version (MSRV). It shouldn't be necessary
for Tower to bump its MSRV when a dependency does, as users on older
Rust versions should be able to depend on older versions of that crate.
Instead, we should probably just run our MSRV checks with minimal
dependency versions.

This branch changes Tower's CI jobs to do that.

Signed-off-by: Eliza Weisman <eliza@buoyant.io>
@hawkw hawkw requested review from LucioFranco and olix0r June 17, 2022 17:21
Signed-off-by: Eliza Weisman <eliza@buoyant.io>
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hawkw commented Jun 17, 2022

Oh. Nevermind. We can't do this, because -Z minimal-versions is an unstable cargo feature and requires a nightly toolchain (https://github.com/taiki-e/cargo-minimal-versions#prerequisites). Hmm...

Signed-off-by: Eliza Weisman <eliza@buoyant.io>
hawkw added 3 commits June 17, 2022 10:42
this fixes the minimal version build

Signed-off-by: Eliza Weisman <eliza@buoyant.io>
Signed-off-by: Eliza Weisman <eliza@buoyant.io>
Signed-off-by: Eliza Weisman <eliza@buoyant.io>
hawkw added 3 commits June 17, 2022 11:03
Signed-off-by: Eliza Weisman <eliza@buoyant.io>
i hate this but whatever lol

Signed-off-by: Eliza Weisman <eliza@buoyant.io>
@hawkw hawkw merged commit 22b6fc7 into master Jun 17, 2022
@hawkw hawkw deleted the eliza/msrv-min-versions branch June 17, 2022 18:23
hawkw added a commit that referenced this pull request Jun 17, 2022
In many cases, new releases of a dependency can break compatibility with
Tower's minimum supported Rust version (MSRV). It shouldn't be necessary
for Tower to bump its MSRV when a dependency does, as users on older
Rust versions should be able to depend on older versions of that crate.
Instead, we should probably just run our MSRV checks with minimal
dependency versions.

This branch changes Tower's CI jobs to do that. It was also necessary to 
make some changes to the `Cargo.toml` to actually fix the build with
minimal dependency versions.

Signed-off-by: Eliza Weisman <eliza@buoyant.io>
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3 participants