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2022-09-07Make GHA tests parallel by using xdist (#32361)Tom Scogland1-28/+6
* Add two no-op jobs named "all-prechecks" and "all" These are a suggestion from @tgamblin, they are stable named markers we can use from gitlab and possibly for required checks to make CI more resilient to refactors changing the names of specific checks. * Enable parallel testing using xdist for unit testing in CI * Normalize tmp paths to deal with macos * add -u flag compatibility to spack python As of now, it is accepted and ignored. The usage with xdist, where it is invoked specifically by `python -u spack python` which is then passed `-u` by xdist is the entire reason for doing this. It should never be used without explicitly passing -u to the executing python interpreter. * use spack python in xdist to support python 2 When running on python2, spack has many import cycles unless started through main. To allow that, this uses `spack python` as the interpreter, leveraging the `-u` support so xdist doesn't error out when it unconditionally requests unbuffered binary IO. * Use shutil.move to account for tmpdir being in a separate filesystem sometimes
2022-09-02Reorder workflow execution in GHA (#32183)Tom Scogland1-0/+82
This patchset refactors our GitHub actions into a single top-level ci workflow that invokes a series of reusable actions. The main goal of this is to be able to easily control which tests run and in what order based on the success or failure of top-level prechecks. Our previous workflows ran in three sets: * nix tests: style and verification first, then linux and macos tests if successful * windows tests: style and verification first, then linux and macos tests if successful * bootstrap tests As a result, the bootstrap tests ran even if the style failed, and style and verification had to run on two different platforms despite running identical checks. I'm relatively sure that's because of the limitation on dependencies between steps in the jobs. Reusable workflows allow us to run the style, verification and now audit checks once, then depending on the results, and the files changed, run the appropriate nix, windows and bootstrap tests. While it saves only a few minutes by itself, this makes it easier to refactor checks to subset tests without having to replicate tests or other workflow components in the future. Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>