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authorTom Scogland <scogland1@llnl.gov>2020-12-22 09:28:46 -0800
committerGitHub <noreply@github.com>2020-12-22 09:28:46 -0800
commitc1e4f3e1319f22604f755c46456c0ac910983cb7 (patch)
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Refactor flake8 handling and tool compatibility (#20376)
This PR does three related things to try to improve developer tooling quality of life: 1. Adds new options to `.flake8` so it applies the rules of both `.flake8` and `.flake_package` based on paths in the repository. 2. Adds a re-factoring of the `spack flake8` logic into a flake8 plugin so using flake8 directly, or through editor or language server integration, only reports errors that `spack flake8` would. 3. Allows star import of `spack.pkgkit` in packages, since this is now the thing that needs to be imported for completion to work correctly in package files, it's nice to be able to do that. I'm sorely tempted to sed over the whole repository and put `from spack.pkgkit import *` in every package, but at least being allowed to do it on a per-package basis helps. As an example of what the result of this is: ``` ~/Workspace/Projects/spack/spack develop* ⇣ ❯ flake8 --format=pylint ./var/spack/repos/builtin/packages/kripke/package.py ./var/spack/repos/builtin/packages/kripke/package.py:6: [F403] 'from spack.pkgkit import *' used; unable to detect undefined names ./var/spack/repos/builtin/packages/kripke/package.py:25: [E501] line too long (88 > 79 characters) ~/Workspace/Projects/spack/spack refactor-flake8* 1 ❯ flake8 --format=spack ./var/spack/repos/builtin/packages/kripke/package.py ~/Workspace/Projects/spack/spack refactor-flake8* ❯ flake8 ./var/spack/repos/builtin/packages/kripke/package.py ``` * qa/flake8: update .flake8, spack formatter plugin Adds: * Modern flake8 settings for per-path/glob error ignores, allows packages to use the same `.flake8` as the rest of spack * A spack formatter plugin to flake8 that implements the behavior of `spack flake8` for direct invocations. Makes integration with developer tooling nicer, linting with flake8 reports only errors that `spack flake8` would report. Using pyls and pyls-flake8, or any other non-format-dependent flake8 integration, now works with spack's rules. * qa/flake8: allow star import of spack.pkgkit To get working completion of directives and spack components it's necessary to import the contents of spack.pkgkit. At the moment doing this makes flake8 displeased. For now, allow spack.pkgkit and spack both, next step is to ban spack * and require spack.pkgkit *. * first cut at refactoring spack flake8 This version still copies all of the files to be checked as befire, and some other things that probably aren't necessary, but it relies on the spack formatter plugin to implement the ignore logic. * keep flake8 from rejecting itself * remove separate packages flake8 config * fix failures from too many files I ran into this in the PR converting pkgkit to std. The solution in that branch does not work in all cases as it turns out, and all the workarounds I tried to use generated configs to get a single invocation of flake8 with a filename optoion to work failed. It's an astonishingly frustrating config option. Regardless, this removes all temporary file creation from the command and relies on the plugin instead. To work around the huge number of files in spack and still allow the command to control what gets checked, it scans files in batches of 100. This is a completely arbitrary number but was chosen to be safely under common line-length limits. One side-effect of this is that every 100 files the command will produce output, rather than only at the end, which doesn't seem like a terrible thing.
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