X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/9bd4134f3138448eb92af7031d994b2cec7d08ad..a8f68f57fed6cd6bf585b10abd3cc84d37c2fd05:/docs/contributing/gauging_changes.md diff --git a/docs/contributing/gauging_changes.md b/docs/contributing/gauging_changes.md index 9b38fe1..8562a83 100644 --- a/docs/contributing/gauging_changes.md +++ b/docs/contributing/gauging_changes.md @@ -7,53 +7,12 @@ It's recommended you evaluate the quantifiable changes your _Black_ formatting modification causes before submitting a PR. Think about if the change seems disruptive enough to cause frustration to projects that are already "black formatted". -## black-primer - -`black-primer` is a tool built for CI (and humans) to have _Black_ `--check` a number of -Git accessible projects in parallel. (configured in `primer.json`) _(A PR will be -accepted to add Mercurial support.)_ - -### Run flow - -- Ensure we have a `black` + `git` in PATH -- Load projects from `primer.json` -- Run projects in parallel with `--worker` workers (defaults to CPU count / 2) - - Checkout projects - - Run black and record result - - Clean up repository checkout _(can optionally be disabled via `--keep`)_ -- Display results summary to screen -- Default to cleaning up `--work-dir` (which defaults to tempfile schemantics) -- Return - - 0 for successful run - - \< 0 for environment / internal error - - \> 0 for each project with an error - -### Speed up runs 🏎 - -If you're running locally yourself to test black on lots of code try: - -- Using `-k` / `--keep` + `-w` / `--work-dir` so you don't have to re-checkout the repo - each run - -### CLI arguments - -```{program-output} black-primer --help - -``` - ## diff-shades -diff-shades is a tool similar to black-primer, it also runs _Black_ across a list of Git -cloneable OSS projects recording the results. The intention is to eventually fully -replace black-primer with diff-shades as it's much more feature complete and supports -our needs better. - -The main highlight feature of diff-shades is being able to compare two revisions of -_Black_. This is incredibly useful as it allows us to see what exact changes will occur, -say merging a certain PR. Black-primer's results would usually be filled with changes -caused by pre-existing code in Black drowning out the (new) changes we want to see. It -operates similarly to black-primer but crucially it saves the results as a JSON file -which allows for the rich comparison features alluded to above. +diff-shades is a tool that runs _Black_ across a list of open-source projects recording +the results. The main highlight feature of diff-shades is being able to compare two +revisions of _Black_. This is incredibly useful as it allows us to see what exact +changes will occur, say merging a certain PR. For more information, please see the [diff-shades documentation][diff-shades]. @@ -61,35 +20,39 @@ For more information, please see the [diff-shades documentation][diff-shades]. diff-shades is also the tool behind the "diff-shades results comparing ..." / "diff-shades reports zero changes ..." comments on PRs. The project has a GitHub Actions -workflow which runs diff-shades twice against two revisions of _Black_ according to -these rules: +workflow that analyzes and compares two revisions of _Black_ according to these rules: | | Baseline revision | Target revision | | --------------------- | ----------------------- | ---------------------------- | | On PRs | latest commit on `main` | PR commit with `main` merged | | On pushes (main only) | latest PyPI version | the pushed commit | -Once finished, a PR comment will be posted embedding a summary of the changes and links -to further information. If there's a pre-existing diff-shades comment, it'll be updated -instead the next time the workflow is triggered on the same PR. +For pushes to main, there's only one analysis job named `preview-changes` where the +preview style is used for all projects. -The workflow uploads 3-4 artifacts upon completion: the two generated analyses (they -have the .json file extension), `diff.html`, and `.pr-comment.json` if triggered by a -PR. The last one is downloaded by the `diff-shades-comment` workflow and shouldn't be -downloaded locally. `diff.html` comes in handy for push-based or manually triggered -runs. And the analyses exist just in case you want to do further analysis using the -collected data locally. +For PRs they get one more analysis job: `assert-no-changes`. It's similar to +`preview-changes` but runs with the stable code style. It will fail if changes were +made. This makes sure code won't be reformatted again and again within the same year in +accordance to Black's stability policy. -Note that the workflow will only fail intentionally if while analyzing a file failed to +Additionally for PRs, a PR comment will be posted embedding a summary of the preview +changes and links to further information. If there's a pre-existing diff-shades comment, +it'll be updated instead the next time the workflow is triggered on the same PR. + +```{note} +The `preview-changes` job will only fail intentionally if while analyzing a file failed to format. Otherwise a failure indicates a bug in the workflow. +``` -```{tip} -Maintainers with write access or higher can trigger the workflow manually from the -Actions tab using the `workflow_dispatch` event. Simply select "diff-shades" -from the workflows list on the left, press "Run workflow", and fill in which revisions -and command line arguments to use. +The workflow uploads several artifacts upon completion: -Once finished, check the logs or download the artifacts for local use. -``` +- The raw analyses (.json) +- HTML diffs (.html) +- `.pr-comment.json` (if triggered by a PR) + +The last one is downloaded by the `diff-shades-comment` workflow and shouldn't be +downloaded locally. The HTML diffs come in handy for push-based where there's no PR to +post a comment. And the analyses exist just in case you want to do further analysis +using the collected data locally. [diff-shades]: https://github.com/ichard26/diff-shades#readme