From: Cooper Lees Date: Mon, 18 May 2020 14:25:40 +0000 (-0700) Subject: Add `black-primer` docs (#1427) X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/b0f3798aab36ff4ee20ae68b1b4cd73acd5fc54c?ds=sidebyside Add `black-primer` docs (#1427) * Add `black-primer` docs - Document the idea, CLI args, config and a example run for `black-primer` in README.md - Add to docs/index.rst * Add @hugovk suggestions - Thanks. --- diff --git a/README.md b/README.md index 3baffd3..8f539e2 100644 --- a/README.md +++ b/README.md @@ -33,9 +33,10 @@ Try it out now using the [Black Playground](https://black.now.sh). Watch the _Contents:_ **[Installation and usage](#installation-and-usage)** | **[Code style](#the-black-code-style)** | **[Pragmatism](#pragmatism)** | **[pyproject.toml](#pyprojecttoml)** | **[Editor integration](#editor-integration)** | -**[blackd](#blackd)** | **[Version control integration](#version-control-integration)** -| **[Ignoring unmodified files](#ignoring-unmodified-files)** | **[Used by](#used-by)** -| **[Testimonials](#testimonials)** | **[Show your style](#show-your-style)** | +**[blackd](#blackd)** | **[black-primer](#black-primer)** | +**[Version control integration](#version-control-integration)** | +**[Ignoring unmodified files](#ignoring-unmodified-files)** | **[Used by](#used-by)** | +**[Testimonials](#testimonials)** | **[Show your style](#show-your-style)** | **[Contributing](#contributing-to-black)** | **[Change Log](#change-log)** | **[Authors](#authors)** @@ -52,7 +53,7 @@ run but you can reformat Python 2 code with it, too. To get started right away with sensible defaults: -``` +```sh black {source_file_or_directory} ``` @@ -1068,7 +1069,7 @@ Options: There is no official blackd client tool (yet!). You can test that blackd is working using `curl`: -``` +```sh blackd --bind-port 9090 & # or let blackd choose a port curl -s -XPOST "localhost:9090" -d "print('valid')" ``` @@ -1117,6 +1118,124 @@ Apart from the above, `blackd` can produce the following response codes: The response headers include a `X-Black-Version` header containing the version of _Black_. +## black-primer + +`black-primer` is a tool built for CI (and huumans) to have _Black_ `--check` a number +of (configured in `primer.json`) Git accessible projects in parallel. _(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 + +```text +Usage: black-primer [OPTIONS] + + primer - prime projects for blackening ... 🏴 + +Options: + -c, --config PATH JSON config file path [default: /Users/cooper/repos/ + black/src/black_primer/primer.json] + + --debug Turn on debug logging [default: False] + -k, --keep Keep workdir + repos post run [default: False] + -L, --long-checkouts Pull big projects to test [default: False] + -R, --rebase Rebase project if already checked out [default: + False] + + -w, --workdir PATH Directory Path for repo checkouts [default: /var/fol + ders/tc/hbwxh76j1hn6gqjd2n2sjn4j9k1glp/T/primer.20200 + 517125229] + + -W, --workers INTEGER Number of parallel worker coroutines [default: 69] + -h, --help Show this message and exit. +``` + +### primer config file + +The config is `JSON` format. It's main element is the `"projects"` dictionary. Below +explains each parameter: + +```json +{ + "projects": { + "00_Example": { + "cli_arguments": "List of extra CLI arguments to pass Black for this project", + "expect_formatting_changes": "Boolean to indicate that the version of Black is expected to cause changes", + "git_clone_url": "URL you would pass `git clone` to check out this repo", + "long_checkout": "Boolean to have repo skipped by defauult unless `--long-checkouts` is specified", + "py_versions": "List of major Python versions to run this project with - all will do as you'd expect - run on ALL versions" + }, + "aioexabgp": { + "cli_arguments": [], + "expect_formatting_changes": true, + "git_clone_url": "https://github.com/cooperlees/aioexabgp.git", + "long_checkout": false, + "py_versions": ["all", "3.8"] // "all" ignores all other versions + } + } +} +``` + +### Example run + +```console +cooper-mbp:black cooper$ ~/venvs/b/bin/black-primer +[2020-05-17 13:06:40,830] INFO: 4 projects to run black over (lib.py:270) +[2020-05-17 13:06:44,215] INFO: Analyzing results (lib.py:285) +-- primer results 📊 -- + +3 / 4 succeeded (75.0%) ✅ +1 / 4 FAILED (25.0%) 💩 + - 0 projects Disabled by config + - 0 projects skipped due to Python Version + - 0 skipped due to long checkout + +Failed Projects: + +## flake8-bugbear: + - Returned 1 + - stdout: +--- tests/b303_b304.py 2020-05-17 20:04:09.991227 +0000 ++++ tests/b303_b304.py 2020-05-17 20:06:42.753851 +0000 +@@ -26,11 +26,11 @@ + maxint = 5 # this is okay + # the following shouldn't crash + (a, b, c) = list(range(3)) + # it's different than this + a, b, c = list(range(3)) +- a, b, c, = list(range(3)) ++ a, b, c = list(range(3)) + # and different than this + (a, b), c = list(range(3)) + a, *b, c = [1, 2, 3, 4, 5] + b[1:3] = [0, 0] + +would reformat tests/b303_b304.py +Oh no! 💥 💔 💥 +1 file would be reformatted, 22 files would be left unchanged. +``` + ## Version control integration Use [pre-commit](https://pre-commit.com/). Once you @@ -1170,10 +1289,10 @@ then write the above files to `.cache/black//`. The following notable open-source projects trust _Black_ with enforcing a consistent code style: pytest, tox, Pyramid, Django Channels, Hypothesis, attrs, SQLAlchemy, -Poetry, PyPA applications (Warehouse, Pipenv, virtualenv), pandas, Pillow, every Datadog -Agent Integration, Home Assistant. +Poetry, PyPA applications (Warehouse, Bandersnatch, Pipenv, virtualenv), pandas, Pillow, +every Datadog Agent Integration, Home Assistant. -The following organizations use _Black_: Dropbox. +The following organizations use _Black_: Facebook, Dropbox. Are we missing anyone? Let us know. diff --git a/docs/index.rst b/docs/index.rst index 2fa910c..4ca9877 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -54,6 +54,7 @@ Contents pyproject_toml editor_integration blackd + black-primer version_control_integration ignoring_unmodified_files contributing