Provided by: black_23.7.0-1_all 
NAME
black-primer - CI tool to check a number of projects in parallel using black
DESCRIPTION
black-primer is a tool built for CI (and humans) to have black --check a number of Git
accessible projects in parallel. Projects are configured in primer.json
RUN FLOW
• Ensure we have black + git installed
• 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 schematics)
• 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
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: 2]
-h, --help Show this message and exit.
## Primer config file
The config file is in JSON format. Its main element is the "projects" dictionary and each
parameter is explained below:
{
"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 default 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"]
}
}
}
An example primer config file is used by Black [here](‐
https://github.com/psf/black/blob/master/src/black_primer/primer.json)
EXAMPLE RUN
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 should not crash
(a, b, c) = list(range(3))
# it is 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.
COPYRIGHT
2018 Łukasz Langa