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Nipunn Koorapati [Sat, 29 Jan 2022 02:13:18 +0000 (18:13 -0800)]
Fix instability due to trailing comma logic (#2572)
It was causing stability issues because the first pass
could cause a "magic trailing comma" to appear, meaning
that the second pass might get a different result. It's
not critical.
Some things format differently (with extra parens)
Shantanu [Sat, 29 Jan 2022 00:57:05 +0000 (16:57 -0800)]
Fix arithmetic stability issue (#2817)
It turns out "simple_stmt" isn't that simple: it can contain multiple
statements separated by semicolons. Invisible parenthesis logic for
arithmetic expressions only looked at the first child of simple_stmt.
This causes instability in the presence of semicolons, since the next
run through the statement following the semicolon will be the first
child of another simple_stmt.
I believe this along with #2572 fix the known stability issues.
This adds a test that lists a number of cases of unstable formatting
that we have seen in the issue tracker. Checking it in will ensure
that we don't regress on these cases.
Jelle Zijlstra [Thu, 27 Jan 2022 01:18:43 +0000 (17:18 -0800)]
black-primer: stop running it (#2809)
At the moment, it's just a source of spurious CI failures and busywork
updating the configuration file.
Unlike diff-shades, it is run across many different platforms and
Python versions, but that doesn't seem essential. We already run unit
tests across platforms and versions.
I chose to leave the code around for now in case somebody is using it,
but CI will no longer run it.
Richard Si [Tue, 25 Jan 2022 03:13:34 +0000 (22:13 -0500)]
Hug power operators if its operands are "simple" (#2726)
Since power operators almost always have the highest binding power in expressions, it's often more readable to hug it with its operands. The main exception to this is when its operands are non-trivial in which case the power operator will not hug, the rule for this is the following:
> For power ops, an operand is considered "simple" if it's only a NAME, numeric CONSTANT, or attribute access (chained attribute access is allowed), with or without a preceding unary operator.
Felix Hildén [Mon, 24 Jan 2022 15:35:56 +0000 (17:35 +0200)]
Make SRC or code mandatory and mutually exclusive (#2360) (#2804)
Closes #2360: I'd like to make passing SRC or `--code` mandatory and the arguments mutually exclusive. This will change our (partially already broken) promises of CLI behavior, but I'll comment below.
Perry Vargas [Sat, 22 Jan 2022 06:00:33 +0000 (22:00 -0800)]
Allow setting custom cache directory on all platforms (#2739)
Fixes #2506
``XDG_CACHE_HOME`` does not work on Windows. To allow for users to set a custom cache directory on all systems I added a new environment variable ``BLACK_CACHE_DIR`` to set the cache directory. The default remains the same so users will only notice a change if that environment variable is set.
The specific use case I have for this is I need to run black on in different processes at the same time. There is a race condition with the cache pickle file that made this rather difficult. A custom cache directory will remove the race condition.
I created ``get_cache_dir`` function in order to test the logic. This is only used to set the ``CACHE_DIR`` constant.
Richard Si [Fri, 21 Jan 2022 23:00:13 +0000 (18:00 -0500)]
Switch to Furo (#2793)
- Add Furo dependency to docs/requirements.txt
- Drop a fair bit of theme configuration
- Fix the toctree declarations in index.rst
- Move stuff around as Furo isn't 100% compatible with Alabaster
Furo was chosen as it provides excellent mobile support, user
controllable light/dark theming, and is overall easier to read
Michael Marino [Fri, 21 Jan 2022 00:45:28 +0000 (01:45 +0100)]
Add support for custom python cell magics (#2744)
Fixes #2742.
This PR adds the ability to configure additional python cell magics. This
will allow formatting cells in Jupyter Notebooks that are using custom (python)
magics.
Shivansh-007 [Mon, 10 Jan 2022 13:58:35 +0000 (19:28 +0530)]
Enhance `--verbose` (#2526)
Black would now echo the location that it determined as the root path
for the project if `--verbose` is enabled by the user, according to
which it chooses the SRC paths, i.e. the absolute path of the project
is `{root}/{src}`.
Richard Si [Mon, 10 Jan 2022 12:16:30 +0000 (07:16 -0500)]
Remove Python 2 support (#2740)
*blib2to3's support was left untouched because: 1) I don't want to touch
parsing machinery, and 2) it'll allow us to provide a more useful error
message if someone does try to format Python 2 code.
Jelle Zijlstra [Sat, 4 Dec 2021 23:57:40 +0000 (15:57 -0800)]
Reorganize changelog (#2669)
I believe it would be useful to split up the long list of changes a bit more.
Specific changes:
- Removed the entry for new flake8 plugins; this is purely internal and not of interest to users
- Put regex in the packaging section
- New section for Jupyter Notebook
- New section for Python 3.10, mostly match/case stuff
Jelle Zijlstra [Thu, 2 Dec 2021 22:35:02 +0000 (14:35 -0800)]
Remove regex dependency (GH-2663)
We were no longer using it since GH-2644 and GH-2654. This should hopefully
make using Black easier to use as there's one less compiled dependency.
The core team also doesn't have to deal with the surprisingly frequent fires
the regex packaging setup goes through.
Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>
Richard Si [Wed, 1 Dec 2021 23:05:59 +0000 (18:05 -0500)]
Treat functions/classes in blocks as if they're nested (GH-2472)
* Treat functions/classes in blocks as if they're nested
One curveball is that we still want two preceding newlines before blocks
that are probably logically disconnected. In other words:
if condition:
def foo():
return "hi"
# <- aside: this is the goal of this commit
else:
def foo():
return "cya"
# <- the two newlines spacing here should stay
# since this probably isn't related
with open("db.json", encoding="utf-8") as f:
data = f.read()
Unfortunately that means we have to special case specific clause types
instead of just being able to just for a colon leaf. The hack used here
is to check whether we're adding preceding newlines for a standalone or
dependent clause. "Standalone" being a clause that doesn't need another
clause to be valid (eg. if) and vice versa.
Jelle Zijlstra [Wed, 1 Dec 2021 02:01:36 +0000 (18:01 -0800)]
Reduce usage of regex (#2644)
This removes all but one usage of the `regex` dependency. Tricky bits included:
- A bug in test_black.py where we were incorrectly using a character range. Fix also submitted separately in #2643.
- `tokenize.py` was the original use case for regex (#1047). The important bit is that we rely on `\w` to match anything valid in an identifier, and `re` fails to match a few characters as part of identifiers. My solution is to instead match all characters *except* those we know to mean something else in Python: whitespace and ASCII punctuation. This will make Black able to parse some invalid Python programs, like those that contain non-ASCII punctuation in the place of an identifier, but that seems fine to me.
- One import of `regex` remains, in `trans.py`. We use a recursive regex to parse f-strings, and only `regex` supports that. I haven't thought of a better fix there (except maybe writing a manual parser), so I'm leaving that for now.
My goal is to remove the `regex` dependency to reduce the risk of breakage due to dependencies and make life easier for users on platforms without wheels.
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