Implementation stolen from PR davidhalter/parso#162. Thanks parso!
I could add support for these newer syntactical constructs in the
target version detection logic, but until I get diff-shades up
and running I don't feel very comfortable adding the code.
Fixes#2359.
This commit now makes Black exit with an user-friendly error message if a
.gitignore file couldn't be parsed -- a massive improvement over an opaque
traceback!
To summarise, based on what was discussed in that issue:
due to not being able to parse automagics (e.g. pip install black)
without a running IPython kernel, cells with syntax which is parseable
by neither ast.parse nor IPython will be skipped cells with multiline
magics will be skipped trailing semicolons will be preserved, as they
are often put there intentionally in Jupyter Notebooks to suppress
unnecessary output
Commit history before merge (excluding merge commits):
* wip
* fixup tests
* skip tests if no IPython
* install test requirements in ipynb tests
* if --ipynb format all as ipynb
* wip
* add some whole-notebook tests
* docstrings
* skip multiline magics
* add test for nested cell magic
* remove ipynb_test.yml, put ipynb tests in tox.ini
* add changelog entry
* typo
* make token same length as magic it replaces
* only include .ipynb by default if jupyter dependencies are found
* remove logic from const
* fixup
* fixup
* re.compile
* noop
* clear up
* new_src -> dst
* early exit for non-python notebooks
* add non-python test notebook
* add repo with many notebooks to black-primer
* install extra dependencies for black-primer
* fix planetary computer examples url
* dont run on ipynb files by default
* add scikit-lego (Expected to change) to black-primer
* add ipynb-specific diff
* fixup
* run on all (including ipynb) by default
* remove --include .ipynb from scikit-lego black-primer
* use tokenize so as to mirror the exact logic in IPython.core.displayhooks quiet
* fixup
* 🎨
* clarify docstring
* add test for when comment is after trailing semicolon
* enumerate(reversed) instead of [::-1]
* clarify docstrings
* wip
* use jupyter and no_jupyter marks
* use THIS_DIR
* windows fixup
* perform safe check cell-by-cell for ipynb
* only perform safe check in ipynb if not fast
* remove redundant Optional
* 🎨
* use typeguard
* dont process cell containing transformed magic
* require typing extensions before 3.10 so as to have TypeGuard
* use dataclasses
* mention black[jupyter] in docs as well as in README
* add faq
* add message to assertion error
* add test for indented quieted cell
* use tokenize_rt else we cant roundtrip
* fmake fronzet set for tokens to ignore when looking for trailing semicolon
* remove planetary code examples as recent commits result in changes
* use dataclasses which inherit from ast.NodeVisitor
* bump typing-extensions so that TypeGuard is available
* bump typing-extensions in Pipfile
* add test with notebook with empty metadata
* pipenv lock
* deprivative validate_cell
* Update README.md
* Update docs/getting_started.md
* dont cache notebooks if jupyter dependencies arent found
* dont write to cache if jupyter deps are not installed
* add notebook which cant be parsed
* use clirunner
* remove other subprocess calls
* add docstring
* make verbose and quiet keyword only
* 🎨
* run second many test on directory, not on file
* test for warning message when running on directory
* early return from non-python cell magics
* move NothingChanged to report to avoid circular import
* remove circular import
* reinstate --ipynb flag
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Commit history before merge:
* Accept empty stdin (close#2337)
* Update tests/test_black.py
* Add changelog
* Assert Black reformats an empty string to an empty string (#2337) (#2346)
* fix
Click types have been moved to click repo itself. See pallets/click#1856
I've had some issues with typeshed types being outdated in another project
so might be good to avoid that here.
Commit history before merge:
* Get `click` types from main repo
* Fix mypy errors
* Require click v8 for type annotations
* Update Pipfile
Closes#1246: This PR adds a new option (and automatically a toml entry, hooray for existing configuration management 🎉) to require a specific version of Black to be running.
For example: `black --required-version 20.8b -c "format = 'this'"`
Execution fails straight away if it doesn't match `__version__`.
Commit history before merge:
Black now respects .gitignore files in all levels, not only root/.gitignore file
(apply .gitignore rules like git does).
* Fix: typo
* Fix: respect .gitignore files in all levels.
* Add: CHANGELOG note.
* Fix: TypeError: unsupported operand type(s) for +: 'NoneType' and 'PathSpec'
* Update docs.
* Fix: no parent .gitignore
* Add a comment since the if expression is a bit hard to understand
* Update tests - conver no parent .gitignore case.
* Use main's Pipfile.lock instead
The original changes in Pipfile.lock are whitespace only. The changes
turned the JSON's file indentation from 4 to 2. Effectively this
happened: `json.dumps(json.loads(old_pipfile_lock), indent=2) + "\n"`.
Just using main's Pipfile.lock instead of undoing the changes because
1) I don't know how to do that easily and quickly, and 2) there's a
merge conflict.
Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>
* Merge remote-tracking branch 'upstream/main' into i1730 …
conflicts for days ay?
We've depended on Click 7.x ever since we broke CI systems across the
world (oops lol) and flake8-mypy was purged a fair bit back: #1867
Also remove the primer tests import in tests/test_black.py because it's
annoying when just trying to actually target tests/test_black.py tests.
`pytest -k test_black.py` doesn't do what you expect due to that import.
There's three optimizations in this commit:
1. Don't check if Black's output is stable or equivalant if no changes
were made in the first place. It's not like passing the same code
(for both source and actual) through black.assert_equivalent or
black.assert_stable is useful. It's not a big deal for the smaller
tests, but it eats a lot of time in tests/test_format.py since
its test cases are big. This is also closer to how Black works IRL.
2. Use a smaller file for `test_root_logger_not_used_directly` since
the logging it's checking happens during blib2to3's startup so the
file doesn't really matter.
3. If we're checking a file is formatting (i.e. test_source_is_formatted)
don't run Black over it again with `black.format_file_in_place`.
`tests/test_format.py::TestSimpleFormat.check_file` is good enough.
* Move string-related utility to functions to strings.py, const.py
* Move Leaf/Node-related functionality to nodes.py
* Move comment-related functions to comments.py
* Move caching to cache.py and Mode/TargetVersion/Feature to mode.py
* Move some leftover functions to nodes.py, comments.py, strings.py
* Add missing files to source list for test runs
* Move line-related functionality into lines.py, brackets into brackets.py
* Move transformers to trans.py
* Move file handling, output, parsing, concurrency, debug, and report
* Move two more functions to nodes.py
* Add CHANGES
* Add numeric.py
* Add linegen.py
* More docstrings
* Include new files in tests
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Closes#2164.
Changes behavior of how .gitignore is handled. With this change, the rules in .gitignore are only used as a fallback if no exclusion rule is explicitly passed on the command line or in pyproject.toml. Previously they were used regardless if explicit exclusion rules were specified, preventing any overriding of .gitignore rules.
Those that depend only on .gitignore for their exclusion rules will not be affected. Those that use both .gitignore and exclude will find that exclude will act more like actually specifying exclude and not just another extra-excludes. If the previous behavior was desired, they should move their rules from exclude to extra-excludes.
We're only fixing them so fuzzers don't yell at us when we break "valid"
code. I mean "valid" because some of the examples aren't even accepted by
Python.
Optional trailing commas put by Black become magic trailing commas on another
pass of the tool. Since they are influencing formatting around optional
parentheses, on rare occasions the tool changes its mind in terms of putting
parentheses or not.
Ideally this would never be the case but sadly the decision to put optional
parentheses or not (which looks at pre-existing "magic" trailing commas) is
happening around the same time as the decision to put an optional trailing
comma. Untangling the two proved to be impractically difficult.
This shameful workaround uses the fact that the formatting instability
introduced by magic trailing commas is deterministic: if the optional trailing
comma becoming a pre-existing "magic" trailing comma changes formatting, the
second pass becomes stable since there is no variable factor anymore on pass 3,
4, and so on.
For most files, this will introduce no performance penalty since `--safe` is
already re-formatting everything twice to ensure formatting stability. We're
using this result and if all's good, the behavior is equivalent. If there is
a difference, we treat the second result as the binding one, and check its
sanity again.
* Added support for top-level user configuration
At the user level, a TOML config can be specified in the following locations:
* Windows: ~\.black
* Unix-like: $XDG_CONFIG_HOME/black (~/.config/black fallback)
Instead of changing env vars for the entire black-primer process, they
are now changed only for the black subprocess, using a tmpdir.
Fixes: #1662
Work-around for https://bugs.python.org/issue2142
The test has to slightly mess with its input data, because the utility
functions default to ensuring the test data has a final newline, which
defeats the point of the test.
Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
* Add test case to illustrate the issue
* Accept carriage returns as valid separators while enumerating comments
Without this acceptance, escaped multi-line statments that use carriage returns will not be counted into the 'ignored_lines' variable since the emitted line values will end with a CR and not an escape character. That leads to comments associated with the line being incorrectly labeled with the STANDALONE_COMMENT type, affecting comment placement and line space management.
* Remove comment linking to ephemeral build log
* Provide a stdin-filename to allow stdin to respect exclude/force-exclude rules
This will allow automatic tools to enforce the project's
exclude/force-exclude rules even if they pass the file through stdin to
update its buffer.
This is a similar solution to --stdin-display-name in flake8.
* Update src/black/__init__.py
Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>
* --stdin-filename should only respect --exclude-filename
* Update README with the new --stdin-filename option
* Write some tests for the new stdin-filename functionality
* Apply suggestions from code review
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
* Force stdin output when we asked for stdin even if the file exists
* Add an entry in the changelog regarding --stdin-filename
* Reduce disk reads if possible
Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>
* Check for is_stdin and p.is_file before checking for p.is_dir()
Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Black used to erroneously remove all empty lines between non-function
code and decorators when formatting typing stubs. Now a single empty
line is enforced.
I chose for putting empty lines around decorated classes that have empty
bodies since removing empty lines around such classes would cause a
formatting issue that seems to be impossible to fix.
For example:
```
class A: ...
@some_decorator
class B: ...
class C: ...
class D: ...
@some_other_decorator
def foo(): -> None: ...
```
It is easy to enforce no empty lines between class A, B, and C.
Just return 0, 0 for a line that is a decorator and precedes an stub
class. Fortunately before this commit, empty lines after that class
would be removed already.
Now let's look at the empty line between class D and function foo. In
this case, there should be an empty line there since it's class code next
to function code. The problem is that when deciding to add X empty lines
before a decorator, you can't tell whether it's before a class or a
function. If the decorator is before a function, then an empty line
is needed, while no empty lines are needed when the decorator is
before a class.
So even though I personally prefer no empty lines around decorated
classes, I had to go the other way surrounding decorated classes with
empty lines.
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
The quotes of multiline docstrings are now only normalized when string
normalization is off, instead of the string normalization setting being
ignored and the quotes being *always* normalized.
I had to make a new test case and data file since the current pair for
docstrings only worked when there is no formatting difference between the
formatting results with string normalization on and off. I needed to add
tests for when there *are* differences between the two. So I split
test_docstring's test code when string normalization is disabled into a
new test case along with a new data file.
This addresses a few crashers, namely:
* producing non-equivalent code due to mangling escaped newlines,
* invalid hugging quote characters in the docstring body to the docstring outer
triple quotes (causing a quadruple quote which is a syntax error),
* lack of handling for docstrings that start on the same line as the `def`, and
* invalid stripping of outer triple quotes when the docstring contained
a string prefix.
As a bonus, tests now also run when string normalization is disabled.
This required some hackery. Long story short, we need to reuse the ability to
omit rightmost bracket pairs (which glues them together and splits on something
else instead), for use with pre-existing trailing commas.
This form of user-controlled formatting is brittle so we have to be careful not
to cause a scenario where Black first formats code without trailing commas in
one way, and then looks at the same file with pre-existing trailing commas
(that it itself put on the previous run) and decides to format the code again.
One particular ugly edge case here is handling of optional parentheses. In
particular, the long-standing `line_length=1` hack got in the way of
pre-existing trailing commas and had to be removed. Instead, a more
intelligent but costly solution was put in place: a "second opinion" if the
formatting that omits optional parentheses ended up causing lines to be too
long. Again, for efficiency purposes, Black reuses Leaf objects from blib2to3
and modifies them in place, which was invalid for having two separate
formattings. Line cloning was used to mitigate this.
Fixes#1619
- when a trailing comma is specified in any bracket pair, that signals to Black
that this bracket pair needs to be always exploded, e.g. presented as "one
item per line";
- this causes some changes to previously formatted code that erroneously left
trailing commas embedded into single-line expressions;
- internally, Black needs to be able to identify trailing commas that it put
itself compared to pre-existing trailing commas. We do this by using/abusing
lib2to3's `was_checked` attribute. It's True for internally generated
trailing commas and False for pre-existing ones (in fact, for all
pre-existing leaves and nodes).
Fixes#1288
* put experimental string stuff behind a flag
* update tests
* don't need an output section if it's the same as the input
* Primer: Expect no formatting changes in attrs, hypothesis and poetry with --experimental-string-processing off
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Ever since --force-exclude was added, --exclude started to touch files
that were given to Black through the CLI too. This is not documented
behaviour and neither expected as --exclude and --force-exclude now
behave the same!
Before this commit, get_sources() when encountering a file that was passed
explicitly through the CLI would pass a single Path object list to
gen_python_files(). This causes bad behaviour since that function
doesn't treat the exclude and force_exclude regexes differently. Which
is fine for recursively found files, but *not* for files given through
the CLI.
Now when get_sources() iterates through srcs and encounters
a file, it checks if the force_exclude regex matches, if not, then the
file will be added to the computed sources set.
A new function had to be created since before you can do regex matching,
the path must be normalized. The full process of normalizing the path is
somewhat long as there is special error handling. I didn't want to
duplicate this logic in get_sources() and gen_python_files() so that's
why there is a new helper function.
