Minor gpiod package release.
Changelog:
- add fileno() for Chip and LineRequest
- relax the verbosity adjustment in build_tests.sh
- fix potential PyDict_Next() crash
- fix tests failing after a kernel fix to gpio-sim
- various documentation fixes
- rework the code treewide to make it conformant with mypy and ruff
linter recommendations
- fix requesting lines by name with multiple entries
- fix a use-after-free bug in python bindings
- fix passing the event clock property to line requests in python
bindings
- improve the output of LineSettings.__repr__()
- import gpiod attributes in external module
- specify a tar extract filter for python >= 3.12
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Linux kernel commit 8bd76b3d3f3a ("gpio: sim: lock up configfs that an
instantiated device depends on") uncovered an issue in Python bindings
tests where the GPIO simulator device is not disabled before removing its
configfs entries. Reorder the operations in chip_finalize() in order to
disable the device first (if needed) before releasing any other
resources.
Link: https://lore.kernel.org/r/20250203-fix-gpiosim-in-bindings-v1-2-d2c9e0f3a29d@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Certain polling APIs in the standard library - most notably: the
select() function and the poll class - allow to poll any object that
implements the fileno() method returning the underlying file descriptor
number.
Implement fileno() for Chip and LineRequest which allows users to do:
rd, _, _ = select([chip/request], [], [], 1)
where rd will contain the actual object passed to select which makes for
easier reading of events afterwards.
Reviewed-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241211-python-fileno-v2-1-84c642572485@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
When building tests using the build_tests.py script, we try to increase
the verbosity using setuptools.logging.configure() preferably but
falling back to distutils.log.set_verbosity() if the former is missing.
This however creates a hard dependency on distutils on older environments
missing the recently added setuptools method. The build however, can work
fine even with default (low) verbosity so instead of bailing out if the
second import fails, just keep going.
Reviewed-by: Vincent Fazio <vfazio@xes-inc.com>
Closes: https://github.com/brgl/libgpiod/issues/109
Link: https://lore.kernel.org/r/20241127133139.120107-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
We claim that libgpiod python bindings have no dependencies other than
the python standard library but this is not true - the tests do depend
on deprecated distutils for kernel version parsing.
As distutils is deprecated, the recommended improvement is to use the
Version class from packaging.version but this would too entail pulling
in an external module.
Let's instead implement the kernel version check in C using uname() and
put it into the tests.system extension. This allows us to entirely drop
the distutils import.
Reviewed-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241120-drop-distutils-v1-3-7498e8b3babe@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The module is now called _internal.py so update the Makefile. Without
this, we're no longer able to generate the distro tarball.
Fixes: b306ce694a ("bindings: python: make internal a private submodule")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Since their inclusion in Python 3.6, f-strings have become the preferred
way to format strings with variable values as they are generally more
readable as the value substitution is in place and doesn't have to be
parsed from the list or arguments to `.format()`.
Where it does not impact readability (when the line is <120 characters),
swap usage of `.format()` to an f-string.
For lines that are not converted, inform the linter to ignore attempts
to upgrade those instances to f-strings [0]
[0]: https://docs.astral.sh/ruff/rules/f-string/
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-23-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Some of the unit tests intentionally call methods or assign properties
with invalid values to ensure they fail in an expected way.
Type checkers complain for these instances so inform them via directive
that these lines should be ignore for specific errors.
Additionally, some lines that access properties without assigning the
value look like they perform no action to linters.
To appease the linter, read the value into a throw-away variable.
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-22-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Add type hints for internal members of the test cases so type checkers
can ensure the code properly constrains to these types and accounts for
scenarios where the values are `None`.
In most cases, the type checker is allowed to assume the inferred type
upon assignment.
An example is any test case that creates a `Chip` as part of its `setUp`
method. Many of these tests subsequently set the reference to `None` in
`tearDown` to free up resources to be collected by the GC.
If the member was "properly" typed to be `Optional`, all references in
the unit tests would need to be guarded by an assert or a cast or
ignored by the type checker. This is noisy and doesn't add value since
for the life of the test it should always be a valid reference.
Instead, allow `tearDown` to violate the inferred type and inform the
type checker to ignore the assignment via directive.
If the tests are ever changed to set the member to something other than
the inferred type outside of `tearDown`, explicit type hints and proper
checks should be added.
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-21-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Previously, both tests_edge_event and tests_info_event had a public
module level EventType member.
The __main__ module for unittests does a star import from both modules
which led to an import conflict between the two.
It is not necessary to import EventType to run unit tests.
Now, EventType is private to avoid being imported via star syntax.
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-18-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Previously, the `test_rising_edge_event` test was defined twice.
The second instance of the test actually tested the falling edge event
and was shadowing the first test which tested the rising edge event.
Now, the second instance is renamed to `test_falling_edge_event` to
reflect what it is testing and to avoid the naming conflict.
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-16-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Since their inclusion in Python 3.6, f-strings have become the preferred
way to format strings with variable values as they are generally more
readable as the value substitution is in place and doesn't have to be
parsed from the list or arguments to `.format()`.
Where it does not impact readability (when the line is <120 characters),
swap usage of `.format()` to an f-string.
For lines that are not converted, inform the linter to ignore attempts
to upgrade those instances to f-strings [0]
[0]: https://docs.astral.sh/ruff/rules/f-string/
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-15-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The `values` argument of `_ext.Request.get_values` uses a preallocated
`list[None]` as a buffer that is populated with `Value`s by the external
module that are then returned from the function.
Use `cast` to inform the type checker it's a `list[Value]` despite how
it's allocated.
Also, as `lines` is typed as an `Iterable`, there is no guarantee it has
a `__len__` method. Instead, use the size of the `offsets` array to
allocate the buffer.
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-14-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Since `LineRequest._req` is typed to be `Optional` and because type
checkers may not be able to infer that an object is not `None` from an
earlier call (such as `_check_released`) it is necessary to inform type
checkers of the state of the object to silence union-attr [0] errors.
Instead of littering the code with "# type: ignore" comments, use casts
to inform type checkers that objects are not `None`.
Using `assert` is another option, however this duplicates the logic in
`_check_released` so is redundant at best and, at worst, is not a safe
replacement as `assert` can be elided in optimized Python environments
and these checks need to be runtime enforced.
[0]: https://mypy.readthedocs.io/en/stable/error_code_list.html#check-that-attribute-exists-in-each-union-item-union-attr
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-12-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Since `Chip._chip` is typed to be `Optional` and because type checkers
may not be able to infer that an object is not `None` from an earlier
call (such as `_check_closed`) it is necessary to inform type checkers
of the state of the object to silence union-attr [0] errors.
Instead of littering the code with "# type: ignore" comments, use casts
to inform type checkers that objects are not `None`.
Using `assert` is another option, however this duplicates the logic in
`_check_closed` so is redundant at best and, at worst, is not a safe
replacement as `assert` can be elided in optimized Python environments
and these checks need to be runtime enforced.
[0]: https://mypy.readthedocs.io/en/stable/error_code_list.html#check-that-attribute-exists-in-each-union-item-union-attr
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-10-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Previously, `Chip.request_lines` and `LineRequest.reconfigure_lines`
were typed to accept a config argument that was either an int, a str,
or a tuple[int | str].
This had two downsides, namely:
* The tuple was typed as having only a single element and not a variable
number of elements. The examples and test suite relied on a variable
length tuple.
* The tuple type itself was overly restictive. The function
implementations had no requirement that the value be a tuple, only
that it was iterable if it was not a str or an int.
Now, these functions accept an Iterable[int | str] instead of tuples to
offer greater flexibility to callers.
This change does not break compatibility for existing users.
Closes: https://github.com/brgl/libgpiod/issues/102
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241114145116.2123714-4-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
We no longer use the select module directly in chip.py so drop the
unneeded import.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Previously, the external module relied on gpiod attributes being present
within `globals()` to construct return values back to the caller.
This assumption required callers of the external module to have imported
the attributes to populate `globals()` for the interface to work.
Having this implicit contract is opaque and prone to causing issues if
imports within gpiod modules ever get reworked.
Now, the external module explicitly imports attributes from gpiod in
order to return values back to the caller.
There should be no concern about circular imports as the external module
should be completely imported by the time callers call into it.
Since Py_gpiod_GetGlobalType is no longer used, it has been replaced
with Py_gpiod_GetModuleAttrString which returns a new PyObject*
reference for the named module and attribute that must be decremented
when no longer in use.
Closes: https://github.com/brgl/libgpiod/issues/101
Signed-off-by: Vincent Fazio <vfazio@xes-inc.com>
Link: https://lore.kernel.org/r/20241008175139.1198980-1-vfazio@xes-inc.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Several files are not being included in distro tarballs so the
functionality of the python build is limited compared to the repo. Add
them to EXTRA_DIST.
Fixes: d588a6a592 ("bindings: python: standalone build tooling for tests")
Fixes: 72d2fa01a2 ("bindings: python: add script to generate sdist and wheels")
Fixes: 85089d0e40 ("bindings: python: add pyproject.toml, pep 518")
Fixes: 389a966d4e ("bindings: python: move long_description into README.md")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The purpose of the example is demonstrate using a request with poll().
It provides a hint as to how the poll can be combined with other fds but,
as Python comes with batteries included, the Python version of the example
can be readily extended to actually demonstrate this, as well as how it
can be used in multi-threaded environments.
Extend the example to use an eventfd to allow the poll() to be run in
a background thread and be gracefully terminated by the main thread.
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20240917125455.324551-1-warthog618@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Use black to make the coding style of the line-request test cases
consistent with the rest of the codebase.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
We currently only have a test-case that checks if the event clock
property is correctly set in the LineSettings object but not whether it
is actually passed to the line request. Extend the existing test-case for
line requests to account for event clocks as well.
Link: https://lore.kernel.org/r/20240731104658.93117-2-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
