* Add support for positional-only args
* Update changelog. Add a few more tests. Run rust-fmt.
* Fix test.
* Fix tests again.
* Update CHANGELOG.md to link PR instead of issue
* Update guide to mention positional-only params
* Add unreachable!() per code review
* Update and expand tests for pos args.
* Fix tests, lint, add UI tests.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
* Add 'anyhow' feature which provides simple From<anyhow::Error> for PyErr impl
This makes it possible to use anyhow::Result<T> as the return type for
methods and functions exposed to Python.
The current implementation just stringifies the anyhow::Error before
shoving it into a PyRuntimeError. Conversion back to the anyhow::Error
is not possible, but it is better than nothing.
Signed-off-by: Chris Laplante <chris.laplante@agilent.com>
* Document `anyhow` feature in the guide
Signed-off-by: Chris Laplante <chris.laplante@agilent.com>
* update changelog to document anyhow feature
* WIP adding tests
* Finish up anyhow feature
* Fix formatting
* Fix tests
* Fix tests
* Apply review suggestions
Co-authored-by: Bruno Kolenbrander <59372212+mejrs@users.noreply.github.com>
Co-authored-by: mejrs <brunokolenbrander@hotmail.com>
* Remove use of unwrap
* Update changelog
* Update CHANGELOG.md
Co-authored-by: Mo Mirza <mo.mirza@iwoca.co.uk>
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
I have a use case in PyOxidizer where I want to use the
pyo3-build-config crate as a library crate so I can access the
`InterpreterConfig` struct so I can read/write config files without
reinventing the wheel.
This is doable before this commit. But it requires that the
build environment have a Python interpreter. This is undesirable
for library usage.
This commit introduces a cargo feature flag to control whether the
build script does anything. The feature flag must be present for
the build script to resolve a config. The feature flag is enabled
by default for backwards compatibility. The pyo3 and pyo3-macros-backend
crates use this feature by default, for backwards compatibility and
because it is the reasonable default.
This is probably room to conditionalize some APIs and other behavior
based on this feature flag. But we stop short of doing that for
the time being.
PyOxidizer has crates depending on `pyo3` that would like to access
the `pyo3` crate configuration. (This use case isn't unique to
PyOxidizer.)
Cargo has a facility for enabling the build scripts of dependent
crates to access _exported_ variables via `DEP_` environment
variables. However, this only works if the exporting crate defines a
`links` key in its Cargo manifest. See
https://doc.rust-lang.org/cargo/reference/build-scripts.html#the-links-manifest-key.
While `pyo3`'s build script doesn't yet export the variables that
PyOxidizer will need, a prerequisite to making this work is adding
the `links` key. Since this change could introduce unintended
side-effects, it warrants being made in its own commit, which is
why we're making this change outside of #1793.
I _think_ this change should be mostly safe: the `links` key is
effectively metadata advertising that a crate links against a named
library. The only side-effects setting it has is to enable the
aforementioned `DEP_` environment variables in build scripts and
enforcing a limitation that only a single crate may link against the
same native library. I believe the only potential for this change
to cause problems is if there are multiple crates with `links =
"python"` entries. I'm not aware of any other crates that advertise
`links = "python"`: even `python3-sys` / `cpython` use `links =
"python3"` so this change should not prevent dual use of `pyo3` and
`cpython` in the same build.
With the recent implementation of non-limited unicode APIs, we're
able to query Python's low-level state to access the raw bytes that
Python is using to store string objects.
This commit implements a safe Rust API for obtaining a view into
Python's internals and representing the raw bytes Python is using
to store strings.
Not only do we allow accessing what Python has stored internally,
but we also support coercing this data to a `Cow<str>`.
Closes#1776.
