uniffi-bindgen verion 0.26 not supported about maturin HOT 5 CLOSED

I also have been running into an issue using the work-around where maturin build cannot find the dylib (I'm on macOS) built by uniffi because the library built is called libuniffi_uniffi_test, which I can see when I unpack the wheel after running pip install . This doesn't match with the command above, which is pulling the correct dylib from the target directory, so I'm not sure what is going on here. I will try and create a MWE repo for this issue, but again, I'm having trouble because it seems that maturin new -b uniffi uses a UDL file, while I'm using their proc macros and v0.26 of the uniffi crate.

I have found another work-around for this issue, which is to first call maturin develop, which generates an additional module within my python directory with the incorrectly named dylib. I then re-name the dylib manually to what it is supposed to be (libuniffi_test.dylib), and then run maturing build and pip install .. This somehow collects the "correct" library.

I think this is also related to the fact that I get an ImporError when using maturin develop. Again, I apologize for the lack of a MWE, but as you can tell, there is a lot of complexity to this issue! I'll keep digging and report back.

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I also ran into this incompatibility but on my machine (Arch Linux) the build suceeds but fails to load. For example installing test-crates/uniffi-mixed from the maturin repo and running python test-crates/uniffi-mixed/check_installed/check_installed.py

Traceback (most recent call last):
  File "maturin/test-crates/uniffi-mixed/check_installed/check_installed.py", line 3, in <module>
    import uniffi_mixed
  File "maturin/test-crates/uniffi-mixed/uniffi_mixed/__init__.py", line 1, in <module>
    from .uniffi_mixed import *  # NOQA
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "maturin/test-crates/uniffi-mixed/uniffi_mixed/uniffi_mixed/__init__.py", line 1, in <module>
    from .math import *  # NOQA
    ^^^^^^^^^^^^^^^^^^^
  File "maturin/test-crates/uniffi-mixed/uniffi_mixed/uniffi_mixed/math.py", line 766, in <module>
    _uniffi_check_contract_api_version(_UniffiLib)
  File "maturin/test-crates/uniffi-mixed/uniffi_mixed/uniffi_mixed/math.py", line 476, in _uniffi_check_contract_api_version
    raise InternalError("UniFFI contract version mismatch: try cleaning and rebuilding your project")
uniffi_mixed.uniffi_mixed.math.InternalError: UniFFI contract version mismatch: try cleaning and rebuilding your project

The error is triggered by bindings_contract_version = 25 and scaffolding_contract_version = 24

after installing uniffi-bindgen==0.25.0 after rebuilding check_installed.py prints SUCCESS

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You need to make sure your uniff crate major.minor version is aligned with the python uniffi-bindgen package version.

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FYI, the python uniffi-bindgen package exists as an optimization to reduce compilation time for uniffi bindings, you can use the official recommended way of creating the uniffi-bindgen binary in your project to better satisfy the version requirement.

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Thank you for the additional info! Yes, on further inspection, my uniffi crate version was 0.25, and it just so happened that I began using maturin a day after the 0.26 release happened 😆 .

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