Loading Glyphs file failed: 'str' object has no attribute 'read'

[atzlinux]

In Debian 12, when I build , test has many errors:

cd .pybuild/cpython3_3.11/build
python3.11 -m pytest tests

`
FAILED tests/test_main.py::test_main_export_custom_ufo_structure[package-False] - SystemExit: fontmake: Error: In 'tests/data/GlyphsUnitTestSans.glyphs': Loading Glyphs file failed: 'str' object has no attribute 'read'
FAILED tests/test_main.py::test_main_export_custom_ufo_structure[package-True] - SystemExit: fontmake: Error: In 'tests/data/GlyphsUnitTestSans.glyphs': Loading Glyphs file failed: 'str' object has no attribute 'read'
FAILED tests/test_main.py::test_main_export_custom_ufo_structure[zip-False] - SystemExit: fontmake: Error: In 'tests/data/GlyphsUnitTestSans.glyphs': Loading Glyphs file failed: 'str' object has no attribute 'read'
FAILED tests/test_main.py::test_main_export_custom_ufo_structure[zip-True] - SystemExit: fontmake: Error: In 'tests/data/GlyphsUnitTestSans.glyphs': Loading Glyphs file failed: 'str' object has no attribute 'read'
============================================== 39 failed, 38 passed, 6 skipped, 6 warnings in 8.39s ==============================================

`

[anthrotype]

I suspect it might be related to these changes googlefonts/glyphsLib#932 released with glyphsLib 6.3.0. I'll take a look, thank you

[anthrotype]

actually I tried this locally and all tests pass even with latest glyphsLib 6.3.0 so I don't think it's that.
Can you copy/paste the output of pip freeze to see what versions of depdencies have you got?

[anthrotype]

also try use --verbose DEBUG to get the full traceback and see where exactly that exception is being thrown

[atzlinux]

In Debian 12, glyphslib is old version 6.0.6+ds1-1.
After I build and update to 6.3.0, this bug is not exist.

But there are other test not pass, I also think that it is caused by old software verison in Debian 12.

.....
            exclude_args(
                parser,
                args,
                [
                    "interpolate",
                    "variable_fonts",
                    "interpolate_binary_layout",
                    "round_instances",
                    "expand_features_to_instances",
                    "check_compatibility",
                ],
                inputs.format_name,
            )
            args.pop("ufo_structure", None)  # unused for UFO output
            args.pop("indent_json", None)
            project.run_from_ufos(
                inputs.ufo_paths, is_instance=args.pop("masters_as_instances"), **args
            )
        except FontmakeError as e:
            if PRINT_TRACEBACK:
                logging.exception(e)
                sys.exit(1)
>           sys.exit(f"fontmake: Error: {str(e)}")
E           SystemExit: fontmake: Error: In 'tests/data/GlyphsUnitTestSans.glyphs' -> 'master_ufo/GlyphsUnitTestSans.designspace': Generating fonts from Designspace failed: 'Font' object has no attribute 'tempLib'

fontmake/__main__.py:743: SystemExit
=============================== warnings summary ===============================
.pybuild/cpython3_3.11/build/tests/test_main.py::test_variable_otf
.pybuild/cpython3_3.11/build/tests/test_main.py::test_no_interpolation
.pybuild/cpython3_3.11/build/tests/test_main.py::test_no_interpolation
.pybuild/cpython3_3.11/build/tests/test_main.py::test_mti_sources
.pybuild/cpython3_3.11/build/tests/test_main.py::test_ufo_to_static_otf_cff2
.pybuild/cpython3_3.11/build/tests/test_main.py::test_ufoz_to_static_otf_cff2
.pybuild/cpython3_3.11/build/tests/test_main.py::test_static_otf_cffsubr_subroutinizer
  /usr/lib/python3/dist-packages/cffsubr/__init__.py:63: DeprecationWarning: path is deprecated. Use files() instead. Refer to https://importlib-resources.readthedocs.io/en/latest/using.html#migrating-from-legacy for migration advice.
    with path(__name__, TX_EXE) as tx_cli:

.pybuild/cpython3_3.11/build/tests/test_main.py::test_ufo_interpolation
  /usr/lib/python3/dist-packages/glyphsLib/glyphdata.py:108: DeprecationWarning: open_binary is deprecated. Use files() instead. Refer to https://importlib-resources.readthedocs.io/en/latest/using.html#migrating-from-legacy for migration advice.
    with open_binary("glyphsLib.data", "GlyphData.xml") as f1:

.pybuild/cpython3_3.11/build/tests/test_main.py::test_ufo_interpolation
  /usr/lib/python3/dist-packages/glyphsLib/glyphdata.py:109: DeprecationWarning: open_binary is deprecated. Use files() instead. Refer to https://importlib-resources.readthedocs.io/en/latest/using.html#migrating-from-legacy for migration advice.
    with open_binary("glyphsLib.data", "GlyphData_Ideographs.xml") as f2:

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================== short test summary info ============================
FAILED tests/test_compatibility.py::test_compatibility_cli - SystemExit: font...
FAILED tests/test_instantiator.py::test_strict_math_glyph - AssertionError: a...
FAILED tests/test_main.py::test_interpolation - SystemExit: fontmake: Error: ...
FAILED tests/test_main.py::test_interpolation_designspace_5 - SystemExit: fon...
FAILED tests/test_main.py::test_interpolation_and_masters_as_instances - Syst...
FAILED tests/test_main.py::test_masters_and_instances_ttf_interpolatable - Sy...
FAILED tests/test_main.py::test_variable_ttf - SystemExit: fontmake: Error: I...
FAILED tests/test_main.py::test_no_interpolation - SystemExit: fontmake: Erro...
FAILED tests/test_main.py::test_ufo_interpolation - SystemExit: fontmake: Err...
FAILED tests/test_main.py::test_ufo_interpolation_specific - SystemExit: font...
FAILED tests/test_main.py::test_subsetting[default] - SystemExit: fontmake: E...
FAILED tests/test_main.py::test_subsetting[no-write-skipexportglyphs] - Syste...
FAILED tests/test_main.py::test_keep_glyphs[default] - SystemExit: fontmake: ...
FAILED tests/test_main.py::test_keep_glyphs[no-write-skipexportglyphs] - Syst...
FAILED tests/test_main.py::test_shared_features_expansion - SystemExit: fontm...
FAILED tests/test_main.py::test_shared_features_ufo - SystemExit: fontmake: E...
FAILED tests/test_main.py::test_mti_sources - SystemExit: fontmake: Error: In...
FAILED tests/test_main.py::test_interpolate_layout - SystemExit: fontmake: Er...
FAILED tests/test_main.py::test_debug_feature_file - SystemExit: fontmake: Er...
FAILED tests/test_main.py::test_main_with_feature_writer_none - SystemExit: f...
FAILED tests/test_main.py::test_main_with_filter - SystemExit: fontmake: Erro...
FAILED tests/test_main.py::test_autohinting[autohint_options0] - SystemExit: ...
FAILED tests/test_main.py::test_autohinting[autohint_options1] - SystemExit: ...
FAILED tests/test_main.py::test_autohinting[autohint_options2] - SystemExit: ...
FAILED tests/test_main.py::test_autohinting[autohint_options3] - SystemExit: ...
FAILED tests/test_main.py::test_autohinting[autohint_options4] - SystemExit: ...
FAILED tests/test_main.py::test_main_designspace_v5_builds_STAT - SystemExit: 1
FAILED tests/test_main.py::test_main_designspace_v5_builds_all_vfs - SystemEx...
FAILED tests/test_main.py::test_main_designspace_v5_select_vfs_to_build - Sys...
FAILED tests/test_main.py::test_main_designspace_v5_can_use_output_path_with_1_vf
FAILED tests/test_main.py::test_main_designspace_v5_dont_interpolate_discrete_axis
FAILED tests/test_main.py::test_main_glyphspackage - SystemExit: fontmake: Er...
FAILED tests/test_main.py::test_timing_logger - subprocess.CalledProcessError...
FAILED tests/test_main.py::test_main_export_custom_ufo_structure[package-True]
FAILED tests/test_main.py::test_main_export_custom_ufo_structure[zip-True] - ...
============ 35 failed, 42 passed, 6 skipped, 9 warnings in 12.07s =============
E: pybuild pybuild:388: test: plugin distutils failed with: exit code=1: cd /home/atzlinux/devel/office/fontmake/.pybuild/cpython3_3.11/build; python3.11 -m pytest tests

[anthrotype]

the minimum required versions of fontmake (as with any python project) at any given time are listed in its setup.py's install_requires parameter.