Make stwfsapy an optional dependency

[cbartz]

Closes #699

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (3451bd3) 99.63% compared to head (84fa56d) 99.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #700   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files          89       89           
  Lines        6222     6231    +9     
=======================================
+ Hits         6199     6208    +9     
  Misses         23       23           

Impacted Files	Coverage Δ
annif/backend/__init__.py	100.00% <100.00%> (ø)
tests/test_backend.py	100.00% <100.00%> (ø)
tests/test_backend_stwfsa.py	100.00% <100.00%> (ø)

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[juhoinkinen]

STWFSA should be added to be installed in the Docker image by adding it to the optional_dependencies variable in

Annif/Dockerfile

Line 5 in 3451bd3

ARG optional_dependencies="fasttext voikko fasttext nn omikuji yake spacy"

Otherwise looks good and ready to be merged. The missing test coverage could also be addressed (see the inline comment), but that's a minor thing.

(Annif Wiki needs to be modified to account for the changes, but that should be done when/after next Annif release is made, we should remember that.)

[juhoinkinen]

Test coverage could be extended to these lines by adding a test like

Annif/tests/test_backend.py

Lines 86 to 93 in 3451bd3

	@pytest.mark.skipif(
	importlib.util.find_spec("yake") is not None,
	reason="test requires that YAKE is NOT installed",
	)
	def test_get_backend_yake_not_installed():
	with pytest.raises(ValueError) as excinfo:
	annif.backend.get_backend("yake")
	assert "YAKE not available" in str(excinfo.value)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[juhoinkinen]

Thanks @cbartz! Merging this now.