Use pytest.hookimpl/.hookspec to configure hooks

See
pytest-dev/pytest#9118
https://docs.pytest.org/en/latest/deprecations.html#configuring-hook-specs-impls-using-markers

Closes #223

Author: The-Compiler

AUTHORS.rst

@@ -32,3 +32,4 @@ Authors
 * Dimitris Rozakis - https://github.com/dimrozakis
 * Friedrich Delgado - https://github.com/TauPan
 * Sam James - https://github.com/thesamesam
+* Florian Bruhin - https://github.com/The-Compiler

CHANGELOG.rst

@@ -6,6 +6,9 @@ Changelog
 ------------------
 * Fix skipping test in `test_utils.py` if appropriate VCS not available. Also fix typo.
   Contributed by Sam James in `#211 <https://github.com/ionelmc/pytest-benchmark/pull/211>`_.
+* Use ``pytest.hookimpl`` and ``pytest.hookspec`` to configure hooks,
+  avoiding a deprecation warning in the upcoming pytest 7.2.0.
+  Contributed by Florian Bruhin in `#224 <https://github.com/ionelmc/pytest-benchmark/pull/224>`_.
 
 3.4.2 (2021-06-15)
 ------------------

src/pytest_benchmark/hookspec.py

@@ -1,3 +1,6 @@
+import pytest
+
+@pytest.hookspec(firstresult=True)
 def pytest_benchmark_scale_unit(config, unit, benchmarks, best, worst, sort):
     """
     To have custom time scaling do something like this:
@@ -19,6 +22,7 @@ def pytest_benchmark_scale_unit(config, unit, benchmarks, best, worst, sort):
     pass
 
 
+@pytest.hookspec(firstresult=True)
 def pytest_benchmark_generate_machine_info(config):
     """
     To completely replace the generated machine_info do something like this:
@@ -45,6 +49,7 @@ def pytest_benchmark_update_machine_info(config, machine_info):
     pass
 
 
+@pytest.hookspec(firstresult=True)
 def pytest_benchmark_generate_commit_info(config):
     """
     To completely replace the generated commit_info do something like this:
@@ -69,6 +74,7 @@ def pytest_benchmark_update_commit_info(config, commit_info):
     pass
 
 
+@pytest.hookspec(firstresult=True)
 def pytest_benchmark_group_stats(config, benchmarks, group_by):
     """
     You may perform grouping customization here, in case the builtin grouping doesn't suit you.
@@ -90,6 +96,7 @@ def pytest_benchmark_group_stats(config, benchmarks, group_by):
     pass
 
 
+@pytest.hookspec(firstresult=True)
 def pytest_benchmark_generate_json(config, benchmarks, include_data, machine_info, commit_info):
     """
     You should read pytest-benchmark's code if you really need to wholly customize the json.
@@ -143,10 +150,3 @@ def pytest_benchmark_compare_machine_info(config, benchmarksession, machine_info
             )
     """
     pass
-
-
-pytest_benchmark_scale_unit.firstresult = True
-pytest_benchmark_generate_commit_info.firstresult = True
-pytest_benchmark_generate_json.firstresult = True
-pytest_benchmark_generate_machine_info.firstresult = True
-pytest_benchmark_group_stats.firstresult = True

src/pytest_benchmark/plugin.py

@@ -434,7 +434,7 @@ def pytest_runtest_makereport(item, call):
         fixture.skipped = outcome.get_result().outcome == 'skipped'
 
 
-@pytest.mark.trylast  # force the other plugins to initialise, fixes issue with capture not being properly initialised
+@pytest.hookimpl(trylast=True)  # force the other plugins to initialise, fixes issue with capture not being properly initialised
 def pytest_configure(config):
     config.addinivalue_line("markers", "benchmark: mark a test with custom benchmark settings.")
     bs = config._benchmarksession = BenchmarkSession(config)