added native tox support to pyproject.toml

pyproject.toml

@@ -156,3 +156,42 @@ module = [
     "borg.platform.*",
 ]
 ignore_missing_imports = true
+
+[tool.tox]
+requires = ["tox>=4.19", "pkgconfig", "cython", "wheel", "setuptools_scm"]
+env_list = ["py{310,311,312,313}-{none,fuse2,fuse3}", "docs", "ruff", "mypy"]
+
+[tool.tox.env_run_base]
+package = "editable-legacy"  # without this it does not find setup_docs when running under fakeroot
+deps = ["-rrequirements.d/development.txt"]
+commands = [["pytest", "-v", "-n", "{env:XDISTN:1}", "-rs", "--cov=borg", "--cov-config=.coveragerc", "--benchmark-skip", "--pyargs", "{posargs:borg.testsuite}"]]
+pass_env = ["*"]  # fakeroot -u needs some env vars
+
+[tool.tox.env_pkg_base]
+pass_env = ["*"]  # needed by tox4, so env vars are visible for building borg
+
+# Environment-specific configurations
+[tool.tox.env."py{310,311,312,313}-fuse2"]
+set_env = {BORG_FUSE_IMPL = "llfuse"}
+deps = ["-rrequirements.d/development.txt", "llfuse"]
+
+[tool.tox.env."py{310,311,312,313}-fuse3"]
+set_env = {BORG_FUSE_IMPL = "pyfuse3"}
+deps = ["-rrequirements.d/development.txt", "pyfuse3"]
+
+[tool.tox.env."py{310,311,312,313}-none"]
+deps = ["-rrequirements.d/development.txt"]
+
+[tool.tox.env.ruff]
+skip_install = true
+deps = ["ruff"]
+commands = [["ruff", "check", "."]]
+
+[tool.tox.env.mypy]
+deps = ["pytest", "mypy", "pkgconfig"]
+commands = [["mypy", "--ignore-missing-imports"]]
+
+[tool.tox.env.docs]
+change_dir = "docs"
+deps = ["sphinx", "sphinxcontrib-jquery", "guzzle_sphinx_theme"]
+commands = [["sphinx-build", "-n", "-v", "-W", "--keep-going", "-b", "html", "-d", "{envtmpdir}/doctrees", ".", "{envtmpdir}/html"]]