Replace Makefile with tox (#2331)

Porting notes:

- tox handles Python environments automatically. Remove a bit of PYTHONPATH
  manipulation (that was using Python 2 code which always failed!)

- No `clean` target: `git clean -xdf` should fit the bill.

- No `reindent` target: the `reindent.py` script it was using does not
  exist (anymore?).

- No equivalent of tox-test-coverage, which was an artifact of the past,
  using nose.  Instead, the test-coverage target only is ported, which
  uses pytest, and works.

1 files changed, 82 insertions, 4 deletions

diff --git a/tox.ini b/tox.ini
index 0de97559..1dcc73a7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,15 +1,93 @@
 [tox]
-envlist = py{37, 38, 39, 310, 311, 312}, lint
+envlist = py
 
 [testenv]
+description =
+  run tests with pytest (you can pass extra arguments for pytest,
+  e.g., "tox -- --update-goldens")
 deps =
-    pytest
+    pytest >= 7.0
     pytest-cov
+    pytest-randomly
     wcag-contrast-ratio
 commands = pytest {posargs}
+use_develop = True
 
-
-[testenv:lint]
+[testenv:regexlint]
+description =
+  lint regular expressions with regexlint
 deps =
     git+https://github.com/pygments/regexlint.git@master
 commands = regexlint pygments.lexers
+
+
+[testenv:pylint]
+description =
+  lint code with pylint
+deps =
+  pylint
+skip_install = True # doesn't need installing Pygments into the venv
+commands =
+  pylint --rcfile scripts/pylintrc pygments
+
+
+[testenv:check]
+description =
+  miscellaneous checks on the source code, including pyflakes
+deps =
+  flake8
+commands =
+  python scripts/check_crlf.py pygments external
+  python scripts/detect_missing_analyse_text.py --skip-no-aliases
+  # We only use pyflakes, not pycodestyle, but use it through flake8 nevertheless
+  # to be able to use the --ignore option.
+  flake8 --select F --ignore F401 pygments
+  python scripts/check_sources.py -i pygments/lexers/_mapping.py \
+        -i docs/_build -i pygments/formatters/_mapping.py -i pygments/unistring.py \
+        -i tests/support/empty.py
+  python scripts/count_token_references.py --minfiles=1 --maxfiles=1 \
+                                           --minlines=1 --maxlines=3 --subtoken
+
+[testenv:mapfiles]
+description =
+  regenerate map files
+deps =
+commands =
+  python scripts/gen_mapfiles.py
+
+
+[testenv:coverage]
+description =
+  run tests, and generate a coverage report in htmlcov/
+commands =
+  pytest --cov --cov-report=html --cov-report=term {posargs}
+
+
+[testenv:doc]
+description =
+  compile documentation with Sphinx. You can pass a builder name,
+  like "tox -e doc -- latex". You can also add extra options, like
+  "SPHINXOPTS='-D latex_paper_size=letter' tox -e doc -- latex".
+change_dir = doc
+deps =
+  sphinx
+  wcag-contrast-ratio
+commands =
+  sphinx-build -b {posargs:html} {env:SPHINXOPTS} . _build/{posargs:html}
+
+
+[testenv:web-doc]
+description =
+  same as doc, but also build the demo by compiling Pygments to WASM.
+change_dir = doc
+deps = {[testenv:doc]deps}
+allowlist_externals =
+  docker
+setenv =
+  # Enable the BuildKit backend to use the --output option.
+  DOCKER_BUILDKIT = 1
+  # Build the demo page.
+  WEBSITE_BUILD = 1
+commands =
+  docker build --file pyodide/Dockerfile --output _build/pyodide/pyodide ..
+  sphinx-build -b {posargs:html} {env:SPHINXOPTS} . _build/{posargs:html}