Setting up a pipeline

pyproject.toml

@@ -0,0 +1,32 @@
+[tool.ruff]
+line-length = 120
+target-version = "py311"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "W"]
+ignore = [
+    "E501", # symbolic-math expressions routinely exceed a "normal" line length
+]
+
+[tool.ruff.lint.per-file-ignores]
+# *.sage.py is generated by `sage --preparse` from *.sage sources.
+# - F403/F405/F821/E741: Sage's runtime injects hundreds of globals (ZZ, var,
+#   matrix, LatticePolytope, ...) via `from sage.all import *` before
+#   executing these files, so plain static analysis can't see where names
+#   come from.
+# - E402/E702/I001: Sage's preparser itself emits an import-then-semicolon-
+#   joined-constants preamble (e.g. `_sage_const_1 = Integer(1); ...`) ahead
+#   of the file's own imports; that's Sage's boilerplate, not this project's
+#   code style.
+# - W291/W293: the preparser replaces every integer literal with
+#   `_sage_const_N ` (trailing space included) to preserve token boundaries,
+#   so trailing-whitespace warnings fire mechanically on almost every line
+#   with a number in it -- not something `ruff format` could fix anyway,
+#   since it wouldn't change the .sage source that generated it.
+"*.sage.py" = ["F403", "F405", "F821", "E741", "E402", "E702", "I001", "W291", "W293"]
+
+# tests/test_smoke.py does `from sage.all import *` and `load(...)` a .sage
+# file to get at its classes -- the same dynamic-namespace situation as
+# *.sage.py above, just in a hand-written file: ruff can't see that
+# Polytope/ToricPolytope/etc. come from the loaded file.
+"tests/test_smoke.py" = ["F403", "F405"]