From 80072b291f8572798ae170aa1baaec58af9fa6d2 Mon Sep 17 00:00:00 2001
From: Julian Piribauer <julian.piribauer@gmail.com>
Date: Sun, 26 Jul 2026 14:42:06 +0200
Subject: [PATCH] Ignore EOF blank line check

---
 .gitea/preparse.sh      | 15 +++++++++++++++
 .gitea/workflows/ci.yml |  7 +------
 pyproject.toml          |  5 ++++-
 3 files changed, 20 insertions(+), 7 deletions(-)
 create mode 100755 .gitea/preparse.sh

diff --git a/.gitea/preparse.sh b/.gitea/preparse.sh
new file mode 100755
index 0000000..13c706f
--- /dev/null
+++ b/.gitea/preparse.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Reproduces the CI "Preparse .sage files" step locally, so `ruff check` sees
+# the same generated *.sage.py files that the pipeline lints. Run this before
+# `sage --python -m ruff check --no-respect-gitignore .` to catch issues that
+# only show up in the generated output (e.g. missing trailing newlines).
+#
+# The generated files are gitignored; clean them up afterwards with:
+#   git clean -x sage/ playground/
+
+set -e
+
+for f in $(find . -name "*.sage" -not -path "./playground/*"); do
+  sage --preparse "$f"
+  printf 'from sage.all import *  # noqa: F401,F403\n%s\n' "$(cat "${f}.py")" > "${f}.py"
+done
diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 655193e..4c89a0d 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -24,12 +24,7 @@ jobs:
         # parse it, and prepends the `from sage.all import *` that `sage`
         # normally injects at runtime, so Sage's globals (ZZ, var, matrix, ...)
         # resolve instead of looking like undefined names.
-        run: |
-          set -e
-          for f in $(find . -name "*.sage" -not -path "./playground/*"); do
-            sage --preparse "$f"
-            printf 'from sage.all import *  # noqa: F401,F403\n%s\n' "$(cat "${f}.py")" > "${f}.py"
-          done
+        run: .gitea/preparse.sh
 
       - name: ruff check
         # --no-respect-gitignore: *.sage.py is gitignored (it's generated, see
diff --git a/pyproject.toml b/pyproject.toml
index 4659824..d9ee759 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,10 @@ ignore = [
 #   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"]
+# - W292: whether the reconstructed file ends in a real trailing newline
+#   depends on how many blank lines the preparser appends, which varies by
+#   Sage version -- not something worth pinning tool versions over.
+"*.sage.py" = ["F403", "F405", "F821", "E741", "E402", "E702", "I001", "W291", "W293", "W292"]
 
 # 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