Build: Rename sdist to lowercase

Different build tools produce different case.
This is important because stupid PyPI doesn't ignore sdists
in different cases but also doesn't allow uploading.
So we use single case, all lower. Also see PEP 625.

[skip ci]

ANNOUNCE.rst

@@ -48,6 +48,12 @@ CI:
 
   - CI(GHActions): Run tests under Python 3.13.
 
+Build/release:
+
+  - Rename sdist to lowercase; different build tools produce different case.
+    This is important because stupid PyPI doesn't ignore sdists
+    in different cases but also doesn't allow uploading.
+    So we use single case, all lower. Also see PEP 625.
 
 
 What is CheetahTemplate3

LATEST-CHANGES.rst

@@ -38,3 +38,10 @@ CI:
   - CI(GHActions): Switch to ``setup-miniconda``.
 
   - CI(GHActions): Run tests under Python 3.13.
+
+Build/release:
+
+  - Rename sdist to lowercase; different build tools produce different case.
+    This is important because stupid PyPI doesn't ignore sdists
+    in different cases but also doesn't allow uploading.
+    So we use single case, all lower. Also see PEP 625.

devscripts/CI/ghactions-release

@@ -13,13 +13,13 @@ v=$(echo "$py" | sed 's/\.//')
 
 pip install -U pip setuptools readme-renderer twine wheel
 python setup.py sdist
-if [ -f dist/ct3-*.tar.gz ]; then
-    # Rename sdist to uppercase; different build tools produce different case.
+if [ -f dist/CT3-*.tar.gz ]; then
+    # Rename sdist to lowercase; different build tools produce different case.
     # This is important because stupid PyPI doesn't ignore sdists
     # in different cases but also doesn't allow uploading.
-    # So we use single case, all upper.
+    # So we use single case, all lower. Also see PEP 625.
     cd dist
-    mv ct3-*.tar.gz "`echo ct3-*.tar.gz | sed 's/^ct3-/CT3-/'`"
+    mv CT3-*.tar.gz "`echo CT3-*.tar.gz | sed 's/^CT3-/ct3-/'`"
     cd ..
 fi
 

docs/news.rst

@@ -45,6 +45,13 @@ CI:
 
   - CI(GHActions): Run tests under Python 3.13.
 
+Build/release:
+
+  - Rename sdist to lowercase; different build tools produce different case.
+    This is important because stupid PyPI doesn't ignore sdists
+    in different cases but also doesn't allow uploading.
+    So we use single case, all lower. Also see PEP 625.
+
 3.3.3.post1 (2024-02-28)
 ------------------------