From 1c94116e9f9d5cca3ce940c9808b632d4d3db99a Mon Sep 17 00:00:00 2001
From: epernod <erik.pernod@gmail.com>
Date: Mon, 5 Oct 2026 16:09:10 +0200
Subject: [PATCH 1/4] up python version

---
 .github/workflows/ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 52e4bd8..04bf16b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -191,7 +191,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: '3.13'
 
       - name: Install dependencies
         shell: bash

From 4b83bbc205c402868e19ea80c7f95b619d1e94ff Mon Sep 17 00:00:00 2001
From: epernod <erik.pernod@gmail.com>
Date: Wed, 14 Oct 2026 11:43:23 +0200
Subject: [PATCH 2/4] up python version to match the SOFA one

---
 .github/workflows/ci.yml | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 04bf16b..ab3c57b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -188,10 +188,25 @@ jobs:
           echo "LD_LIBRARY_PATH=$LP:${LD_LIBRARY_PATH:-}" >> $GITHUB_ENV
 
       #######################   Setup Python   #######################
+      # SofaPython3's compiled modules only load in the exact python version SOFA
+      # was built against (ABI tag in their filename: cpython-312 / cp312), so read
+      # it from the binaries instead of hardcoding it.
+      - name: Detect SOFA python version
+        id: pyver
+        shell: bash
+        run: |
+          set -euo pipefail
+          SP="$SOFA_ROOT/plugins/SofaPython3/lib/python3/site-packages/Sofa"
+          TAG=$(ls "$SP" | grep -oE '^Helper\.(cpython-|cp)3[0-9]+' | grep -oE '3[0-9]+$' | head -n1)
+          [[ -n "$TAG" ]] || { echo "::error::Could not detect python ABI tag from $SP"; ls -la "$SP"; exit 1; }
+          VERSION="3.${TAG:1}"
+          echo "SOFA was built against python $VERSION"
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: ${{ steps.pyver.outputs.version }}
 
       - name: Install dependencies
         shell: bash

From e0b2a53ebe3d7207eab41d9fe5c6a8045c393554 Mon Sep 17 00:00:00 2001
From: epernod <erik.pernod@gmail.com>
Date: Wed, 14 Oct 2026 12:06:29 +0200
Subject: [PATCH 3/4] log issue

---
 .github/workflows/ci.yml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ab3c57b..b12ed05 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -246,6 +246,11 @@ jobs:
 
       - name: Run regression
         shell: bash
+        env:
+          # The regression program captures each scene's output with
+          # subprocess.run(text=True), which decodes with the locale encoding:
+          # cp1252 on Windows, which chokes on SOFA's UTF-8 logs.
+          PYTHONUTF8: '1'
         run: |
           set -euo pipefail
           cd "$WORKSPACE_SRC_PATH"

From 5745e162324bca7835235a6b55de946203411e82 Mon Sep 17 00:00:00 2001
From: erik pernod <erik.pernod@gmail.com>
Date: Wed, 14 Oct 2026 14:45:35 +0200
Subject: [PATCH 4/4] Clarify Python version detection in CI workflow

Updated comment to clarify detection of Python version.
---
 .github/workflows/ci.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b12ed05..fc00783 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -188,9 +188,7 @@ jobs:
           echo "LD_LIBRARY_PATH=$LP:${LD_LIBRARY_PATH:-}" >> $GITHUB_ENV
 
       #######################   Setup Python   #######################
-      # SofaPython3's compiled modules only load in the exact python version SOFA
-      # was built against (ABI tag in their filename: cpython-312 / cp312), so read
-      # it from the binaries instead of hardcoding it.
+      # detect python version from SOFA binaries instead of hardcoding it.
       - name: Detect SOFA python version
         id: pyver
         shell: bash