Migrate BACKPORT_BRANCH from file to versions.yml

Co-authored-by: leofang <5534781+leofang@users.noreply.github.com>

Author: Copilot

.github/BACKPORT_BRANCH

@@ -28,7 +28,7 @@ jobs:
       - name: Load branch name
         id: get-branch
         run: |
-          OLD_BRANCH=$(cat .github/BACKPORT_BRANCH)
+          OLD_BRANCH=$(yq '.backport_branch' ci/versions.yml)
           echo "OLD_BRANCH=${OLD_BRANCH}" >> $GITHUB_ENV
 
       - name: Create backport pull requests

.github/workflows/backport.yml

@@ -350,7 +350,7 @@ jobs:
             && apt install gh -y
           fi
 
-          OLD_BRANCH=$(cat .github/BACKPORT_BRANCH)
+          OLD_BRANCH=$(yq '.backport_branch' ci/versions.yml)
           OLD_BASENAME="cuda-bindings-python${PYTHON_VERSION_FORMATTED}-cuda*-${{ inputs.host-platform }}*"
           LATEST_PRIOR_RUN_ID=$(gh run list -b ${OLD_BRANCH} -L 1 -w "ci.yml" -s completed -R NVIDIA/cuda-python --json databaseId | jq '.[]| .databaseId')
           if [[ "$LATEST_PRIOR_RUN_ID" == "" ]]; then

.github/workflows/build-wheel.yml

@@ -147,7 +147,7 @@ jobs:
           && apt update \
           && apt install gh -y
 
-          OLD_BRANCH=$(cat .github/BACKPORT_BRANCH)
+          OLD_BRANCH=$(yq '.backport_branch' ci/versions.yml)
           OLD_BASENAME="cuda-bindings-python${PYTHON_VERSION_FORMATTED}-cuda*-${{ inputs.host-platform }}*"
           LATEST_PRIOR_RUN_ID=$(gh run list -b ${OLD_BRANCH} -L 1 -w "ci.yml" -s completed -R NVIDIA/cuda-python --json databaseId | jq '.[]| .databaseId')
           if [[ "$LATEST_PRIOR_RUN_ID" == "" ]]; then

.github/workflows/test-wheel-linux.yml

@@ -145,7 +145,7 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          $OLD_BRANCH = Get-Content .github/BACKPORT_BRANCH
+          $OLD_BRANCH = yq '.backport_branch' ci/versions.yml
           $OLD_BASENAME = "cuda-bindings-python${env:PYTHON_VERSION_FORMATTED}-cuda*-${{ inputs.host-platform }}*"
           $runData = gh run list -b $OLD_BRANCH -L 1 -w "ci.yml" -s completed -R NVIDIA/cuda-python --json databaseId | ConvertFrom-Json
           if (-not $runData -or $runData.Length -eq 0 -or -not $runData[0].databaseId -or [string]::IsNullOrEmpty($runData[0].databaseId)) {

.github/workflows/test-wheel-windows.yml

@@ -5,7 +5,6 @@ LICENSE
 *.png
 .gitattributes
 .gitignore
-.github/BACKPORT_BRANCH
 requirements*.txt
 cuda_bindings/examples/*
 

.spdx-ignore

@@ -1,6 +1,8 @@
 # SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+backport_branch: "12.9.x"
+
 cuda:
   build:
     version: "13.0.2"