Apply release only changes to core (pytorch#109208)

Utility script to run after branch cut have been completed.
Execute: ``RELEASE_VERSION=2.1 apply-release-changes.sh``
Similar to: pytorch/audio#3590

Test PR: pytorch#109210

Automate generation of PRs:
pytorch#108053
pytorch#108688
pytorch#108064

Pull Request resolved: pytorch#109208
Approved by: https://github.com/seemethere

Author: atalman

scripts/release/apply-release-changes.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+#
+# Usage (run from root of project):
+#  RELEASE_VERSION=2.1 apply-release-changes.sh
+#
+# RELEASE_VERSION: Version of this current release
+
+set -eou pipefail
+
+# Create and Check out to Release Branch
+# git checkout -b "${RELEASE_BRANCH}"
+
+# Change all GitHub Actions to reference the test-infra release branch
+# as opposed to main.
+echo "Applying to workflows"
+for i in .github/workflows/*.yml; do
+    sed -i -e s#@main#@"release/${RELEASE_VERSION}"# $i;
+done
+
+# Change all checkout step in templates to not add ref to checkout
+echo "Applying to templates"
+for i in .github/templates/*.yml.j2; do
+    sed -i 's#common.checkout(\(.*\))#common.checkout(\1, checkout_pr_head=False)#' $i;
+done
+# Change conda token for test env for conda upload
+sed -i 's#CONDA_PYTORCHBOT_TOKEN#CONDA_PYTORCHBOT_TOKEN_TEST#' .github/templates/upload.yml.j2
+
+# Triton wheel
+echo "Triton Changes"
+sed -i -e s#-\ main#"-\ release\/${RELEASE_VERSION}"# .github/workflows/build-triton-wheel.yml
+
+# XLA related changes
+echo "XLA Changes"
+sed -i -e s#--quiet#-b\ r"${RELEASE_VERSION}"# .ci/pytorch/common_utils.sh
+sed -i -e s#.*#r"${RELEASE_VERSION}"# .github/ci_commit_pins/xla.txt
+
+# Binary tests
+echo "Binary tests"
+sed -i 's#/nightly/#/test/#' .circleci/scripts/binary_linux_test.sh
+sed -i 's#"\\${PYTORCH_CHANNEL}"#pytorch-test#' .circleci/scripts/binary_linux_test.sh
+
+# Regenerated templates
+./.github/regenerate.sh
+
+# Optional
+# git commit -m "[RELEASE-ONLY CHANGES] Branch Cut for Release {RELEASE_VERSION}"
+# git push origin "${RELEASE_BRANCH}"