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chore(deps): update dependency jsdom to v29 #6

	name: Fast-forward main

	# main is the static/default branch for GitHub UX and tools that assume a
	# stable default branch. It is not the integration target. On each push to the
	# configured active dev branch, fast-forward main to that commit.

	on:
	push:
	branches: ["**"]
	workflow_dispatch:

	permissions:
	contents: write

	concurrency:
	group: fast-forward-main-${{ github.repository }}
	cancel-in-progress: false

	defaults:
	run:
	shell: bash

	jobs:
	fast-forward:
	if: github.ref_type == 'branch'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Fast-forward main to active dev branch
	run: \|
	set -euo pipefail

	active_branch="$(tr -d '[:space:]' < support/ci/ACTIVE_DEV_BRANCH)"
	if [[ -z "${active_branch}" \|\| "${active_branch}" == "main" ]]; then
	echo "::error::support/ci/ACTIVE_DEV_BRANCH must name a non-main dev branch"
	exit 1
	fi

	if [[ "${GITHUB_REF_NAME}" != "${active_branch}" ]]; then
	echo "Push was to ${GITHUB_REF_NAME}; active dev branch is ${active_branch}. Nothing to do."
	exit 0
	fi

	if git ls-remote --exit-code --heads origin main >/dev/null 2>&1; then
	git fetch origin main
	if ! git merge-base --is-ancestor origin/main HEAD; then
	echo "::error::main has diverged from ${active_branch}; refusing non-fast-forward update"
	exit 1
	fi
	else
	echo "main does not exist yet; creating it at ${GITHUB_SHA}."
	fi

	git push origin "HEAD:refs/heads/main"