Merge branch 'main' of https://github.com/ms609/TreeTools #76

	name: Update CSL file
	on:
	schedule:
	- cron: '0 0 * * 1' # Runs weekly on Monday at 00:00 UTC
	workflow_dispatch:
	push:
	branches:
	- main
	paths:
	- '.github/workflows/update-csl.yml'

	jobs:
	update-csl:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v6

	- name: Download latest CSL file
	run: \|
	curl -L -f -o inst/apa-old-doi-prefix.csl https://raw.githubusercontent.com/citation-style-language/styles/master/apa.csl

	- name: Validate download
	run: \|
	python3 -c "import xml.etree.ElementTree as ET; ET.parse('inst/apa-old-doi-prefix.csl')" \|\| { echo "Invalid XML detected"; exit 1; }

	- name: Check for changes
	id: changes
	run: \|
	if git diff --quiet inst/apa-old-doi-prefix.csl; then
	echo "changed=false" >> "$GITHUB_OUTPUT"
	echo "No changes to commit"
	else
	echo "changed=true" >> "$GITHUB_OUTPUT"
	echo "Changes detected"
	fi

	- name: Commit and push
	if: steps.changes.outputs.changed == 'true'
	run: \|
	git config --local user.email "actions@github.com"
	git config --local user.name "GitHub Actions"
	git add inst/apa-old-doi-prefix.csl
	git commit -m "Update CSL file from upstream"
	git push

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