Merge pull request #6 from DSACMS/nat/additions #3

	on:
	push:
	branches:
	- main
	workflow_dispatch:

	jobs:
	populate-repo-structure:
	runs-on: ubuntu-latest
	name: Update repo structure in README.md
	permissions:
	contents: write
	pull-requests: write
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Populate repository structure with tree command
	# https://stackoverflow.com/questions/29613304/is-it-possible-to-escape-regex-metacharacters-reliably-with-sed
	# https://stackoverflow.com/questions/407523/escape-a-string-for-a-sed-replace-pattern
	run: \|
	quoteSubst() {
	IFS= read -d '' -r < <(sed -e ':a' -e '$!{N;ba' -e '}' -e 's/[&/\]/\\&/g; s/\n/\\&/g' <<<"$1")
	printf %s "${REPLY%$'\n'}"
	}
	TREE_OUTPUT=$(tree -d)
	sed -i 's/<!--TREE START--><!--TREE END-->/\n```plaintext\n'"$(quoteSubst $TREE_OUTPUT)"'\n```\n/g' README.md

	- name: Commit and push changes
	# https://github.com/orgs/community/discussions/26560#discussioncomment-3531273
	# commit changes, but if no changes exist, then exit cleanly
	run: \|
	git config user.name 'github-actions[bot]'
	git config user.email 'github-actions[bot]@users.noreply.github.com'
	git add README.md
	git commit -m "BOT: Update repo structure in README.md" \|\| exit 0
	git push

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