ci.yml now updates README only if it's changed #31

# to view logs

	name: CI
	on:
	push:
	branches:
	- master
	jobs:
	release:
	if: "!contains(github.event.head_commit.message, 'skip ci')"
	name: Release
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Check if README.md has changed
	id: readme_check
	run: \|
	if git diff --name-only HEAD~1 HEAD \| grep -q "README.md"; then
	echo "README_CHANGED=true" >> $GITHUB_ENV
	else
	echo "README_CHANGED=false" >> $GITHUB_ENV
	fi

	- name: Update package README
	if: env.README_CHANGED == 'true'
	run: \|
	git branch -d upm &> /dev/null \|\| echo upm branch not found
	cp README.md "$PKG_ROOT/README.md"
	git config --global user.name 'github-bot'
	git config --global user.email 'github-bot@users.noreply.github.com'
	git commit -am "Updated package README from root README"
	git push -f -u origin master

	- name: Create UPM branch
	run: \|
	git subtree split -P "$PKG_ROOT" -b upm
	git checkout upm
	if [[ -d "Samples" ]]; then
	git mv Samples Samples~
	rm -f Samples.meta
	git config --global user.name 'github-bot'
	git config --global user.email 'github-bot@users.noreply.github.com'
	git commit -am "fix: Samples => Samples~"
	fi
	git push -f -u origin upm
	env:
	PKG_ROOT: "Assets/UniMic"

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