Install sbt in github actions #65

	name: CI

	on:
	push:
	tags:
	- '*'
	branches:
	- master
	- develop
	pull_request:

	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: coursier/cache-action@v6
	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11
	- name: Install sbt
	uses: sbt/setup-sbt@v1
	- name: Run tests
	run: sbt +test
	- name: Check Scala formatting
	if: ${{ always() }}
	run: sbt scalafmtCheckAll
	- name: Check assets can be published
	if: ${{ always() }}
	run: sbt +publishLocal
	- name: Check binary compatibility
	if: ${{ always() }}
	run: sbt +mimaReportBinaryIssues
	- name: Deploy to Maven Central
	if: startsWith(github.ref, 'refs/tags/')
	run: sbt ci-release
	env:
	PGP_PASSPHRASE: ${{ secrets.SONA_PGP_PASSPHRASE }}
	PGP_SECRET: ${{ secrets.SONA_PGP_SECRET }}
	SONATYPE_USERNAME: ${{ secrets.SONA_USER }}
	SONATYPE_PASSWORD: ${{ secrets.SONA_PASS }}
	- name: Publish ScalaDoc
	if: startsWith(github.ref, 'refs/tags/')
	run: \|
	project_version=$(sbt version -Dsbt.log.noformat=true \| perl -ne 'print "$1\n" if /info.(\d+\.\d+\.\d+[^\r\n])/' \| tail -n 1 \| tr -d '\n')
	if [[ "${{ github.ref }}" = "refs/tags/${project_version}" ]]
	then
	sbt "project docs" makeSite
	echo Publishing Scaladoc
	git fetch
	git checkout gh-pages
	cp -r docs/target/site/* .
	git config user.name "GitHub Actions"
	git config user.email "<>"
	git add $project_version
	git commit -m "Added Scaladoc for $project_version"
	git push origin gh-pages
	else
	echo "${{ github.ref }} does not match project version $project_version => not publishing"
	exit 1
	fi

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