Add definition for Sigstore's DSSE signature extension #178

	#
	# Copyright 2022 The Sigstore Authors.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	name: Check java build

	permissions:
	contents: read

	on:
	workflow_call: # allow this workflow to be called by other workflows
	push:
	paths:
	- '**.proto'
	- 'java/**'
	pull_request:
	paths:
	- '**.proto'
	- 'java/**'

	jobs:
	build:
	strategy:
	matrix:
	java-version: [8, 11, 17]
	fail-fast: false

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
	- name: Set up JDK ${{ matrix.java-version }}
	uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
	with:
	java-version: ${{ matrix.java-version }}
	distribution: 'temurin'

	# make sure jar generation works and tests/checks pass
	- name: Test
	uses: gradle/gradle-build-action@842c587ad8aa4c68eeba24c396e15af4c2e9f30a # v2.9.0
	with:
	arguments: build
	build-root-directory: java

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