Update #18

	name: build
	on:
	push:
	branches:
	- main
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: checkout repository
	uses: actions/checkout@v2
	- name: validate gradle wrapper
	uses: gradle/wrapper-validation-action@v1
	- name: setup jdk 8.0
	uses: actions/setup-java@v2
	with:
	distribution: adopt
	java-version: 8.0
	- name: make gradle wrapper executable
	run: chmod +x ./gradlew
	# 第一次构建
	- name: build
	id: build_1
	run: ./gradlew build
	# 第二次构建
	- name: build (retry 1)
	id: build_2
	if: steps.build_1.outcome == 'failure'
	run: ./gradlew build
	# 第三次构建
	- name: build (retry 2)
	id: build_3
	if: steps.build_2.outcome == 'failure'
	run: ./gradlew build
	# 第四次构建
	- name: build (retry 3)
	id: build_4
	if: steps.build_3.outcome == 'failure'
	run: ./gradlew build
	# 上传构建文件
	- name: capture build artifacts
	uses: actions/upload-artifact@v2
	with:
	name: Artifacts
	path: build/libs/

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