hide the legend when line series is empty #102

	name: test
	on:
	push:
	branches:
	- "main"
	- "release-*"
	pull_request:
	branches: [ main ]
	jobs:
	compile:
	name: Compile
	runs-on: ubuntu-latest
	timeout-minutes: 10
	steps:
	- name: Set up Go 1.x
	uses: actions/[email protected]
	with:
	go-version: "1.18"
	id: go
	- name: Check out code into the Go module directory
	uses: actions/checkout@v3
	- name: Restore Go build cache
	uses: actions/cache@v3
	with:
	path: ~/.cache/go-build
	key: ${{ runner.os }}-go-build-v1-${{ github.run_id }}
	- name: Get dependencies
	run: go mod download
	- name: build
	run: make
	test:
	name: Unit Test
	runs-on: ubuntu-latest
	timeout-minutes: 10
	env:
	GOPATH: /home/runner/go
	steps:
	- uses: actions/checkout@v3
	- name: Setup Golang
	uses: actions/[email protected]
	with:
	go-version: "1.18"
	- name: Restore Go build cache
	uses: actions/cache@v3
	with:
	path: ~/.cache/go-build
	key: ${{ runner.os }}-go-build-v1-${{ github.run_id }}
	- run: make test

	lint:
	name: Lint
	runs-on: ubuntu-latest
	timeout-minutes: 10
	env:
	GOPATH: /home/runner/go
	steps:
	- uses: actions/checkout@v3
	- name: Setup Golang
	uses: actions/[email protected]
	with:
	go-version: "1.18"
	- name: Restore Go build cache
	uses: actions/cache@v3
	with:
	path: ~/.cache/go-build
	key: ${{ runner.os }}-go-build-v1-${{ github.run_id }}
	- run: make lint
	- run: git diff --exit-code

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