Add body #4

	on:
	push:
	tags:
	- 'v*'

	name: Publish Amalgamated Code

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: cargo install cpp-amalgamate
	run: cargo install cpp-amalgamate
	- name: cpp-amalgamate
	run: \|
	rm -f amalgamated.hpp
	cpp-amalgamate ./src/** >> amalgamated.hpp
	# create new release
	- name: Create Release
	id: create_release
	uses: actions/create-release@v1
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	with:
	tag_name: ${{ github.ref }}
	release_name: Release ${{ github.ref }}
	body: \|
	You can find the amalgamated code in the file `amalgamated.hpp`.
	draft: false
	prerelease: false
	# upload amalgamated code
	- name: Upload Release Asset
	id: upload-release-asset
	uses: actions/upload-release-asset@v1
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	with:
	upload_url: ${{ steps.create_release.outputs.upload_url }}
	asset_path: ./amalgamated.hpp
	asset_name: amalgamated.hpp
	asset_content_type: text/plain

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