add tofu auto-deployment workflows #15

	name: Apply OpenTofu plan

	on:
	workflow_dispatch: # manual trigger
	push:
	branches:
	- main

	permissions:
	contents: read
	pull-requests: write

	jobs:
	apply:
	runs-on: ubuntu-latest
	name: Apply pre-prepared plan
	env:
	GITHUB_TOKEN: ${{ secrets.TF_GITHUB_TOKEN }}

	NOMAD_ADDR: ${{ vars.NOMAD_ADDR }}
	NOMAD_TOKEN: ${{ secrets.NOMAD_TOKEN }}

	# to access state db
	AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
	AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}

	# dflook/tofu-* actions run inside a debian:bullseye container,
	# so we cannot use another action to prep the environment
	TERRAFORM_PRE_RUN: \|
	# install nix
	curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix \| sh -s -- install linux --no-confirm --init none
	. /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
	ln -s $(which nix) /bin/nix

	# allow accessing host-owned repo files inside container
	git config --global --add safe.directory '*'

	steps:
	- name: checkout
	uses: actions/checkout@v4

	- name: add ssh key
	uses: webfactory/[email protected]
	with:
	ssh-private-key: ${{ secrets.TF_SSH_PRIVATE_KEY }}

	- name: tofu apply
	uses: dflook/[email protected]
	with:
	label: dsekt-infra
	variables: \|
	hcloud_token = "${{ secrets.TF_HCLOUD_TOKEN }}"
	cloudflare_api_token = "${{ secrets.TF_CLOUDFLARE_TOKEN }}"
	ssh_user = "${{ vars.TF_SSH_USER }}"

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