feat: adds github workflow to create an ironic esp image #1

	---
	name: build-ironic-esp-image

	on:
	workflow_dispatch:
	pull_request:
	paths:
	- 'ironic-images/**'
	push:
	branches:
	- main
	paths:
	- 'ironic-images/**'
	merge_group:
	types: [checks_requested]

	jobs:

	build:
	runs-on: ubuntu-latest

	steps:
	- name: Install Dependencies
	run: sudo apt update && sudo apt install -y grub-efi-amd64-signed shim-signed mtools

	- name: Create esp image
	run: \|
	cp /usr/lib/shim/shimx64.efi.signed /tmp/bootx64.efi
	cp /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed /tmp/grubx64.efi
	dd if=/dev/zero of=/tmp/esp.img bs=4096 count=1024
	mkfs.msdos -F 12 -n ESP_IMAGE /tmp/esp.img
	mmd -i /tmp/esp.img EFI EFI/BOOT
	mcopy -i /tmp/esp.img -v /tmp/bootx64.efi ::EFI/BOOT/BOOTX64.efi
	mcopy -i /tmp/esp.img -v /tmp/grubx64.efi ::EFI/BOOT/GRUBX64.efi
	mdir -i /tmp/esp.img ::EFI/BOOT

	- name: Set timestamp environment variable
	run: echo "TIMESTAMP=$(git show --no-patch --no-notes --pretty='%cd' --date=format:'%Y%m%d%H%M%S' ${{ github.sha }})" >> $GITHUB_ENV

	- name: Publish Release
	id: create_release
	uses: softprops/action-gh-release@e7a8f85e1c67a31e6ed99a94b41bd0b71bbee6b8 # v2
	with:
	name: understack-esp-images
	tag_name: understack-esp-images-${{ env.TIMESTAMP }}
	make_latest: true
	fail_on_unmatched_files: true
	files: /tmp/esp.img
	if: ${{ github.ref == 'refs/heads/main' }}

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