define-alpine/setup.lua

local utils = require("utils")
local alpine = require("alpine")

local alpine_base_version = "3.16"
local alpine_version = alpine_base_version..".0"
local packages = {
	"alpine-baselayout",
	-- "alpine-conf",
	"apk-tools",
	"busybox",
	"libc-utils",
	"alpine-keys",
}
local mounts = {
	"tmpfs /tmp tmpfs defaults 0 0",
}
modules = {}

local root = "./root"

function add_packages(new_packages)
	utils.table_concat(packages, new_packages)
end
function add_mount(new_mount)
	table.insert(mounts, new_mount)
end
function add_file(path, content)
	utils.expect_nil(alpine.write_file(root, path, content))
end
function add_symlink(path, target)
	utils.expect_nil(alpine.symlink(root, path, target))
end
function chmod(path, perms)
	utils.expect_nil(alpine.chmod(root, path, perms))
end
function mkdir(path)
	utils.expect_nil(alpine.mkdir(root, path))
end

print("=> Initializing rootfs...")
utils.expect_nil(alpine.init_rootfs(root, alpine_base_version, alpine_version))

local function module(name)
	print("=> Module: " .. name)
	require("modules/" .. name)
end
module "kernel"
module "runit"

print("=> Writing fstab...")
add_file("/etc/fstab", utils.join_table(mounts, "\n"))
print("=> Installing and upgrading packages...")
utils.expect_nil(alpine.make_world(root, packages))
print("=> Setting password...")
utils.expect_nil(alpine.set_password(root, "root", "1"))
print("=> Moving boot...")
utils.expect_nil(alpine.move_boot(root))
print("=> Making image...")
utils.expect_nil(alpine.make_squashfs(root, "image.squashfs"))