require "../backends.cr"

# FIXME: Where should this go? We can’t just leave it here. :(
def pkginfo(package)
	du = `du -sk #{package.fake_root_directory}`
	size = du.sub(/[ \t].*/, "").to_i * 1024

	lines = [] of String

	lines << "# Generated by `package`."
	lines << "pkgname = #{package.name}"
	lines << "pkgver = #{package.version}-r#{package.release}"
	lines << "url = #{package.url || ""} "
	lines << "size = #{size}"
	lines << "origin = #{package.recipe.name}"
	lines << "buildtype = host" # This’ll need to be imported from Context.
	lines << "builddate = #{Time.utc.to_unix}"

	package.dependencies.each do |atom|
		lines << "depend = #{atom.to_s}"
	end

	package.provides.each do |atom|
		lines << "provides = #{atom.to_s}"
	end

	package.conflicts.each do |atom|
		lines << "conflicts = #{atom.to_s}"
	end

	lines.join("\n") + "\n"
end

class ApkBackend < Package::Backend::Packaging
	def initialize
		@name = "apk"
	end

	def package(context : Package::Context, package : Package::Package) : Bool
		# FIXME: This needs to have access to architecture (from Context?)
		#        to work properly.
		old_cwd = Dir.current

		File.write "#{package.fake_root_directory}/.PKGINFO", pkginfo package

		# Create data.tar.gz here.
		package_target = "#{context.packages_directory}/#{context.architecture}/#{package.name}-#{package.version}-r#{package.release}.apk"
		Dir.mkdir_p File.dirname package_target

		# FIXME: This shouldn’t have to be in users’ PATH. libexec?
		r = context.run package.fake_root_directory, "#{OWN_LIBEXEC_DIR}/assemble-apk.sh", [
			package_target
		]

		r.exit_status == 0
	end
end