Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During damage calculation (in either player's turn), if a Beast-Warrior-Type "Bujin" monster you control battles an opponent's monster: You can send this card from your hand to the Graveyard; the ATK of your monster becomes double its original ATK, during that damage calculation only.
--武神器－ハバキリ
--Bujingi Crane
local s,id=GetID()
function s.initial_effect(c)
	--Double ATK
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_PRE_DAMAGE_CALCULATE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.atkcon)
	e1:SetCost(Cost.SelfToGrave)
	e1:SetOperation(s.atkop)
	c:RegisterEffect(e1)
end
s.listed_series={SET_BUJIN}
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	local c=Duel.GetAttackTarget()
	if not c then return false end
	if c:IsControler(1-tp) then c=Duel.GetAttacker() end
	e:SetLabelObject(c)
	return c and c:IsSetCard(SET_BUJIN) and c:IsRace(RACE_BEASTWARRIOR) and c:IsRelateToBattle() and not c:IsAttack(c:GetBaseAttack()*2)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetLabelObject()
	if c:IsFaceup() and c:IsRelateToBattle() then
		--Its ATK becomes double its original ATK
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_DAMAGE_CAL)
		e1:SetValue(c:GetBaseAttack()*2)
		c:RegisterEffect(e1)
	end
end