piTarget.lua

-- trigger (status): INK_PI_TARGET_CHANGED, READY_CHECK
function(event)
    local macroName = "Void Eruption"
    local macroBody = GetMacroBody(macroName)
    local targetBegin, targetEnd = string.find(macroBody, "@[^@]+,nodead")
    targetBegin = targetBegin + 1
    targetEnd = targetEnd - 7

    local target = string.sub(macroBody, targetBegin, targetEnd)
    local targetGuid = UnitGUID(target)

    if targetGuid == nil or string.sub(targetGuid, 1, 6) ~= "Player" then
        if event == "READY_CHECK" then
            WeakAuras.ScanEvents("INK_NO_PI_TARGET")
        end

        return false
    end

    aura_env.targetGuid = targetGuid
    WeakAuras.ScanEvents("INK_PI_TARGET_VALID")

    return true
end

-- untrigger
function()
    return true
end

-- name
function(event)
    return aura_env.targetGuid
end

--[[
Macro to set the PI target:
```
local t=GetUnitName("target", true)
if t ~= nil then
    local n="Void Eruption"
    local m=GetMacroBody(n)
    m=string.gsub(m, "@[^@]+,nodead", "@"..t..",nodead")
    EditMacro(n,n,nil,m)
    WeakAuras.ScanEvents("INK_PI_TARGET_CHANGED")
end
```

Sample "Void Eruption" macro:
```
#showtooltip
/stopmacro [channeling:Void Torrent][noharm][noform:1]
/cast [known:Void Eruption]Void Eruption;Dark Ascension
/use item:193773
/cast [@Moxbob-BleedingHollow,nodead]Power Infusion
/cast Vampiric Embrace
/cast Void Bolt
```
]]