export-layers.lua

--[[

Aseprite script to export all layers as sprite sheets.

]]

local spr = app.activeSprite

if not spr then
   return print('No active sprite')
end

local path,title = spr.filename:match("^(.+[/\\])(.-).([^.]*)$")

for i,layer in ipairs(spr.layers) do
   local fn = path .. title .. '-' .. layer.name

   -- Ignore layers starting with "xxx":
   if layer.name:find("^" .. "xxx") then
      goto continue
   end

   app.command.ExportSpriteSheet{
      ui=false,
      recent=false,
      askOverwrite=false,
      type=SpriteSheetType.HORIZONTAL,
      textureFilename=fn .. '.png',
      -- mergeDuplicates=true,
      layer=layer.name,
   }

   ::continue::
end