tex-template-builder/second-pass.lua

function fileExists(name)
    local f=io.open(name,"r")
    if f~=nil then io.close(f) return true else return false end
 end


local function countWords()
    local rawText = pandoc.pipe("pdftotext", {"output.pdf", "-"}, "")
    return pandoc.pipe("wc", {"-w"}, rawText)
end


return {
    {
      Meta = function(meta)
        if fileExists("output.pdf") then
            meta["wordcount"] = countWords()
            meta["secondpass"] = true
        end
        return meta
      end,
    }
}