How do you combine PDFs in ruby?

Question

This was asked in 2008. Hopefully there\'s a better answer now.

How can you combine PDFs in ruby?

I\'m using the pdf-stamper gem to fill out a form in a PDF.

Answer 1

Haven't seen great options in Ruby- I got best results shelling out to pdftk:

system "pdftk #{file_1} multistamp #{file_2} output #{file_combined}"

Answer 2

Use ghostscript to combine PDFs:

 options = "-q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite"
 system "gs #{options} -sOutputFile=result.pdf file1.pdf file2.pdf"