I am writing a replacement for \include that will only include the file if it has been modified. To do this I need to delete or extract files from a pdf. I am using lua to do all this.
I see there are some cmd line tools to do it: http://www.verypdf.com/wordpress/201112/delete-specified-pdf-pages-using-command-line-15756.html
But is there any easier way? Ultimately I would like to extract/copy only a subset of pages from a pdf to a new pdf rather than copy the whole file(which may be large) into another then delete the pages.
\includepdf[pages=...]to specify which pages to include. – Jake May 13 '12 at 20:42\includepdfwill only include the selected pages, not the whole PDF, so trimming is not required. Also it shouldn't be any issue to have two copies of the output PDF except if these are really large. – Martin Scharrer May 13 '12 at 21:23