Am 09.12.2014 18:09, schrieb Federico Bruni:
2014-12-09 17:57 GMT+01:00 Urs Liska <u...@openlilylib.org <mailto:u...@openlilylib.org>>:Am 09.12.2014 17:47, schrieb Federico Bruni:2014-12-09 17:38 GMT+01:00 Urs Liska <u...@openlilylib.org <mailto:u...@openlilylib.org>>: Hi all, if I produce scores that are to be printed on double-sided, folded sheets (i.e. four A4 pages on one A3 sheet) I need to find a way to add empty pages to the end of the score. I have one bookpart with two pages of front matter, then comes the score. Then I need that flexible amount of 0-3 empty pages, finally I have a last bookpart for the back cover. How can I determine the number of pages a score has and add an appropriate number of pages to that? (2 + 5 + N + 1) % 4 = 0 Examples: Score has 5 pages: -> 0 empty pages necessary Score has 7 pages: -> 2 empty pages necessary You don't want to do this in LilyPond, right? If so, you already replied to yourself. I did the same five years ago and the recommendation in this list was: work on A4 in LilyPond and use some external tool (can't remember which) to build the A3 pdf file. You already have the "pseudo code" to create that pdf.Well, I don't want to do the imposition from within LilyPond, but I'd like to produce the score files directly from within LilyPond without having to run them through LaTeX first. So I want to produce files with a number of pages that can be divided by four, and where the second-to-last page(s) are automatically inserted to make that possible. This was the thread (4 years ago actually): http://lists.gnu.org/archive/html/lilypond-user/2010-12/msg00484.html pdfnup or pdfbook (both in package texlive-extra-utils in debian) some use adobe reader but I guess that you'll prefer command line tools
OK, now I've read through that thread, and it's *not* the same issue, at least it's another aspect of the overall issue.
What *I* would need is a way to tell the first page number a given bookpart starts with. If I had this I could write a function that calculates the right number of page breaks to insert.
Urs
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