Monday, March 30, 2009

Combining PDFs with Ruby in OS X

I recently had to write a fairly complex script using Ruby to match-up and combine PDF documents. I thought I'd share the command I used to do the PDF work as I matched up the files. It uses an automator action that comes default in OS X Leopard.

Here's the relevant code snippet:

filepath1 = folder1 + "/" + filename1
filepath2 = folder2 + "/" + filename2
outfilepath = folder3 + "/" + filename3

command = "python '/System/Library/Automator/Combine PDF Pages.action/Contents/Resources/' -o '" + outfilepath + "' '" + filepath2 + "' '" + filepath1 + "'"

`#{ command }`

I think you can see how it works with that much code. It currently is complaining about a deprecated call somewhere in the automator action, but it doesn't affect the outcome, and it will hopefully go away in a future release.