may be I have missed something but I have tried to experiment with placeholders and I have found that it is not possible to use the folder placeholder separate from file placeholder. Only valid placeholder is two or more characters e.g. %Wm
I need to pre-process the latex file by lilypond-book program.
I'm using the post-processing commands because there are no pre-processing ones and I have switched off all LaTex processing on Profile window->La(Tex) tab.
Lilypond-book program generates the output to folder out (sub-folder of the working folder). Then I need the latex to start processing new .tex file in out directory. So I have add new post-processor running latex. Unfortunately the place holders doesn't allow me to do something like %W/out/%n.
Is it possible to have tokens like %W, %m and compose from it the rule for the input file of the post-processor?