I am trying to configure some external commands in Gedit3, for compiling LaTeX files. All works well, except for the following. I have a LaTeX document, consisting of many parts. Each file begins with
% mainfile: name_of_main_file.tex
So in bash I'm trying to extract the first line of each file, and from that line extract
name_of_main_file.tex and compile that. So the question is: what is the quickest way of extracting
name_of_main_file.tex, loading it into a variable, say
$MAINFILE, so that then I can compile that?