How to set path in STY file as relative to this file path

Question

I need to write several documents (mainBook1.tex, mainBook2.tex,..), all with the same layout. So basically I moved all common settings to outer file (baseSettings.sty) extension, which is pleaced in other path from docs main TeX files. See my files tree:

 +-Documents
   +-Base
   | +-baseSettings.sty
   | +-BaseImages
   |   +-headerImage.jpg
   |   +-footerImage.jpg
   +-Book1
   | +-mainBook1.tex
   +-Book2
     +-mainBook2.tex 

mainBook1.tex:

\documentclass[12pt]{article}
\usepackage{import}
\usepackage{../Base/baseSettings}
\begin{document}
...

baseSettings.sty:

\ProvidesPackage{baseSettings}
\usepackage{geometry}
\newgeometry{margin=2.0cm, bottom=3.5cm, top=2.5cm}
\usepackage{...}
% HEADER AND FOOTER:
\rhead{\includegraphics[scale=0.3]{BaseImages/headerImage.jpg}}
\rfoot{\includegraphics[scale=0.2,valign=c]{BaseImages/footerImage.jpg}}
...

And problem is, that those .jpg files cant be found. If I move folder BaseImages into Book1 folder, everything works fine. But I would like to have base images stored only once.

So the question is: How to set those paths in .sty file as relative from this file?

I use: MiKTeX with TeXworks. I just press the Typeset button to create PDFs – I'm not familiar wih all the magic behind.

Is it possible to compile it with command?

Answer 1

You should never use a path with \usepackage just use \usepackage{baseSettings} and it's usually more portable to omit the path from \includegraphics as well, so \includegraphics[scale=0.3]{headerImage} then just arrange that Base// is in the tex input path and any files anywhere below that will be found.

 TEXINPUTS=Base//: pdflatex mainBook1

would work for example if you have a bash or similar command line, but normally you would set the default TEXINPUTS elsewhere.