Use Makefile instead of shell script.

assets/images/logo/Makefile

+.PHONY: all clean
+
+all: dlogo.svg dlogo_hover.svg dfavicon.svg dbkgd.png dbkgd_ws.png
+	make clean
+
+clean:
+	rm -rf *.pdf *.log *.aux auto
+
+clean-all: clean
+	rm -rf *.svg *.png
+
+dlogo.svg: dlogo.tex
+	pdflatex -shell-escape dlogo.tex
+
+dlogo_hover.svg: dlogo_hover.tex
+	pdflatex -shell-escape dlogo_hover.tex
+
+dfavicon.svg: dfavicon.tex
+	pdflatex -shell-escape dfavicon.tex
+
+dbkgd.png: dbkgd.tex
+	pdflatex -shell-escape dbkgd.tex
+
+dbkgd_ws.png: dbkgd_ws.tex dbkgd-header.tex dbkgd-curves.tex
+	pdflatex -shell-escape dbkgd_ws.tex

assets/images/logo/makelogo.sh

-#!/bin/sh
-pdflatex -shell-escape dlogo.tex
-pdflatex -shell-escape dlogo_hover.tex
-pdflatex -shell-escape dfavicon.tex
-pdflatex -shell-escape dbkgd.tex