Updated Makefile

* Now using 'latexmk' for creating the PDF
* Default values of MAIN and COMMIT are shown in help text

Makefile

@@ -1,29 +1,23 @@
 #COMMIT=HEAD^
-COMMIT=HEAD
-MAIN=test
+COMMIT := HEAD
+MAIN := test.tex
 
 .PHONY: pdf
 pdf:
-	pdflatex -interaction nonstopmode ${MAIN}
-	biber ${MAIN}
-	pdflatex -interaction nonstopmode ${MAIN}
-	makeglossaries ${MAIN}
-	pdflatex -interaction nonstopmode ${MAIN}
-	pdflatex -interaction nonstopmode ${MAIN}
+	latexmk -pdf ${MAIN}
 
 .PHONY: help
 help:
 	@echo "make pdf [MAIN=<main>]"
-	@echo "    Generate the PDF for the thesis. <main> defaults to 'main' and"
-	@echo "    refers to the base name of the main LaTeX file also called the"
-	@echo "    'jobname' in pdflatex)"
+	@echo "    Generate the PDF for the thesis. <main> defaults to '$(MAIN)'"
+	@echo "    and refers to the main LaTeX file"
 	@echo ""
 	@echo "make diff [COMMIT=hash] [MAIN=<main>]"
 	@echo "    Generate a PDF that shows the differences from the current"
 	@echo "    HEAD to the commit identified by its hash given as COMMIT."
-	@echo "    By default, COMMIT is 'HEAD^'"
+	@echo "    By default, COMMIT is '$(COMMIT)'"
 	@echo ""
 
 .PHONY: diff
 diff:
-	git latexdiff --run-biber --view --pdf-viewer evince --output diff.pdf --main ${MAIN}.tex --ignore-makefile --ignore-latex-errors ${COMMIT} --
+	git latexdiff --run-biber --view --pdf-viewer evince --output diff.pdf --main ${MAIN} --ignore-latex-errors ${COMMIT} --