include file name in md pdf output

scripts/md-preamble.tex

@@ -2,4 +2,5 @@
 \pagestyle{fancy}
 \fancyhead{}
 \fancyhead[L]{CURRENTCOMMIT}
+\fancyfoot[L]{FILENAME}
 \AtBeginDocument{\renewcommand{\setminus}{\mathbin{\backslash}}}

scripts/pandoc-call.sh

 #! /usr/bin/env bash
+set -e
 infile="$1"
+baseinfile=$(basename "${infile}")
 outfile="${2:-$HOME/Desktop/pandoc.pdf}"
 headertext="$(git log -1 --format=%aI\ %h)"
 echo infile: $infile
@@ -8,5 +10,6 @@ echo headertext: $headertext
 mkdir -p .maindir/out
 cp .maindir/scripts/md-preamble.tex .maindir/out/md-preamble-orig.tex
 sed -i 's#CURRENTCOMMIT#'"${headertext}"'#' .maindir/scripts/md-preamble.tex
+sed -i 's#FILENAME#'"${baseinfile}"'#' .maindir/scripts/md-preamble.tex
 pandoc --pdf-engine lualatex --lua-filter .maindir/scripts/pandoc-gitlab-math.lua --include-in-header=.maindir/scripts/md-preamble.tex "${infile}" --output="${outfile}"
 cp .maindir/out/md-preamble-orig.tex .maindir/scripts/md-preamble.tex