Moved build script out into its own file

Now I can run shellcheck on the bash :)

build.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+# Following variables are set via sed in the buildPhase step
+PREFIX=""
+# Intentionally overriding PATH so supressing shellcheck
+# shellcheck disable=SC2123
+PATH=""
+NERDFONTS=""
+
+DEBUG=false
+DIR=$(mktemp -d)
+RES=$(pwd)/alejandro_resume.pdf
+LOG=$(pwd)/alejandro_resume.log
+
+function usage {
+echo "Usage: $(basename "$0") [-h] [-d] [-e EMAIL] [-p PHONENUMBER]"
+echo '    -h              Prints this usage message.'
+echo ""
+echo '    -d              Saves latexmk log file (will be named alejandro_resume.log)'
+echo ""
+echo '    -e EMAIL        Sets email address used when building document.'
+echo '                    Can also be set with EMAIL environment variable.'
+echo ""
+echo '    -p PHONENUMBER  Sets phone number used when building the document.'
+echo '                    Can also be set with PHONENUMBER environment variable.'
+}
+
+while getopts ':de:p:h' flag; do
+case $flag in
+  'd') DEBUG=true;;
+  # Overrides EMAIL and PHONENUMBER envvars if set
+  'e') EMAIL="$OPTARG";;
+  'p') PHONENUMBER="$OPTARG";;
+  'h') usage && exit;;
+  ?) usage && exit 1;;
+esac
+done
+
+cd "$PREFIX"/share || exit 1
+mkdir -p "$DIR/.texcache/texmf-var"
+
+export EMAIL
+export PHONENUMBER
+
+# Set via sed in buildPhase (needs to be set after we have input values (e.g.
+# EMAIL and PHONENUMBER)
+TEXVARS=""
+
+env TEXFMHOME="$DIR/.texcache" TEXMFVAR="$DIR/.texcache/texmf-var" \
+  OSFONTDIR="$NERDFONTS"/share/fonts \
+latexmk -interaction=nonstopmode -pdf -lualatex \
+-output-directory="$DIR" \
+-pretex="$TEXVARS" \
+-usepretex alejandro_resume.tex
+
+mv "$DIR/alejandro_resume.pdf" "$RES"
+
+if $DEBUG; then
+mv "$DIR/alejandro_resume.log" "$LOG"
+fi
+
+rm -rf "$DIR"