Basically overleaf

launch.sh

#!/usr/bin/env bash

trap "kill 0" SIGINT

HOST=$(cut -d':' -f1 <<<$1)
TEX_PATH=$(cut -d':' -f2 <<<$1)

DIR=`dirname $TEX_PATH`
FILE=`basename $TEX_PATH`

PDF="${FILE/tex/pdf}"

# Script that compiles the LaTeX file on change
SCRIPT=$(<<'EOF'
cd "$DIR"
CHECKSUM=$(cksum "$FILE");
while true;
    do if [ \"$(cksum $FILE )\" != \"CHECKSUM\" ]; then
        pdflatex -interaction -nonstopmode -file-line-error "$FILE" > /dev/null;
        CHECKSUM=$(cksum "$FILE");
    else sleep 0.1;
    fi;
done;
EOF
)

# Execute the script on the target machine
( ssh $HOST $SCRIPT ) &

# Copy back the compiled pdf
( while true; do rsync -cz "$HOST:$DIR/$PDF" . 2> /dev/null; sleep 0.5; done ) &

ssh $HOST
kill 0