#!/run/current-system/sw/bin/bash

# Check if:
#   default.nix
#   default.yaml
#   header.tex
#   Makefile
#   slides.md
# exists
# if not, copy from templates

BEAMERTEMP="/path/to/your/templates/beamer"

SLIDES="slides.md"

TODAY=$(date +%F)

check_and_copy () {
    if test -f $1
    then
        echo "Using current $1"
    else
        echo "Creating $1"
        cp "$BEAMERTEMP/$1" $1

        # set slides date to today
        if [ $1 == $SLIDES ]
        then
            sed -i "s/^date:.*$/date: $TODAY/" $SLIDES
        fi
    fi
}

check_and_copy "default.nix"
check_and_copy "default.yaml"
check_and_copy "header.tex"
check_and_copy "Makefile"
check_and_copy $SLIDES