#!/bin/sh

if [ ! $# = 1 ]; then
    printf >&2 "Usage: %s <path> [ext]\n" "$(basename "$0")"
    exit 0
fi

p="$1"
t="${2:-md}"

if [ ! -d "$p" ]; then
    printf >&2 "error: path %s not found\n" "$p"
    exit 1
fi

find "$p" -type f -name "*.$t" | while read -r file; do
    name="${file#"$p"}"
    name="${name#"/"}"
    name="${name%.*}"

    title="$(zs vars "$file" title)"
    if [ -z "$title" ]; then
        title="$name"
    fi

    echo "- [$title](${p}/${name}.html)"
done