#!/bin/bash

set -e
function helpexit() {
    echo Usage: $( basename "$0" ) source/ target/ [include] [[include]]
    echo Copy files with a glob inclusion, keeping folder structure.
    echo Example: fromfolder/  to/folder/ '*.jpg' '*.png'
    echo This command always
    echo '* recurses to folders!'
    echo '* overwrites existing files'
    exit
}

for ((i=1; i<=${#@}; i++)) {
    [[ "${!i}" = "-h" ]] && helpexit
    [[ "${!i}" = "--help" ]] && helpexit
}

if [[ -z "$3" ]]; then
  helpexit
fi

SRC="$1"
TGT="$2"

for ((i=3; i<=${#@}; i++)) {
    includes="$includes --include=\"${!i}\""
}

eval rsync -av --no-i-r --prune-empty-dirs \
    --include="*/" "$includes" --exclude="*" \
    "$SRC" "$TGT"