#!/bin/bash
source_dir () {
#  USAGE
# will never source source .files or .directories
# all option arguments that contain globs/wildcards must be quoted to avoid expansion
# p option excludes additional paths below of the given name (and depth)
# d option sets the directory depth which is current directy by default, 0 is all
# x excludes file globs
# f inclucdes only file globs otherwise it's all except .files
# if no directory is given it will attempt to source the present working directory
# example:
# source_dir -p "archive" -x '"*.off" "*.md"'  -d 0 # $DIR/$SUBDIR
declare OPTION
declare OPTARG
declare OPTIND
local PATHS
local NAMES
local ENAMES
local DEPTH=1
local VERBOSE=0

while getopts 'p:d:x:f:' OPTION; do
case "$OPTION" in
  p)
    # PATHS=("$OPTARG")
    IFS=',' read -r -a PATHS <<< "$OPTARG"
    # echo EXCLUDING THESE PATHS ${PATHS[*]}
    ;;
  x)
    IFS=',' read -r -a ENAMES <<< "${OPTARG}"
    # echo EXCLUDING THESE FILE NAMES ${ENAMES[*]}
    ;;
  f)
    # NAMES=("$OPTARG")
    IFS=',' read -r -a NAMES <<< "${OPTARG}"
    # echo INCLUDING ONLY THESE FILE NAMES ${NAMES[*]}
    ;;
  d)
    DEPTH=$OPTARG
    # echo "SOURCING TO DEPTH (0=any)" "$DEPTH"
    ;;
  *)
    echo unknown option $OPTION
    ;;
esac
done

shift $(( OPTIND - 1 ))

local DIR
DIR="$@"
if [ ! "$DIR" ]; then
  if [ -v PS1 ]; then
  echo no directory to source provided
  echo sourcing present working directory $(pwd)
  read -p "Do you want to continue? " -n 1 -r
  [[ $REPLY =~ ^[Yy]$ ]] && DIR=$(pwd) || return 1
  else
    return 1
  fi
fi

[ ! -d "$DIR" ] && echo " directory $DIR does not exist, aborting" && return 1

# echo dir $DIR

local FIND
FIND="find $DIR"
FIND+=$([ ! $DEPTH == 0 ] && echo " -maxdepth $DEPTH ")
# ignore all .name and .path by default
# TODO change to having a string 
FIND+=" -type f ! -path \"*/.*/*\" ! -name \".*\" "


local name
local path

if [[ ${PATHS[0]} ]]; then
  for path in ${PATHS[@]}; do
     # echo excluding $path
     FIND+=$(echo ' ! -path "*/'$path'/*"')
  done
fi

if [[ ${ENAMES[0]} ]]; then
  for name in ${ENAMES[@]}; do
     # echo excluding name $name
     FIND+=$(echo " ! -name ${name}")
  done
fi

if [[ ${NAMES[0]} ]]; then
  for name in ${NAMES[@]}; do
     # echo only finding $name
     FIND+=$(echo " -name ${name}")
  done
fi

# echo
# echo find dir: $DIR
# echo find command: $FIND

local FILES
FILES=$(eval $FIND | sort)
# echo $FILES | xargs -n 1
  for f in $FILES; do
   # echo sourcing: $f
  . "$f"
done

}