#!/bin/bash
USAGE="save.sh [-v (verbose)] list_files_to_save root_path_to_save"
[ "$1" == "-h" ] && echo "$USAGE" && exit 0
[ "$1" == "-v" ] && VERBOSE="v" && shift
LIST_TO_SAVE=${LIST_TO_SAVE:-list_to_save}
[ -z "$TARGET_PATH" ] && echo "TARGET_PATH not defined in enviroment" && exit 1
[ -n "$1" ]  && [ -r "$1" ] && LIST_TO_SAVE=$1 
[ -n "$2" ]  && [ -r "$2" ] && TARGET_PATH=$2

[ ! -d "$TARGET_PATH" ] && echo "$TARGET_PATH for root save not found" && exit 1
# A manual method scanning path to get files
# Alternative method in one line: 
#  $(find "." -type f | grep -v "target/" | grep -v .git)
get_list() {
  local path
  for it in "$1"/??*
  do
    [[ "$it" =~ /node_modules ]] && continue  
    [[ "$it" =~ /target ]] && continue  
    [[ "$it" =~ /.git ]] && continue  
    if [ -d "$it" ] ; then 
      get_list "$it"
    else 
      # Avoid use of sed (shellcheck SC2001)
      path="${it//"$ROOT_PATH"//}"
      # If no files in this path so copy path itself
      [ "$(basename "$path")" == "??*" ] && path=$(dirname "$path")
      echo "${path//\.\//}"
    fi
  done
  # scan hidden files  
  for it in "$1"/.??*
  do
    [[ "$it" =~ /.git ]] && continue  
    [ "$(basename "$it")" == ".??*" ] && continue
    echo "${it//\.\//}"
  done
}
WK_FILE="/tmp/save.$$"
if [ ! -r "$LIST_TO_SAVE" ] ; then 
  echo "$LIST_TO_SAVE not defined"
  echo "Using default list no 'target' no 'node_modules' no '.git'"
  get_list "." > "$WK_FILE"
  LIST="$WK_FILE"
else 
  LIST="$LIST_TO_SAVE"
fi

DEBUG=${DEBUG:-0}

now_is=$(date +%Y_%m_%d_%H%M%S)

SRC_PATH=$(basename "$PWD")
TARGET=$TARGET_PATH/$SRC_PATH"_$now_is.tar.gz"

echo "---------------------------" 
line_info="$(wc -l "$LIST" | cut -f1 -d"/" | tr -d " " ) files"
[ -z "$VERBOSE" ] && echo "Saving $line_info ..."
if tar cz"$VERBOSE"f "$TARGET" --files-from "$LIST" ; then 
  [ -n "$VERBOSE" ] && echo -e "\n$line_info saved !"
  echo -e "\nDone save $SRC_PATH to $TARGET" 
fi
echo "---------------------------" 
rm -f "$WK_FILE"