#!/bin/bash

# export BASH_DEBUG=true
module_load debug
module_load iecho

isFile() {
    if [[ -f $1 ]]
    then
        echo "true"
        return 0
    else
        return 1
    fi
}

# find in any file
fif() {
grep -rnswl $1 -e $2 | more
}

build_file () {
  # local file
  # echo build file $1 $2
  # todo merge no cr
  [[ $1 == "-f" ]] && file=true && shift 1
  [[ -f "$2" ]] || { iecho "output file $2 does not exist"; return 1; }
  if [[ -f "$1" ]]; then
    # echo adding file $1 to $2
    [[ $file ]] && echo -e "\n####### ADDED $1 ########" >> $2
    # remove comment lines,  remove blank last line
    cat "$1" | sed '/^\s*#/d' | sed '/^$/{:a;N;s/\n$//;ta}' >> $2
    [[ ! $file ]] && echo -e "\n" >> $2
  else iecho "no such file $1 to append to $2"
  fi
}

# TODO need to test
function lines_2_str () {
  [[ ! -f "$1" ]] && return 1
  local str=''
  # echo the lines: $lines >&2
  # lines="$(cat "$1")"
  while read line; do
  [[ "$line" =~ ^[[:space:]]*# ]] && continue
    # echo line: "${line}" >&2
    str="$str ${line}"
   # echo str: $str >&2
  done < $1
  # for line in $lines ; do
  #    str+='"'$line'" '
  # done
  echo $str
}

prepend_file () {
  local tmp_fn
  # ---------------------------------------------------------------------------------------------------------------------- 
  # usage prepend_file <somefile> <anotherfile>
  # ---------------------------------------------------------------------------------------------------------------------- 
  # Prepend the contents of <somefile> [$1], to <anotherfile> [$2], leaving the result in <anotherfile> [$2].
  # insert a newline at the end of <somefile> [$1] if necessary
  # ---------------------------------------------------------------------------------------------------------------------- 
  debug prepend $1 to $2
  [[ -f $1 ]] || return 1
  [[ -f $2 ]] || return 2 

  #todo remove comments with flag

  tmp_fn=$( mktemp -t TEMP_FILE_prepend.XXXXXXXX )
  chmod 600 "$tmp_fn"
  awk '{print}' $1 $2 > $tmp_fn
  \mv "$tmp_fn" "$2"
  # remove temporary file
  rm -f "$tmp_fn"
  return 0

}

# change-ext() {
# local depth
# local d
# d=${3:-0}
# let d+=1
# [ $d -lt 1 ] && depth="" || depth=" -maxdepth $d "
# find . $depth -name '*.'$1 -exec rename -n 's/\.'$1'/.'$2'/' \{} \;
# read -p "do REALLY want to change the extensions? " -n 1 -r
# echo
# [[ ! $REPLY =~ ^[Yy]$ ]] && return 1
# find . $depth -name '*.'$1 -exec rename 's/\.'$1'/.'$2'/' \{} \;
# }

# alias chext=change-ext