shell-base/modules/scripting/helpers.lib

#!/bin/bash

str_after () {
echo "$1" | cut -s -d "${2:-=}" -f2 
}

str_before () {
echo "$1" | cut -s -d "${2:-=}" -f1 
}

# must be json as a string, depends on jq
get_prop_value () {
    local value
    # echo in $1 get $2
    value=$(echo $1 | jq -r .$2)
    echo $value
}

is_array() {
    local variable_name=$1
    [[ "$(declare -p $variable_name 2>/dev/null)" =~ "declare -a" ]]
}

is_function() {
    [[ $(type $1  2> /dev/null) ]] && echo $1 is a function
}

filename() {
    # passed entire path
    echo $(basename "$1" | rev | cut -f 2- -d '.' | rev)
}

fileext() {
    # passed entire path
    echo $1 | awk -F . '{print $NF}'
}

# // TODO remove and use path module
# // must change acl.lib and loginout, chromium, and ungoogled install files
adirname() {
    # passed entire path
    echo "$(cd "$(dirname "$1")" >/dev/null 2>&1 ; pwd -P )"
}

user_exists() {
    id -u $1 > /dev/null 2>&1
    [[ $? == 1 ]] || echo $1
    }


chmod_dirs() {
    # passed entire path
    local usesudo
    [[ $1 == -s ]] && usesudo="sudo" && shift 2
    $usesudo find $1 -type f -exec chmod $2 {} +
}

parse_option () {
  # usage: parse_option -f "-b one -p 22 -F another" -p
  # if -f is used then it will return the complete option
  # otherwise just the options value
  local opts;local f;local opt; local ret
  [[ $1 = "-f" ]] && { f=true;shift 1; }
  [[ ! $# -eq 2 ]] && return 1
  opts=$1
  opt=$2
#   echo $opts, $opt
  [[ ! $opts =~ $opt ]] && return 1
  ret=$(sed -n '/^.*'"$opt"'\s\+\(\w\+\).*$/s//\1/p' <<< $opts)
  [[ $f ]] && echo "$2 $ret" || echo $ret
}

# TODO: need to pass two arrays and then pass them back, see -r ret in ssh for example
# parse_extra_args () {
#   if [[ ! $* =~ "--" ]]; then     
#     debug $( ( IFS=$','; echo all arguments: "$*" ) )
#     for ((d=1; d<$#; ++d)); do
#     [[ ${!d} == "--" ]] && break
#     done
#     if [[ $d -lt $# ]]; then  # if there are extra ssh arguments
#       debug found -- at $d
#       opts=("${@:$d+1:$#}") 
#       debug $( ( IFS=$','; echo "ssh arguments: ${opts[*]}" ) )
#       # [[ ! ${sshargs[0]} ]] && { echo missing remote machine, must provide at least a hostname, -- hostname; return 3; }
#       ropts=("${@:1:$d-1}")
#       debug $( ( IFS=$','; echo "remaining arguments to parse: ${ropts[*]}" ) )
#     fi
#   fi    
# }

remove_empty_lines () {
if [[ -f $1 ]]; then cat $1; else echo "$1"; fi | sed -n '/^\s*$/!p'
# sed -rz 's/^\n+//; s/\n+$/\n/g'
}

remote_args () {
  local rargs  
  for i; do rargs="$rargs $(sed 's/ /\\ /g' <<< $i)"; done
  echo $rargs
}

remove_end_spaces () {
    del=${2:-\'}
    # echo delimiter: $del
    # sed -e 's/[[:space:]]\{1,\}$del/$del/' <<< "$1"
    res=$(sed -e 's/^$del[[:space:]]*/$del/' <<< "$1")
    sed -e 's/[[:space:]]*${del}$/$del/' <<< "$res"
}

# pass any sed ' ' string and comments lines will be ignored
# https://unix.stackexchange.com/a/301432/201387
# https://stackoverflow.com/a/35874420/4695378
sed_ignore_comments () {
    cmd="sed -r 'h;s/[^#]*//1;x;s/#.*//;${1};G;s/(.*)\n/\1/'"
    if (( $# == 2 )) ; then
        eval $cmd <<< "$2"
    else
        eval $cmd < /dev/stdin
    fi
}

compact_file () {
  # removes trailing spaces, blank lines and comments
#   echo -e "$1"
# grep -v '^\s*#' $1
[[ -f $1 ]] && sed -i -e '/^\s*#/d' -e '/^\s*$/d'  "$1"
#   if [[ -f "$1" ]]; then cat "$1"; else echo -e "$@"; fi | sed 's/\\s*$//g'  | sed -r '/^\s*$/d' | grep -v '^\s*#' 
}

mkrfilename () {
    echo ${2:-/tmp/}${1:-file}.$RANDOM
}



sshtest () {
 env | grep BASH    
 echo running on machine: $(hostnamectl hostname)
 echo as user:home $(whoami):$HOME   
 echo argument1 $1
 echo argument2 $2
 echo remaining arguments: "${@:3}"
 echo home directory listing
 ls -la ~
}

#rows between matched rows
# sed '1,/firstmatch/d;/secondmatch/,$d'

# this will escape ' for all lines having sed
# sed -i '/sed/s/\x27/\\'"'"'/g' $tmp_file