shell-base/modules/scripting/helpers.mod

#!/bin/bash
# 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)
}

# // 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; }
  [[ $1 && $2 ]] || return 1
  opts=$1
  opt=$2
  [[ ! $opts =~ "$opt" ]] && return 1
  ret=$(sed -n "/^.*$opt\s\+\(\w\+\).*$/s//\1/p" <<< $opts)
  [[ $f ]] && echo "$2 $ret" || echo $ret
}

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

# pass any sed ' ' string and command 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
}


# https://stackoverflow.com/questions/19331497/set-environment-variables-from-file-of-key-value-pairs
env_file () {
   env=${1:-.env}
   [[ -f "${env}" ]] && { echo $env; return 0; } # || echo not $env
   [[ -f "${env}.env" ]] && { echo "${env}.env"; return 0; } # || echo not ${env}.env
   [[ -f "${env}/.env" ]] && { echo "${env}/.env"; return 0; } # || echo not ${env}/.env
   return 1
}  
  
# ignore non assignment lines
list_env_file_vars () {
  env=$(env_file $1)
  [[ ! $env ]] && { iecho "Env file ${1} doesn't exist"; return 1; }
  echo $(grep -v '^#' ${env} | sed -n -E 's/(.*)=[^ =].*/\1/p' | xargs)
}

list_env_file_vals() {
   vars=$(list_env_file_vars $1)
   [[ $? -gt 0 ]] && return 1
   for var in $(list_env_file_vars $1) ;
   do
   echo "$var=${!var}"
   done
}

source_env_file() {
  env=$(env_file $1)
  [[ ! $env ]] && { iecho "Env file ${1} doesn't exist"; return 1; }
  source $env
}

export_env_file () {
  env=$(env_file $1)
  [[ ! $env ]] && { iecho "Env file ${1} doesn't exist"; return 1; }
  set -a; source $env; set +a
}

unset_env_file () {
  env=$(env_file $1)
  [[ ! $env ]] && { iecho "Env file ${1} doesn't exist"; return 1; }
  unset $(grep -v '^#' ${env} | sed -E 's/(.*)=.*/\1/' | xargs)
}