New convenience function: load library

[felipecrs]

This function is supposed to load a library file (source lib.sh) relative to the script's current folder and properly deal with the errors, such as not being able to find the library file.

Something like this:

function load_lib() {
  local lib_file=$1
  # shellcheck disable=SC1090
  source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/$lib_file" || die "[ERROR] Not able to load the library $lib_file"
}

laod_lib "../common.sh"
load_lib "lib.sh"

With the template:

# DEFINE_LOAD_LIB

[matejak]

Thanks for the suggestion, I will look into it.