Bash function to transform any Unix/Windows path to absolute Unix path

abs_path.bash

abs_path(){
# Transforms any path, including windows paths, given as parameter, to absolute path.
# Expands ~, ~-, \  etc.
# Exitcode: 0 (output to stdout) if path exists, 1 (outout to stderr) otherwise.

  local path="${1}"
# Windows to Unix path [if operand is Unix path, then wslpath outputs to stderr]
  local buffer=$(wslpath -u "${path}" 2>/dev/null); path="${buffer:-"${path}"}"
  eval path="${path}"  # Remove backslash, Tilde expansion etc.
  [[ "${path}" != /* ]] && path="${PWD}/${path}"
  [[ -e "${path}" ]] && echo "${path}" && return 0
  echo "${path}" >&2 && return 1 
}

########################## Testing #######################
# Source this file as: . ./abs_path.bash
# Bash command: abs_path <drag-&-drop any file/directory from *nix/WSL/Windows here or type whatever you fancy>
# echo $?