(source: ValveSoftware/steam-for-linux#3671 (comment))
@TcM1911 Determining the path of the script being invoked, in a fully portable (w.r.t. platforms) and completely reliable manner, even in the face of symlinks, is a tricky problem and all too easy to get wrong. The only bullet proof way of doing it, of which I'm aware, is provided below (assumes bash); could be prepended to any script needing this functionality.
| #!/bin/bash | |
| script_path () { | |
| local scr_path="" | |
| local dir_path="" | |
| local sym_path="" | |
| # get (in a portable manner) the absolute path of the current script | |
| scr_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P) && scr_path=$scr_path/$(basename -- "$0") | |
| # if the path is a symlink resolve it recursively | |
| while [ -h $scr_path ]; do | |
| # 1) cd to directory of the symlink | |
| # 2) cd to the directory of where the symlink points | |
| # 3) get the pwd | |
| # 4) append the basename | |
| dir_path=$(dirname -- "$scr_path") | |
| sym_path=$(readlink $scr_path) | |
| scr_path=$(cd $dir_path && cd $(dirname -- "$sym_path") && pwd)/$(basename -- "$sym_path") | |
| done | |
| echo $scr_path | |
| } | |
| script_dir=$(dirname -- "$(script_path)") |