bugfix: Unable to find "/usr/sbin/neato" when adding binary and data …

[jan-fuchs-fuky]

…files.

Problem on Debian GNU/Linux 11 (bullseye) and Ubuntu 22.04.1 LTS:

In : os.path.realpath(shutil.which("dot"))
Out: '/usr/sbin/libgvc6-config-update'

In : os.path.dirname(os.path.realpath(shutil.which("dot")))
Out: '/usr/sbin'

Solution:

In : os.path.dirname(shutil.which("dot"))
Out: '/usr/bin'

[bwoodsend]

Indeed, dot is a symlink so we want to collect the file it points to but still call it dot.

root@924c75cb9e42:/# stat /usr/bin/dot                   
  File: /usr/bin/dot -> ../sbin/libgvc6-config-update

The comment just above however points out that on macOS, you need to resolve the symlink to get to the real graphviz installation hiding in homebrew's cellar.

[rokm]

For the executables, wouldn't it be safer if we just resolved each and every one using shutil.which instead of trying to resolve their directory and collecting them from it?