GraphViz not present in Docker image

[almereyda]

When trying to render the dot output directly through the Docker image, it complaines about a missing dependency:

root@panda ~/.tmp # docker run --rm -v /var/run/docker.sock:/var/run/docker.sock:ro -v ${PWD}:/usr/src/app/.tmp leoverto/docker-network-graph -o .tmp/panda.svg                      
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/graphviz/backend.py", line 164, in run
    proc = subprocess.Popen(cmd, startupinfo=get_startupinfo(), **kwargs)
  File "/usr/local/lib/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/local/lib/python3.9/subprocess.py", line 1821, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'dot'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/app/docker-net-graph.py", line 211, in <module>
    generate_graph(args.verbose, args.out)
  File "/usr/src/app/docker-net-graph.py", line 193, in generate_graph
    g.render(base)
  File "/usr/local/lib/python3.9/site-packages/graphviz/files.py", line 243, in render
    rendered = backend.render(self._engine, format, filepath,
  File "/usr/local/lib/python3.9/site-packages/graphviz/backend.py", line 223, in render
    run(cmd, capture_output=True, cwd=cwd, check=True, quiet=quiet)
  File "/usr/local/lib/python3.9/site-packages/graphviz/backend.py", line 167, in run
    raise ExecutableNotFound(cmd)
graphviz.backend.ExecutableNotFound: failed to execute ['dot', '-Ksfdp', '-Tsvg', '-O', 'panda'], make sure the Graphviz executables are on your systems' PATH

[mct-dev]

I get the same problem without using the docker image. Just followed the git clone steps.

❯ pipenv run python docker-net-graph.py -o output.svg

Traceback (most recent call last):
  File "/Users/miketobias/.local/share/virtualenvs/docker-network-graph-uwAAFihC/lib/python3.9/site-packages/graphviz/backend.py", line 164, in run
    proc = subprocess.Popen(cmd, startupinfo=get_startupinfo(), **kwargs)
  File "/opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 1821, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'dot'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/miketobias/git/LeoVerto/docker-network-graph/docker-net-graph.py", line 211, in <module>
    generate_graph(args.verbose, args.out)
  File "/Users/miketobias/git/LeoVerto/docker-network-graph/docker-net-graph.py", line 193, in generate_graph
    g.render(base)
  File "/Users/miketobias/.local/share/virtualenvs/docker-network-graph-uwAAFihC/lib/python3.9/site-packages/graphviz/files.py", line 243, in render
    rendered = backend.render(self._engine, format, filepath,
  File "/Users/miketobias/.local/share/virtualenvs/docker-network-graph-uwAAFihC/lib/python3.9/site-packages/graphviz/backend.py", line 223, in render
    run(cmd, capture_output=True, cwd=cwd, check=True, quiet=quiet)
  File "/Users/miketobias/.local/share/virtualenvs/docker-network-graph-uwAAFihC/lib/python3.9/site-packages/graphviz/backend.py", line 167, in run
    raise ExecutableNotFound(cmd)
graphviz.backend.ExecutableNotFound: failed to execute ['dot', '-Ksfdp', '-Tsvg', '-O', 'output'], make sure the Graphviz executables are on your systems' PATH

However, I was not able to replicate the problem via the docker command. I received the expected output and was able to paste it into the site linked in the README to see my graph.