CNF - A "command not found" for toolbx users

This repository contains a "command not found" utility aimed (primarily) at toolbox users. Currently, it will:

Forward commands not found on the host to a configurable toolbox via toolbox run
Forward commands not found in a toolbox to the host via flatpak-spawn --host

This process can be invoked by explicitly calling the cnf executable, or implicitly/automatically by hooking into your shell (currently supports bash and zsh). Refer to the output of cnf --hooks bash/zsh for further information.

Installation

If you want to automatically run cnf whenever a specific command isn't found, you must perform the following one-time setup:

# If you're using bash
$ cnf --hooks bash >> ~/.bashrc
# Likewise for zsh
$ cnf --hooks zsh >> ~/.zshrc

If you don't know which shell you're currently using, the output of the following command should tell you:

basename $(readlink -f /proc/$$/exe)

Now restart your shell or open a new shell tab/window and try it out!

Configuration

When you run this command for the first time, it will create a default configuration file in ~/.config/cnf/cnf.toml. The options should be self-explanatory.

CNF and sudo

When running commands with sudo, you will realize that the default "command not found" text is displayed. That is because sudo performs its own executable lookups, and if it can't find the command you were asking it to execute, it will print this error and exit. There are two ways to "fix" this:

The manual method

You directly call cnf with the command line that sudo couldn't find, like this:

$ sudo foobar
sudo: foobar: command not found
$ cnf !!

The !! will be expanded by your shell to the last command you executed, verbatim, including all of its arguments. This way you're forwarding the command to cnf directly. In other words: You're doing the shell hooks job, but manually.

The automatic method

Replacing your sudo executable happens at your own responsibility. Please be very careful with this, as of currently this program has undergone minimal testing.

Copy (or link) the utils/sudo from this repository to some location on your $PATH, like $HOME/.local/bin.

cp utils/sudo ~/.local/bin/
# Or link it like this:
# ln -s $PWD/utils/sudo ~/.local/bin/sudo