A small tool for running something which outputs a list, making a selection based on those and saving the selection. Expects the output to be passed to fzf, uses bbolt as the database.

If you have the following configuration:

selectors:
  - action: readdir
    id: venv
    settings:
      on_select: source {{ .FullName }}/bin/activate.fish
    target:
      - ~/.local/share/venv

The only selector here is one with the id venv. When you run barn with no arguments, the contents of ~/.local/share/venv will be printed. When an arguments is provided a source command based on the selection is printed. If you put that in a script, you can use fzf to activate Python virtualenvs which will be sorted according to their usage frequency:

if test (count $argv) -eq 1
    set vst $argv[1]
else
    barn choose venv | fzf | read vst
    or return 1
end

eval (barn choose venv $vst)