fish-shell/share/completions/j.fish

function __history_completions
	set -l tokens (commandline --current-process --tokenize)
	history --prefix (commandline) | string replace -r \^$tokens[1]\\s\* ""
end

complete -k -c j -a '(__history_completions)' -f
Add history-based completions for autojump's j command j does not have any "logical" source of completions, but it almost often called with arguments that have been seen before (since it is used to jump to favorite/recent directories). We can search the history for possible completions and use those. This is an example of the behavior mentioned in #4344 as a possible enhancement for fish 3.0, where completions can be provided from history if none are otherwise found. 2017-09-21 09:50:10 +08:00			`function __history_completions`
			`set -l tokens (commandline --current-process --tokenize)`
			`history --prefix (commandline) \| string replace -r \^$tokens[1]\\s\* ""`
			`end`

			`complete -k -c j -a '(__history_completions)' -f`