fish-shell/share/functions/man.fish

function man --description "Format and display the on-line manual pages"

	# Work around the "builtin" manpage that everything symlinks to,
	# by prepending our fish datadir to man. This also ensures that man gives fish's
	# man pages priority, without having to put fish's bin directories first in $PATH

	# Notice local but exported variable
	set -lx MANPATH (string join : $MANPATH)
	if test -z "$MANPATH"
		type -q manpath; and set MANPATH (command manpath)
	end
	set -l fish_manpath (dirname $__fish_datadir)/fish/man
	if test -d "$fish_manpath" -a -n "$MANPATH"
		set MANPATH "$fish_manpath":$MANPATH

		# Invoke man with this manpath, and we're done
		command man $argv
		return
	end
	
	# If fish's man pages could not be found, just invoke man normally
	command man $argv
end