fish: Simplify fzf code

.config/fish/fzf.fish

@@ -7,7 +7,7 @@ bind \eC fzf-cd-widget
 function __fzf-select -d 'fzf commandline and print unescaped selection back to commandline'
 	set -l cmd (commandline -j)
 	[ "$cmd" ]; or return
-	eval $cmd | eval (__fzfcmd) -m --tac --tiebreak=index --toggle-sort=ctrl-r | string join ' ' | read -l result
+	eval $cmd | eval (__fzfcmd) -m --tac --tiebreak=index --toggle-sort=ctrl-r --select-1 --exit-0 | string join ' ' | read -l result
 	[ "$result" ]; and commandline -j -- $result
 	commandline -f repaint
 end
@@ -16,19 +16,7 @@ bind \e\cm __fzf-select
 function __fzf-complete -d 'fzf completion and print selection back to commandline'
 	set -l complist (complete -C(commandline -c))
 	set -l result
-	switch (count $complist)
-		case 0
-			return
-		case 1
-			set result (printf '%s' "$complist[1]" | cut -f1)
-		case '*'
-			string join -- \n $complist | sort | eval (__fzfcmd) -m --tac --tiebreak=index --toggle-sort=ctrl-r | cut -f1 | while read -l r; set result $result $r; end
-	end
-
-	if [ -z "$result" ]
-		commandline -f repaint
-		return
-	end
+	string join -- \n $complist | sort | eval (__fzfcmd) -m --tac --tiebreak=index --toggle-sort=ctrl-r --select-1 --exit-0 | cut -f1 | while read -l r; set result $result $r; end
 
 	for i in (seq (count $result))
 		set -l r $result[$i]
@@ -63,8 +51,7 @@ end
 
 ## Like original but uses last token as root for 'find'.
 ## If last token is a path, you can use it as $cwd in FZF_CTRL_T_COMMAND to
-## restrict search to this path. $cwd will be suppressed from commandline to
-## ensure clean output from the search results.
+## restrict search to this path.
 ## TODO: Report upstream. Makes '**' obsolete for bash and zsh.
 function fzf-file-widget
 	set -l cwd_esc (commandline -t)
@@ -81,21 +68,24 @@ function fzf-file-widget
 	-o -type l -print 2> /dev/null | sed 1d"
 
 	eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)" -m $FZF_CTRL_T_OPTS" | while read -l r; set result $result $r; end
-	if [ -n "$result" ]
-		if [ "$cwd" != . ]
-			## Remove last token from commandline.
-			commandline -t ""
-		end
-		for i in $result
-			commandline -it -- (string escape (eval "printf '%s' '$i'"))
-			commandline -it -- ' '
-		end
+	if [ -z "$result" ]
+		commandline -f repaint
+		return
+	end
+
+	if [ "$cwd" != . ]
+		## Remove last token from commandline.
+		commandline -t ""
+	end
+	for i in $result
+		commandline -it -- (string escape (eval "printf '%s' '$i'"))
+		commandline -it -- ' '
 	end
 	commandline -f repaint
 end
 
 function fzf-bcd-widget -d 'cd backwards'
-	pwd | nawk -v RS=/ '/\n/ {exit} {p=p $0 "/"; print p}' | eval (__fzfcmd) +m --tac | read -l result
+	pwd | nawk -v RS=/ '/\n/ {exit} {p=p $0 "/"; print p}' | eval (__fzfcmd) +m --tac --select-1 --exit-0 | read -l result
 	[ "$result" ]; and cd $result
 	commandline -f repaint
 end