xif: complete command

xif

@@ -1,37 +1,53 @@
 #!/bin/sh
+# vim: set ts=4 sw=4 et:
 
-[ -z "$@" ] && echo "xif: empty search term" && exit 1
+command -v fzf >/dev/null || sudo xbps-install -S fzf
+
+[ -z "$*" ] && echo "xif: empty search term" && exit 1
 
 filter='/^.[i*]. /d'
 filter1='s/^...\? //'
 filter2='s/-[^- ]* / /'
 
-# when available, use xrs(1)
-# fallback to xbps-query -Rs
 XRS="xbps-query -Rs"
 command -v xrs >/dev/null && XRS="xrs"
-# when available, use xi(1)
-# fallback to xbps-install
 XI="xbps-install"
 command -v xi >/dev/null && XI="xi"
 
+which_sudo() {
+    if [ "$(id -u)" = "0" ]; then
+        return
+    elif command -v sudo >/dev/null && sudo -l | grep -q -e ' ALL$' -e xbps-install; then
+        echo sudo
+    elif command -v doas >/dev/null && [ -f /etc/doas.conf ]; then
+        echo doas
+    else
+        echo su
+    fi
+}
+
 install() {
-    sudo $XI "$@"
+    echo "xif: $SUDO $XI $@"
+    echo
+    $SUDO $XI $@
 }
 
 pkgs() {
-    $XRS "$@" | sed "$filter;$filter1;$filter2" | fzf --layout=reverse -m |\
+    echo $@ | tr ' ' '\n' | xargs -i $XRS {} | uniq |\
+        sed "$filter;$filter1;$filter2" | fzf --layout=reverse -m |\
         cut -d' ' -f1 | tr '\n' ' ' | sed "s/ $//"
 }
 
-PKGS="$(pkgs "$@")"
-[ -z $PKGS ] && exit 130
+PKGS="$(pkgs $@)"
+[ -z "$PKGS" ] && exit 130
+
+SUDO=$(which_sudo)
+install -S $PKGS
 
-install -S "$PKGS"
 status=$?
 if [ $status -eq 16 ]; then
     install -u xbps &&
-    install -S $(pkgs "$@")
+    install -S $PKGS
 else
     exit $status
 fi