Add checkdeps.sh

checkdeps.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Check whether deps exists in AUR or repos of Arch.
+# Do NOT abuse this since it consumes extra bandwidth from AUR server.
+
+cd "$(dirname "$0")"
+export base="$(pwd)"
+source ./scriptdata/functions
+source ./scriptdata/installers
+
+pkglistfile=$(mktemp)
+pkglistfile_orig=./scriptdata/dependencies.txt
+cat $pkglistfile_orig | sed "s_\ _\n_g" > $pkglistfile
+
+echo "The non-existent pkgs in $pkglistfile_orig are listed as follows."
+# Borrowed from https://bbs.archlinux.org/viewtopic.php?pid=1490795#p1490795
+comm -23 <(sort -u $pkglistfile) <(sort -u <(wget -q -O - https://aur.archlinux.org/packages.gz | gunzip) <(pacman -Ssq))
+echo "End. If nothing appears, then all pkgs exist."