Set up notifications for package availability

.config/setup/crontab

@@ -1 +1,2 @@
 @hourly /home/ohad/.local/bin/make-backup
+@hourly /home/ohad/.local/bin/package-alert

.local/bin/package-alert

@@ -0,0 +1,21 @@
+#! /usr/bin/sh
+
+WATCHLIST=~/.local/share/package-alert/watchlist
+
+agg_results=""
+
+if [ -f "${WATCHLIST}" ]; then
+    for pattern in $(cat "${WATCHLIST}"); do
+        pat_results=$(apt-cache search --names-only "${pattern}")
+        if [ ! -z "${pat_results}" ]; then
+            agg_results="${agg_results:+${agg_results}
+}Packages matching \"${pattern}\":
+${pat_results}
+"
+        fi
+    done
+fi
+
+if [ ! -z "${agg_results}" ]; then
+    printf '%s' "${agg_results}" | /usr/sbin/sendmail "${USER}"
+fi