Add github notification count

Signed-off-by: Knut Ahlers <knut@ahlers.me>

.config/i3blocks/config

@@ -32,6 +32,9 @@ markup=pango
 [mpc]
 interval=5
 
+[github]
+interval=300
+
 [arch-update]
 interval=600
 

.config/i3blocks/github

@@ -0,0 +1,21 @@
+#!/bin/bash
+set -euo pipefail
+
+# Get token from vault
+gh_token=$(vault read -field=token secret/private/github/notifications)
+[ -z "${gh_token}" ] && exit 1
+
+# Get unread notifications (capped, no pagination!)
+count=$(curl -su "api:${gh_token}" https://api.github.com/notifications | jq '. | length')
+
+# No updates: Gray
+color="#7f7f7f"
+display_num=""
+
+# Normal updates: White
+[ $count -gt 0 ] && {
+	color="#ffffff"
+	display_num=" ${count}"
+}
+
+printf '<span color="%s">\ue709%s</span>' "${color}" "${display_num}"