Add VPN widget for tmux-collector

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

bin/tmux-vpn

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+from pathlib import Path
+import subprocess
+import sys
+import yaml
+
+
+def check_ping_reachable(ip):
+    try:
+        subprocess.check_call(['ping', '-c2', '-W1', ip],
+                              stdout=subprocess.DEVNULL,
+                              stderr=subprocess.DEVNULL)
+        return True
+    except subprocess.CalledProcessError:
+        return False
+
+
+def main():
+    config = yaml.load(open(Path('~/.config/i3-vpn.json').expanduser()))
+    results = []
+
+    for check in config['checks']:
+        if check_ping_reachable(check['ip']):
+            results.append(check['icon'])
+
+    print(' '.join(results))
+
+
+if __name__ == '__main__':
+    sys.exit(main())