Perform handshakes asynchronously

certo/__main__.py

@@ -1,6 +1,6 @@
 """
 Usage:
-    certo [-vj] <hostnames>... [-d DAYS|--days-to-expiration=DAYS] [-t SECONDS|--timeout=SECONDS]
+    certo [-vj] [-d DAYS|--days-to-expiration=DAYS] [-t SECONDS|--timeout=SECONDS] <hostnames>...
     certo -h | --help
 
 Options:
@@ -10,6 +10,7 @@ Options:
    -d DAYS --days-to-expiration=DAYS  Warn about near expiration if within DAYS of the cert's notAfter [default: 5].
    -t SECONDS --timeout=SECONDS       Timeout for SSL Handshake [default: 5].
 """
+import asyncio
 import logging
 
 from docopt import docopt
@@ -17,7 +18,8 @@ from docopt import docopt
 from certo.checks.hostname import check_host_certificate_expiration
 from certo.report import JSONReporter, DefaultReporter
 
-if __name__ == "__main__":
+
+async def main():
     args = docopt(__doc__)
 
     output_as_json = args.get("-j")
@@ -32,12 +34,19 @@ if __name__ == "__main__":
     else:
         reporter = DefaultReporter()
 
-    # @todo async
-    for hs in hostnames:
-        logging.info(f"Getting CERT from {hs}")
-        reporter.add_check(check_host_certificate_expiration(hs, days_to_expiration))
+    jobs = {
+        check_host_certificate_expiration(hs, days_to_expiration) for hs in hostnames
+    }
+    checks = await asyncio.gather(*jobs)
+
+    for check in checks:
+        reporter.append(check)
 
     if log := reporter.report():
         print(log)
 
     exit(reporter.num_failed())
+
+
+if __name__ == "__main__":
+    asyncio.run(main())