Added aprsd version checking

This patch adds usage of update_checker to check to make sure the
version of APRSD being launched is the latest version.  Also added a
call to upate_checker as part of the KeepAlive thread.  It will
call update_check every hour.  If there is no aprsd connectivitity,
the update check will silently fail.

aprsd/main.py

@@ -199,6 +199,43 @@ def setup_logging(config, loglevel, quiet):
             imap_logger.addHandler(sh)
 
 
+@main.command()
+@click.option(
+    "--loglevel",
+    default="INFO",
+    show_default=True,
+    type=click.Choice(
+        ["CRITICAL", "ERROR", "WARNING", "INFO", "DEBUG"],
+        case_sensitive=False,
+    ),
+    show_choices=True,
+    help="The log level to use for aprsd.log",
+)
+@click.option(
+    "-c",
+    "--config",
+    "config_file",
+    show_default=True,
+    default=utils.DEFAULT_CONFIG_FILE,
+    help="The aprsd config file to use for options.",
+)
+def check_version(loglevel, config_file):
+    config = utils.parse_config(config_file)
+
+    # Force setting the config to the modules that need it
+    # TODO(Walt): convert these modules to classes that can
+    # Accept the config as a constructor param, instead of this
+    # hacky global setting
+    email.CONFIG = config
+
+    setup_logging(config, loglevel, False)
+    level, msg = utils._check_version()
+    if level:
+        LOG.warning(msg)
+    else:
+        LOG.info(msg)
+
+
 @main.command()
 def sample_config():
     """This dumps the config to stdout."""
@@ -417,6 +454,12 @@ def server(
     email.CONFIG = config
 
     setup_logging(config, loglevel, quiet)
+    level, msg = utils._check_version()
+    if level:
+        LOG.warning(msg)
+    else:
+        LOG.info(msg)
+
     if config["aprsd"].get("trace", False):
         trace.setup_tracing(["method", "api"])
     LOG.info("APRSD Started version: {}".format(aprsd.__version__))

aprsd/threads.py

@@ -67,10 +67,11 @@ class APRSDThread(threading.Thread, metaclass=abc.ABCMeta):
 
 class KeepAliveThread(APRSDThread):
     cntr = 0
+    checker_time = datetime.datetime.now()
 
     def __init__(self):
-        super().__init__("KeepAlive")
         tracemalloc.start()
+        super().__init__("KeepAlive")
 
     def loop(self):
         if self.cntr % 6 == 0:
@@ -102,6 +103,13 @@ class KeepAliveThread(APRSDThread):
                 )
             )
             LOG.debug(keepalive)
+            # Check version every hour
+            delta = now - self.checker_time
+            if delta > datetime.timedelta(hours=1):
+                self.checker_time = now
+                level, msg = utils._check_version()
+                if level:
+                    LOG.warning(msg)
         self.cntr += 1
         time.sleep(10)
         return True

aprsd/utils.py

@@ -8,8 +8,10 @@ from pathlib import Path
 import sys
 import threading
 
+import aprsd
 from aprsd import plugin
 import click
+import update_checker
 import yaml
 
 LOG_LEVELS = {
@@ -364,7 +366,7 @@ def parse_config(config_file):
 
 
 def human_size(bytes, units=None):
-    """ Returns a human readable string representation of bytes """
+    """Returns a human readable string representation of bytes"""
     if not units:
         units = [" bytes", "KB", "MB", "GB", "TB", "PB", "EB"]
     return str(bytes) + units[0] if bytes < 1024 else human_size(bytes >> 10, units[1:])
@@ -375,3 +377,20 @@ def strfdelta(tdelta, fmt="{hours}:{minutes}:{seconds}"):
     d["hours"], rem = divmod(tdelta.seconds, 3600)
     d["minutes"], d["seconds"] = divmod(rem, 60)
     return fmt.format(**d)
+
+
+def _check_version():
+    # check for a newer version
+    try:
+        check = update_checker.UpdateChecker()
+        result = check.check("aprsd", aprsd.__version__)
+        if result:
+            # Looks like there is an updated version.
+            return 1, result
+        else:
+            return 0, "APRSD is up to date"
+    except Exception:
+        # probably can't get in touch with pypi for some reason
+        # Lets put up an error and move on.  We might not
+        # have internet in this aprsd deployment.
+        return 1, "Couldn't check for new version of APRSD"