Add a useful "version" command

plugins/commands.py

@@ -185,3 +185,11 @@ def shutdown(irc, source, args):
         # Disable auto-connect first by setting the time to negative.
         ircobj.serverdata['autoconnect'] = -1
         ircobj.aborted.set()
+
+@utils.add_cmd
+def version(irc, source, args):
+    """takes no arguments.
+
+    Returns the version of the currently running PyLink instance."""
+    irc.msg(source, "PyLink version \x02%s\x02, released under the Mozilla Public License version 2.0." % world.version)
+    irc.msg(source, "The source of this program is available at \x02%s\x02." % world.source)

pylink

@@ -14,7 +14,7 @@ import classes
 import coreplugin
 
 if __name__ == '__main__':
-    log.info('PyLink starting...')
+    log.info('PyLink %s starting...', world.version)
     if conf.conf['login']['password'] == 'changeme':
         log.critical("You have not set the login details correctly! Exiting...")
         sys.exit(2)
@@ -61,4 +61,3 @@ if __name__ == '__main__':
             world.networkobjects[network] = classes.Irc(network, proto)
     world.started.set()
     log.info("loaded plugins: %s", world.plugins)
-

world.py

@@ -2,6 +2,7 @@
 
 from collections import defaultdict
 import threading
+import subprocess
 
 # Global variable to indicate whether we're being ran directly, or imported
 # for a testcase.
@@ -16,3 +17,14 @@ schedulers = {}
 plugins = []
 whois_handlers = []
 started = threading.Event()
+
+version = "<unknown>"
+source = "https://github.com/GLolol/PyLink"  # CHANGE THIS IF YOU'RE FORKING!!
+
+# Only run this once.
+if version == "<unknown>":
+    # Get version from Git tags.
+    try:
+        version = 'v' + subprocess.check_output(['git', 'describe', '--tags']).decode('utf-8').strip()
+    except:
+        log.exception('Failed to get version from "git describe --tags".')