Generate __init__.py with package version on runtime

Closes #259. This removes world.version and replaces it with pylinkirc.__version__ where the former was used.

classes.py

@@ -17,7 +17,7 @@ import hashlib
 from copy import deepcopy
 import inspect
 
-from . import world, utils, structures
+from . import world, utils, structures, __version__
 from .log import *
 
 ### Exceptions
@@ -786,7 +786,7 @@ class Irc():
         Returns a detailed version string including the PyLink daemon version,
         the protocol module in use, and the server hostname.
         """
-        fullversion = 'PyLink-%s. %s :[protocol:%s]' % (world.version, self.serverdata['hostname'], self.protoname)
+        fullversion = 'PyLink-%s. %s :[protocol:%s]' % (__version__, self.serverdata['hostname'], self.protoname)
         return fullversion
 
     ### State checking functions

plugins/commands.py

@@ -1,7 +1,7 @@
 # commands.py: base PyLink commands
 from time import ctime
 
-from pylinkirc import utils
+from pylinkirc import utils, __version__, world
 from pylinkirc.log import log
 
 @utils.add_cmd
@@ -112,7 +112,7 @@ def version(irc, source, args):
     """takes no arguments.
 
     Returns the version of the currently running PyLink instance."""
-    irc.reply("PyLink version \x02%s\x02, released under the Mozilla Public License version 2.0." % world.version)
+    irc.reply("PyLink version \x02%s\x02, released under the Mozilla Public License version 2.0." % __version__)
     irc.reply("The source of this program is available at \x02%s\x02." % world.source)
 
 @utils.add_cmd

pylink

@@ -6,7 +6,7 @@ PyLink IRC Services launcher.
 import os
 import sys
 try:
-    from pylinkirc import world, conf
+    from pylinkirc import world, conf, __version__
 except ImportError:
     sys.stderr.write("ERROR: Failed to import PyLink main module (pylinkirc.world).\n\nIf you are "
                      "running PyLink from source, please install PyLink first using 'python3 "
@@ -23,7 +23,7 @@ if __name__ == '__main__':
     args = parser.parse_args()
 
     if args.version:  # Display version and exit
-        print(world.version)
+        print('PyLink ' + __version__)
         sys.exit()
 
     # Load the config
@@ -31,7 +31,7 @@ if __name__ == '__main__':
 
     from pylinkirc.log import log
     from pylinkirc import classes, utils, coremods
-    log.info('PyLink %s starting...', world.version)
+    log.info('PyLink %s starting...', __version__)
 
     # Write a PID file unless specifically told not to.
     if not args.no_pid:

setup.py

@@ -2,8 +2,24 @@
 
 from setuptools import setup, find_packages
 from codecs import open
+import subprocess
 from os import path
 
+# Get version from Git tags.
+try:
+    version = subprocess.check_output(['git', 'describe', '--tags']).decode('utf-8').strip()
+except Exception as e:
+    print('ERROR: Failed to get version from "git describe --tags": %s: %s' % (type(e).__name__, e))
+    from . import __version__ as fallback_version
+    print('Using fallback version of %r.' % fallback_version)
+    version = fallback_version
+
+else:
+    # Success. Write the version to disk.
+    with open('__init__.py', 'w') as f:
+        f.write('# Automatically generated by setup.py\n')
+        f.write('__version__ = %r\n' % version)
+
 curdir = path.abspath(path.dirname(__file__))
 
 # FIXME: Convert markdown to RST
@@ -12,7 +28,7 @@ with open(path.join(curdir, 'README.md'), encoding='utf-8') as f:
 
 setup(
     name='pylinkirc',
-    version='0.9.0-dev1',
+    version=version,
 
     description='PyLink IRC Services',
     long_description=long_description,

world.py

@@ -4,8 +4,6 @@ world.py: Stores global variables for PyLink, including lists of active IRC obje
 
 from collections import defaultdict
 import threading
-import subprocess
-import os
 
 # This indicates whether we're running in tests modes. What it actually does
 # though is control whether IRC connections should be threaded or not.
@@ -20,13 +18,4 @@ services = {}
 
 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 Exception as e:
-        print('ERROR: Failed to get version from "git describe --tags": %s: %s' % (type(e).__name__, e))