Generate hy.version using git describe

.gitignore

@@ -1,3 +1,4 @@
+/hy/version.py
 *.pyc
 *swp
 *hy*egg*

hy/__init__.py

@@ -19,7 +19,11 @@
 # DEALINGS IN THE SOFTWARE.
 
 
-from hy.version import __version__, __appname__  # NOQA
+__appname__ = 'hy'
+try:
+    from hy.version import __version__
+except ImportError:
+    __version__ = 'unknown'
 
 
 from hy.models.expression import HyExpression  # NOQA

hy/version.py

@@ -1,23 +0,0 @@
-# Copyright (c) 2013 Paul Tagliamonte <paultag@debian.org>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a
-# copy of this software and associated documentation files (the "Software"),
-# to deal in the Software without restriction, including without limitation
-# the rights to use, copy, modify, merge, publish, distribute, sublicense,
-# and/or sell copies of the Software, and to permit persons to whom the
-# Software is furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
-# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-# DEALINGS IN THE SOFTWARE.
-
-
-__appname__ = "hy"
-__version__ = "0.11.0"

setup.py

@@ -22,24 +22,19 @@
 import os
 import re
 import sys
+import subprocess
 
 from setuptools import find_packages, setup
 
 PKG = "hy"
 VERSIONFILE = os.path.join(PKG, "version.py")
-verstr = "unknown"
 try:
-    verstrline = open(VERSIONFILE, "rt").read()
-except EnvironmentError:
-    pass  # Okay, there is no version file.
-else:
-    VSRE = r"^__version__ = ['\"]([^'\"]*)['\"]"
-    mo = re.search(VSRE, verstrline, re.M)
-    if mo:
-        __version__ = mo.group(1)
-    else:
-        msg = "if %s.py exists, it is required to be well-formed" % VERSIONFILE
-        raise RuntimeError(msg)
+    __version__ = subprocess.check_output([
+        "git", "describe", "--tags", "--dirty"]).decode('ASCII').strip()
+    with open(VERSIONFILE, "wt") as o:
+        o.write("__version__ = {!r}\n".format(__version__))
+except subprocess.CalledProcessError:
+    __version__ = "unknown"
 
 long_description = """Hy is a Python <--> Lisp layer. It helps
 make things work nicer, and lets Python and the Hy lisp variant play