fix version query and add one to the log file

Fix "lorax -V" and add a "version is ???" to the log file so we can easily know
what version of lorax is used to build an iso.
Changed to try/import for versioning because the version file is autogenerated.

src/pylorax/__init__.py

@@ -142,6 +142,14 @@ class Lorax(BaseLoraxClass):
 
         assert self._configured
 
+        # get lorax version
+        try:
+            import pylorax.version
+        except ImportError:
+            vernum = "devel"
+        else:
+            vernum = pylorax.version.num
+
         if domacboot:
             try:
                 runcmd(["rpm", "-q", "hfsplus-tools"])
@@ -161,6 +169,8 @@ class Lorax(BaseLoraxClass):
 
         self.init_stream_logging()
         self.init_file_logging(logdir)
+
+        logger.debug("version is {0}".format(vernum))
         logger.debug("using work directory {0.workdir}".format(self))
         logger.debug("using log directory {0}".format(logdir))
 

src/sbin/lorax

@@ -76,7 +76,15 @@ def setup_logging(opts):
 
 
 def main(args):
-    version = "{0} 0.1".format(os.path.basename(args[0]))
+    # get lorax version
+    try:
+        import pylorax.version
+    except ImportError:
+        vernum = "devel"
+    else:
+        vernum = pylorax.version.num
+
+    version = "{0}-{1}".format(os.path.basename(args[0]), vernum)
     usage = "%prog -p PRODUCT -v VERSION -r RELEASE -s REPOSITORY OUTPUTDIR"
 
     parser = OptionParser(usage=usage)
@@ -136,15 +144,15 @@ def main(args):
     # parse the arguments
     opts, args = parser.parse_args()
 
+    if opts.showver:
+        print(version)
+        sys.exit(0)
+
     try:
         outputdir = os.path.abspath(args[0])
     except IndexError:
         parser.error("missing one or more required arguments")
 
-    if opts.showver:
-        print(version)
-        sys.exit(0)
-
     # check for the required arguments
     if not opts.product or not opts.version or not opts.release \
             or not opts.source or not outputdir: