Created pylorax.discinfo for writing .discinfo files.

This functionality was previously handled by the makestamp.py
script in anaconda.  Created a module under pylorax with just
one function (for now).  Not sure if it will need to be
extended, but part of the reason for rewriting all of this
code is to make it more extendable.

pylorax/__init__.py

@@ -22,7 +22,18 @@
 
 version = (0, 1)
 
+__all__ = ['discinfo']
+
+import discinfo
+
 def show_version(prog):
+    """show_version(prog)
+
+    Display program name (prog) and version number.  If prog is an empty
+    string or None, use the value 'pylorax'.
+
+    """
+
     if prog is None or prog == '':
         prog = 'pylorax'
 

pylorax/discinfo.py

@@ -0,0 +1,62 @@
+#
+# pylorax discinfo module
+# Install image and tree support data generation tool -- Python module.
+#
+# Copyright (C) 2008  Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# Author(s): David Cantrell <dcantrell@redhat.com>
+#
+
+import os
+import time
+
+# Write out the .discinfo file
+def write(release=None, arch=None, outdir=None, disc=None):
+    """write(release=None, arch=None, outdir=None, [disc=None])
+
+    Write the .discinfo file to the specified directory (outdir).
+    The release string is specified as release and the architecture
+    is specified as arch.  If disc is specified, it will be written
+    as the disc number, otherwise 0 is written for the disc number.
+
+    The release, arch, and outdir parameters are all required.
+
+    """
+
+    if release is None or arch is None or outdir is None:
+        return False
+
+    if not os.path.isdir(outdir):
+        return False
+
+    outfile = "%s/.discinfo" % (outdir,)
+
+    try:
+        f = open(outfile, "w")
+        f.write("%s\n", time.time())
+        f.write("%s\n", release)
+        f.write("%s\n", arch)
+
+        if disc is not None:
+            f.write("%d\n", disc)
+        else:
+            f.write("0\n")
+
+        f.close()
+    except:
+        return False
+
+    return True