Start of experimental install-gsos.py

This script replaces--or rather will eventually replace--the bash script
that installs netboot files in /media/A2SHARED.  It generally is going
to be implemented for now as a copy of the shell script, not quite
verbatim.  For example, rather than run individual commands with sudo,
it re-runs itself with sudo.  And rather than force scriptURL to include
a trailing slash, it explicitly chops the slash off to behave more like
you'd expect directories to.

Also, the body of installing the netboot files will be built as a
function rather than as straight script execution.  Basically the idea
there is to begin breaking the components of the netboot script into
their own functions that can be accessed independently in the future.
One step at a time there.

Anyway, very little of the script is done yet.  This is just to begin
the process and perhaps elicit some feedback if I'm really doing
something totally wrong here--my python's a little rusty.

experimental/install-gsos.py

@@ -0,0 +1,64 @@
+#! /usr/bin/env python
+
+import os, sys, subprocess
+
+gsosDir = "/media/A2SHARED/FILES"
+imagesDir = gsosDir + "/GSOS.INSTALLER/IMAGES"
+imageToolsDir = gsosDir + "/GSOS.INSTALLER/IMAGE.TOOLS"
+netInstallDir = gsosDir + "/GSOS.INSTALLER/NET.INSTALL"
+
+p8Dir = "/media/A2SHARED/A2FILES"
+diskToolsP8Dir = p8Dir + "/DISK.TOOLS.P8"
+
+commDir = "/media/A2SHARED/A2FILES/COMM"
+spectrumDir = commDir + "/SPECTRUM"
+protermDir = commDir + "/PROTERM"
+zlinkDir = commDir + "/Z.LINK"
+adtproDir = commDir + "/ADTPRO"
+
+# Python 3.x replaced (useless) input() with raw_input()
+try:
+    stdin_input = raw_input
+except NameError:
+    stdin_input = input
+
+# Differing from the shell script in that we explicitly strip the / here
+if os.environ.has_key('A2SERVER_SCRIPT_URL'):
+    scriptURL = os.environ['A2SERVER_SCRIPT_URL']
+    # Strip trailing slash
+    if scriptURL.endsWith('/'):
+        scriptURL = scriptURL[:-1]
+else:
+    scriptURL = "http://appleii.ivanx.com/a2server"
+
+def do_install():
+    pass
+
+if __name__ == "__main__":
+    # bail out on automated netboot setup unless -b is also specified
+    # FIXME: This logic belongs in a2server-setup, not here
+    autoAnswerYes = os.path.isfile("/tmp/a2server-autoAnswerYes")
+    if autoAnswerYes and not os.path.isfile("/tmp/a2server-setupNetBoot"):
+        sys.exit(0)
+
+    # We need root to do this.  If we don't have it, just rerun the command with
+    # sudo and be done with it.
+    #
+    # FIXME: Should we be doing this?  A generic installer should not assume it's
+    # writing to a root-owned dir, nor care.  Probably the reason to do it this way
+    # is as a proof of concept that it can be done this way in the main
+    # a2server-setup script, which of course means we don't actually need to change
+    # the password for the user.
+    if os.geteuid() != 0:
+        args = sys.argv
+        args.insert(0, 'sudo')
+        # At the very least, we should print the command line we're running here
+        print ("Rerunning with sudo...")
+        ret = subprocess.call(args)
+        sys.exit(ret)
+
+    reply = stdin_input("""
+Do you want to set up A2SERVER to be able to boot Apple II
+computers over the network? [y] """)
+    if reply.startswith("y") or reply.startswith("Y") or reply == "":
+        do_install