From 0843a791948fd91f5770dc932147edd2c4e80503 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Tue, 11 Nov 2008 03:02:01 +0000
Subject: [PATCH] *** empty log message ***

---
 direct/src/showbase/StartMF.py | 82 ++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 direct/src/showbase/StartMF.py

diff --git a/direct/src/showbase/StartMF.py b/direct/src/showbase/StartMF.py
new file mode 100644
index 0000000000..930d38a9fa
--- /dev/null
+++ b/direct/src/showbase/StartMF.py
@@ -0,0 +1,82 @@
+""" This module can serve as a startup script to play a Panda
+application packed within a .mf file.  Run via:
+
+python StartMF.py app.mf
+
+This is currently experimental, but the intent is to work towards a
+prepackaged Panda distributable, designed to run applications exactly
+like this.
+
+"""
+
+import sys
+from direct.showbase import VFSImporter
+from pandac.PandaModules import VirtualFileSystem, Filename, Multifile, ConfigPageManager, getModelPath
+from direct.stdpy.file import file, open
+import __builtin__
+
+MultifileRoot = '/mf'
+
+def runPackedApp(args):
+    if not args:
+        print "No Panda app specified.  Use:"
+        print "python StartMF.py app.mf"
+        sys.exit(1)
+
+    vfs = VirtualFileSystem.getGlobalPtr()
+
+    fname = Filename.fromOsSpecific(args[0])
+    if not vfs.exists(fname):
+        print "No such file: %s" % (args[0])
+        sys.exit(1)
+
+    mf = Multifile()
+    if not mf.openRead(fname):
+        print "Not a Panda Multifile: %s" % (args[0])
+        sys.exit(1)
+
+    # Clear *all* the mount points, including "/", so that we no
+    # longer access the disk directly.
+    vfs.unmountAll()
+
+    # Mount the Multifile under /mf, by convention, and make that our
+    # "current directory".
+    vfs.mount(mf, MultifileRoot, vfs.MFReadOnly)
+    vfs.chdir(MultifileRoot)
+
+    # Make sure the directories on our standard Python path are mounted
+    # read-only, so we can still load Python.
+    for dirname in sys.path:
+        vfs.mount(dirname, dirname, vfs.MFReadOnly)
+
+    # Also mount some standard directories read-write (temporary and
+    # app-data directories).
+    tdir = Filename.temporary('', '')
+    for dirname in set([ tdir.getDirname(),
+                         Filename.getTempDirectory().cStr(),
+                         Filename.getUserAppdataDirectory().cStr(),
+                         Filename.getCommonAppdataDirectory().cStr() ]):
+        vfs.mount(dirname, dirname, 0)
+
+    # Now set up Python to import this stuff.
+    VFSImporter.register()
+    sys.path = [ MultifileRoot ] + sys.path
+
+    # Put our root directory on the model-path and prc-path, too.
+    getModelPath().prependDirectory(MultifileRoot)
+
+    cpMgr = ConfigPageManager.getGlobalPtr()
+    cpMgr.getSearchPath().prependDirectory(MultifileRoot)
+    cpMgr.reloadImplicitPages()
+
+    # Replace the builtin open and file symbols so code will get our
+    # versions by default, which can open and read files out of the
+    # multifile.
+    __builtin__.file = file
+    __builtin__.open = open
+
+    import main
+
+if __name__ == '__main__':
+    runPackedApp(sys.argv[1:])
+