def setP3DFilename(self, p3dFilename, tokens, argv, instanceId,
                       interactiveConsole, p3dOffset = 0):
        """ Called by the browser to specify the p3d file that
        contains the application itself, along with the web tokens
        and/or command-line arguments.  Once this method has been
        called, the application is effectively started. """

        # One day we will have support for multiple instances within a
        # Python session.  Against that day, we save the instance ID
        # for this instance.
        self.instanceId = instanceId

        self.tokens = tokens
        self.argv = argv

        # We build up a token dictionary with care, so that if a given
        # token appears twice in the token list, we record only the
        # first value, not the second or later.  This is consistent
        # with the internal behavior of the core API.
        self.tokenDict = {}
        for token, keyword in tokens:
            self.tokenDict.setdefault(token, keyword)

        # Also store the arguments on sys, for applications that
        # aren't instance-ready.
        sys.argv = argv

        # That means we now know the altHost in effect.
        self.altHost = self.tokenDict.get('alt_host', None)

        # Tell the browser that Python is up and running, and ready to
        # respond to queries.
        self.notifyRequest('onpythonload')

        # Now go load the applet.
        fname = Filename.fromOsSpecific(p3dFilename)
        vfs = VirtualFileSystem.getGlobalPtr()

        if not vfs.exists(fname):
            raise ArgumentError, "No such file: %s" % (p3dFilename)

        fname.makeAbsolute()
        mf = Multifile()
        if p3dOffset == 0:
            if not mf.openRead(fname):
                raise ArgumentError, "Not a Panda3D application: %s" % (p3dFilename)
        else:
            if not mf.openRead(fname, p3dOffset):
                raise ArgumentError, "Not a Panda3D application: %s at offset: %s" % (p3dFilename, p3dOffset)

        # Now load the p3dInfo file.
        self.p3dInfo = None
        self.p3dPackage = None
        self.p3dConfig = None
        self.allowPythonDev = False

        i = mf.findSubfile('p3d_info.xml')
        if i >= 0 and hasattr(PandaModules, 'readXmlStream'):
            stream = mf.openReadSubfile(i)
            self.p3dInfo = PandaModules.readXmlStream(stream)
            mf.closeReadSubfile(stream)
        if self.p3dInfo:
            self.p3dPackage = self.p3dInfo.FirstChildElement('package')
        if self.p3dPackage:
            self.p3dConfig = self.p3dPackage.FirstChildElement('config')

            xhost = self.p3dPackage.FirstChildElement('host')
            while xhost:
                self.__readHostXml(xhost)
                xhost = xhost.NextSiblingElement('host')

        if self.p3dConfig:
            allowPythonDev = self.p3dConfig.Attribute('allow_python_dev')
            if allowPythonDev:
                self.allowPythonDev = int(allowPythonDev)
            guiApp = self.p3dConfig.Attribute('gui_app')
            if guiApp:
                self.guiApp = int(guiApp)

            trueFileIO = self.p3dConfig.Attribute('true_file_io')
            if trueFileIO:
                self.trueFileIO = int(trueFileIO)

        # The interactiveConsole flag can only be set true if the
        # application has allow_python_dev set.
        if not self.allowPythonDev and interactiveConsole:
            raise StandardError, "Impossible, interactive_console set without allow_python_dev."
        self.interactiveConsole = interactiveConsole

        if self.allowPythonDev:
            # Set the fps text to remind the user that
            # allow_python_dev is enabled.
            ConfigVariableString('frame-rate-meter-text-pattern').setValue('allow_python_dev %0.1f fps')

        if self.guiApp:
            initAppForGui()

        self.initPackedAppEnvironment()

        # Mount the Multifile under self.multifileRoot.
        vfs.mount(mf, self.multifileRoot, vfs.MFReadOnly)
        VFSImporter.reloadSharedPackages()

        self.loadMultifilePrcFiles(mf, self.multifileRoot)
        self.gotP3DFilename = True

        # Send this call to the main thread; don't call it directly.
        messenger.send('AppRunner_startIfReady', taskChain = 'default')
示例#2
0
    def setP3DFilename(self,
                       p3dFilename,
                       tokens,
                       argv,
                       instanceId,
                       interactiveConsole,
                       p3dOffset=0):
        """ Called by the browser to specify the p3d file that
        contains the application itself, along with the web tokens
        and/or command-line arguments.  Once this method has been
        called, the application is effectively started. """

        # One day we will have support for multiple instances within a
        # Python session.  Against that day, we save the instance ID
        # for this instance.
        self.instanceId = instanceId

        self.tokens = tokens
        self.argv = argv

        # We build up a token dictionary with care, so that if a given
        # token appears twice in the token list, we record only the
        # first value, not the second or later.  This is consistent
        # with the internal behavior of the core API.
        self.tokenDict = {}
        for token, keyword in tokens:
            self.tokenDict.setdefault(token, keyword)

        # Also store the arguments on sys, for applications that
        # aren't instance-ready.
        sys.argv = argv

        # That means we now know the altHost in effect.
        self.altHost = self.tokenDict.get('alt_host', None)

        # Tell the browser that Python is up and running, and ready to
        # respond to queries.
        self.notifyRequest('onpythonload')

        # Now go load the applet.
        fname = Filename.fromOsSpecific(p3dFilename)
        vfs = VirtualFileSystem.getGlobalPtr()

        if not vfs.exists(fname):
            raise ArgumentError, "No such file: %s" % (p3dFilename)

        fname.makeAbsolute()
        mf = Multifile()
        if p3dOffset == 0:
            if not mf.openRead(fname):
                raise ArgumentError, "Not a Panda3D application: %s" % (
                    p3dFilename)
        else:
            if not mf.openRead(fname, p3dOffset):
                raise ArgumentError, "Not a Panda3D application: %s at offset: %s" % (
                    p3dFilename, p3dOffset)

        # Now load the p3dInfo file.
        self.p3dInfo = None
        self.p3dPackage = None
        self.p3dConfig = None
        self.allowPythonDev = False

        i = mf.findSubfile('p3d_info.xml')
        if i >= 0 and hasattr(PandaModules, 'readXmlStream'):
            stream = mf.openReadSubfile(i)
            self.p3dInfo = PandaModules.readXmlStream(stream)
            mf.closeReadSubfile(stream)
        if self.p3dInfo:
            self.p3dPackage = self.p3dInfo.FirstChildElement('package')
        if self.p3dPackage:
            self.p3dConfig = self.p3dPackage.FirstChildElement('config')

            xhost = self.p3dPackage.FirstChildElement('host')
            while xhost:
                self.__readHostXml(xhost)
                xhost = xhost.NextSiblingElement('host')

        if self.p3dConfig:
            allowPythonDev = self.p3dConfig.Attribute('allow_python_dev')
            if allowPythonDev:
                self.allowPythonDev = int(allowPythonDev)
            guiApp = self.p3dConfig.Attribute('gui_app')
            if guiApp:
                self.guiApp = int(guiApp)

            trueFileIO = self.p3dConfig.Attribute('true_file_io')
            if trueFileIO:
                self.trueFileIO = int(trueFileIO)

        # The interactiveConsole flag can only be set true if the
        # application has allow_python_dev set.
        if not self.allowPythonDev and interactiveConsole:
            raise StandardError, "Impossible, interactive_console set without allow_python_dev."
        self.interactiveConsole = interactiveConsole

        if self.allowPythonDev:
            # Set the fps text to remind the user that
            # allow_python_dev is enabled.
            ConfigVariableString('frame-rate-meter-text-pattern').setValue(
                'allow_python_dev %0.1f fps')

        if self.guiApp:
            initAppForGui()

        self.initPackedAppEnvironment()

        # Mount the Multifile under self.multifileRoot.
        vfs.mount(mf, self.multifileRoot, vfs.MFReadOnly)
        VFSImporter.reloadSharedPackages()

        self.loadMultifilePrcFiles(mf, self.multifileRoot)
        self.gotP3DFilename = True

        # Send this call to the main thread; don't call it directly.
        messenger.send('AppRunner_startIfReady', taskChain='default')
示例#3
0
    def __unpackArchive(self, step):
        """ Unpacks any files in the archive that want to be unpacked
        to disk.  Yields one of stepComplete, stepFailed, 
        restartDownload, or stepContinue. """

        if not self.extracts:
            # Nothing to extract.
            self.hasPackage = True
            yield self.stepComplete
            return

        if self.host.appRunner and self.host.appRunner.verifyContents == self.host.appRunner.P3DVCNever:
            # We're not allowed to!
            yield self.stepFailed
            return

        self.updated = True

        mfPathname = Filename(self.getPackageDir(),
                              self.uncompressedArchive.filename)
        self.notify.info("Unpacking %s" % (mfPathname))
        mf = Multifile()
        if not mf.openRead(mfPathname):
            self.notify.warning("Couldn't open %s" % (mfPathname))
            yield self.stepFailed
            return

        allExtractsOk = True
        step.bytesDone = 0
        for file in self.extracts:
            i = mf.findSubfile(file.filename)
            if i == -1:
                self.notify.warning("Not in Multifile: %s" % (file.filename))
                allExtractsOk = False
                continue

            targetPathname = Filename(self.getPackageDir(), file.filename)
            targetPathname.setBinary()
            targetPathname.unlink()
            if not mf.extractSubfile(i, targetPathname):
                self.notify.warning("Couldn't extract: %s" % (file.filename))
                allExtractsOk = False
                continue

            if not file.quickVerify(self.getPackageDir(), notify=self.notify):
                self.notify.warning("After extracting, still incorrect: %s" %
                                    (file.filename))
                allExtractsOk = False
                continue

            # Make sure it's executable, and not writable.
            os.chmod(targetPathname.toOsSpecific(), 0555)

            step.bytesDone += file.size
            self.__updateStepProgress(step)
            if taskMgr.destroyed:
                # If the task manager has been destroyed, we must
                # be shutting down.  Get out of here.
                self.notify.warning(
                    "Task Manager destroyed, aborting unpacking %s" %
                    (mfPathname))
                yield self.stepFailed
                return

            yield self.stepContinue

        if not allExtractsOk:
            yield self.stepFailed
            return

        self.hasPackage = True
        yield self.stepComplete
        return
示例#4
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    def installPackage(self, appRunner):
        """ Mounts the package and sets up system paths so it becomes
        available for use.  Returns true on success, false on failure. """

        assert self.hasPackage
        if self.installed:
            # Already installed.
            return True
        assert self not in appRunner.installedPackages

        mfPathname = Filename(self.getPackageDir(),
                              self.uncompressedArchive.filename)
        mf = Multifile()
        if not mf.openRead(mfPathname):
            self.notify.warning("Couldn't open %s" % (mfPathname))
            return False

        # We mount it under its actual location on disk.
        root = self.getPackageDir().cStr()

        vfs = VirtualFileSystem.getGlobalPtr()
        vfs.mount(mf, root, vfs.MFReadOnly)

        # Add this to the Python search path, if it's not already
        # there.  We have to take a bit of care to check if it's
        # already there, since there can be some ambiguity in
        # os-specific path strings.
        osRoot = self.getPackageDir().toOsSpecific()
        foundOnPath = False
        for p in sys.path:
            if osRoot == p:
                # Already here, exactly.
                foundOnPath = True
                break
            elif osRoot == Filename.fromOsSpecific(p).toOsSpecific():
                # Already here, with some futzing.
                foundOnPath = True
                break

        if not foundOnPath:
            # Not already here; add it.
            sys.path.append(osRoot)

        # Put it on the model-path, too.  We do this indiscriminantly,
        # because the Panda3D runtime won't be adding things to the
        # model-path, so it shouldn't be already there.
        getModelPath().appendDirectory(self.getPackageDir())

        # Set the environment variable to reference the package root.
        envvar = '%s_ROOT' % (self.packageName.upper())
        ExecutionEnvironment.setEnvironmentVariable(envvar, osRoot)

        # Add the package root to the system paths.
        if sys.platform.startswith('win'):
            path = os.environ.get('PATH', '')
            os.environ['PATH'] = "%s;%s" % (osRoot, path)
        else:
            path = os.environ.get('PATH', '')
            os.environ['PATH'] = "%s:%s" % (osRoot, path)
            path = os.environ.get('LD_LIBRARY_PATH', '')
            os.environ['LD_LIBRARY_PATH'] = "%s:%s" % (osRoot, path)

        if sys.platform == "darwin":
            path = os.environ.get('DYLD_LIBRARY_PATH', '')
            os.environ['DYLD_LIBRARY_PATH'] = "%s:%s" % (osRoot, path)

        # Now that the environment variable is set, read all of the
        # prc files in the package.
        appRunner.loadMultifilePrcFiles(mf, self.getPackageDir())

        # Also, find any toplevel Python packages, and add these as
        # shared packages.  This will allow different packages
        # installed in different directories to share Python files as
        # if they were all in the same directory.
        for filename in mf.getSubfileNames():
            if filename.endswith('/__init__.pyc') or \
               filename.endswith('/__init__.pyo') or \
               filename.endswith('/__init__.py'):
                components = filename.split('/')[:-1]
                moduleName = '.'.join(components)
                VFSImporter.sharedPackages[moduleName] = True

        # Fix up any shared directories so we can load packages from
        # disparate locations.
        VFSImporter.reloadSharedPackages()

        self.installed = True
        appRunner.installedPackages.append(self)

        self.markUsed()

        return True
示例#5
0
    def installPackage(self, appRunner):
        """ Mounts the package and sets up system paths so it becomes
        available for use.  Returns true on success, false on failure. """

        assert self.hasPackage
        if self.installed:
            # Already installed.
            return True
        assert self not in appRunner.installedPackages

        mfPathname = Filename(self.getPackageDir(), self.uncompressedArchive.filename)
        mf = Multifile()
        if not mf.openRead(mfPathname):
            self.notify.warning("Couldn't open %s" % (mfPathname))
            return False

        # We mount it under its actual location on disk.
        root = self.getPackageDir().cStr()

        vfs = VirtualFileSystem.getGlobalPtr()
        vfs.mount(mf, root, vfs.MFReadOnly)

        # Add this to the Python search path, if it's not already
        # there.  We have to take a bit of care to check if it's
        # already there, since there can be some ambiguity in
        # os-specific path strings.
        osRoot = self.getPackageDir().toOsSpecific()
        foundOnPath = False
        for p in sys.path:
            if osRoot == p:
                # Already here, exactly.
                foundOnPath = True
                break
            elif osRoot == Filename.fromOsSpecific(p).toOsSpecific():
                # Already here, with some futzing.
                foundOnPath = True
                break

        if not foundOnPath:
            # Not already here; add it.
            sys.path.append(osRoot)

        # Put it on the model-path, too.  We do this indiscriminantly,
        # because the Panda3D runtime won't be adding things to the
        # model-path, so it shouldn't be already there.
        getModelPath().appendDirectory(self.getPackageDir())

        # Set the environment variable to reference the package root.
        envvar = '%s_ROOT' % (self.packageName.upper())
        ExecutionEnvironment.setEnvironmentVariable(envvar, osRoot)

        # Now that the environment variable is set, read all of the
        # prc files in the package.
        appRunner.loadMultifilePrcFiles(mf, self.getPackageDir())

        # Also, find any toplevel Python packages, and add these as
        # shared packages.  This will allow different packages
        # installed in different directories to share Python files as
        # if they were all in the same directory.
        for filename in mf.getSubfileNames():
            if filename.endswith('/__init__.pyc') or \
               filename.endswith('/__init__.pyo') or \
               filename.endswith('/__init__.py'):
                components = filename.split('/')[:-1]
                moduleName = '.'.join(components)
                VFSImporter.sharedPackages[moduleName] = True

        # Fix up any shared directories so we can load packages from
        # disparate locations.
        VFSImporter.reloadSharedPackages()

        self.installed = True
        appRunner.installedPackages.append(self)

        self.markUsed()

        return True
示例#6
0
    def __unpackArchive(self, step):
        """ Unpacks any files in the archive that want to be unpacked
        to disk.  Yields one of stepComplete, stepFailed, 
        restartDownload, or stepContinue. """

        if not self.extracts:
            # Nothing to extract.
            self.hasPackage = True
            yield self.stepComplete; return

        if self.host.appRunner and self.host.appRunner.verifyContents == self.host.appRunner.P3DVCNever:
            # We're not allowed to!
            yield self.stepFailed; return

        self.updated = True

        mfPathname = Filename(self.getPackageDir(), self.uncompressedArchive.filename)
        self.notify.info("Unpacking %s" % (mfPathname))
        mf = Multifile()
        if not mf.openRead(mfPathname):
            self.notify.warning("Couldn't open %s" % (mfPathname))
            yield self.stepFailed; return
        
        allExtractsOk = True
        step.bytesDone = 0
        for file in self.extracts:
            i = mf.findSubfile(file.filename)
            if i == -1:
                self.notify.warning("Not in Multifile: %s" % (file.filename))
                allExtractsOk = False
                continue

            targetPathname = Filename(self.getPackageDir(), file.filename)
            targetPathname.unlink()
            if not mf.extractSubfile(i, targetPathname):
                self.notify.warning("Couldn't extract: %s" % (file.filename))
                allExtractsOk = False
                continue
            
            if not file.quickVerify(self.getPackageDir(), notify = self.notify):
                self.notify.warning("After extracting, still incorrect: %s" % (file.filename))
                allExtractsOk = False
                continue

            # Make sure it's executable, and not writable.
            os.chmod(targetPathname.toOsSpecific(), 0555)

            step.bytesDone += file.size
            self.__updateStepProgress(step)
            if taskMgr.destroyed:
                # If the task manager has been destroyed, we must
                # be shutting down.  Get out of here.
                self.notify.warning("Task Manager destroyed, aborting unpacking %s" % (mfPathname))
                yield self.stepFailed; return

            yield self.stepContinue

        if not allExtractsOk:
            yield self.stepFailed; return

        self.hasPackage = True
        yield self.stepComplete; return
    def installPackagesInto(self, hostDir, platform):
        """ Installs the packages required by the .p3d file into
        the specified directory, for the given platform. """

        if not self.includeRequires:
            return

        pkgTree = PackageTree(platform, hostDir, self.hostUrl)
        pkgTree.installPackage("images", None, self.standalone.host.hostUrl)

        for name, version, hostUrl in self.requires:
            pkgTree.installPackage(name, version, hostUrl)

        # Remove the extracted files from the compressed archive, to save space.
        vfs = VirtualFileSystem.getGlobalPtr()
        for package in pkgTree.packages.values():
            if package.uncompressedArchive:
                archive = Filename(package.getPackageDir(), package.uncompressedArchive.filename)
                if not archive.exists():
                    continue

                mf = Multifile()
                # Make sure that it isn't mounted before altering it, just to be safe
                vfs.unmount(archive)
                os.chmod(archive.toOsSpecific(), 0644)
                if not mf.openReadWrite(archive):
                    Installer.notify.warning("Failed to open archive %s" % (archive))
                    continue

                # We don't iterate over getNumSubfiles because we're
                # removing subfiles while we're iterating over them.
                subfiles = mf.getSubfileNames()
                for subfile in subfiles:
                    # We do *NOT* call vfs.exists here in case the package is mounted.
                    if Filename(package.getPackageDir(), subfile).exists():
                        Installer.notify.debug("Removing already-extracted %s from multifile" % (subfile))
                        mf.removeSubfile(subfile)

                # This seems essential for mf.close() not to crash later.
                mf.repack()

                # If we have no subfiles left, we can just remove the multifile.
                # if mf.getNumSubfiles() == 0:
                #    Installer.notify.info("Removing empty archive %s" % (package.uncompressedArchive.filename))
                #    mf.close()
                #    archive.unlink()
                # else:
                mf.close()
                try:
                    os.chmod(archive.toOsSpecific(), 0444)
                except:
                    pass

        # Write out our own contents.xml file.
        doc = TiXmlDocument()
        decl = TiXmlDeclaration("1.0", "utf-8", "")
        doc.InsertEndChild(decl)

        xcontents = TiXmlElement("contents")
        for package in pkgTree.packages.values():
            xpackage = TiXmlElement("package")
            xpackage.SetAttribute("name", package.packageName)
            if package.platform:
                xpackage.SetAttribute("platform", package.platform)
                assert package.platform == platform
            if package.packageVersion:
                xpackage.SetAttribute("version", version)
                xpackage.SetAttribute(
                    "filename", package.packageName + "/" + package.packageVersion + "/" + package.descFileBasename
                )
            else:
                xpackage.SetAttribute("filename", package.packageName + "/" + package.descFileBasename)
            xcontents.InsertEndChild(xpackage)

        doc.InsertEndChild(xcontents)
        doc.SaveFile(Filename(hostDir, "contents.xml").toOsSpecific())
    def __init__(self, p3dfile, shortname, fullname, version, tokens={}):
        if not shortname:
            shortname = p3dfile.getBasenameWoExtension()
        self.shortname = shortname
        self.fullname = fullname
        self.version = str(version)
        self.includeRequires = False
        self.licensename = ""
        self.licensefile = Filename()
        self.authorid = "org.panda3d"
        self.authorname = os.environ.get("DEBFULLNAME", "")
        self.authoremail = os.environ.get("DEBEMAIL", "")

        # Try to determine a default author name ourselves.
        uname = None
        if pwd is not None and hasattr(os, "getuid"):
            uinfo = pwd.getpwuid(os.getuid())
            if uinfo:
                uname = uinfo.pw_name
                if not self.authorname:
                    self.authorname = uinfo.pw_gecos.split(",", 1)[0]

        # Fallbacks in case that didn't work or wasn't supported.
        if not uname:
            uname = getpass.getuser()
        if not self.authorname:
            self.authorname = uname
        if not self.authoremail and " " not in uname:
            self.authoremail = "%s@%s" % (uname, socket.gethostname())

        self.standalone = Standalone(p3dfile, tokens)
        self.tempDir = Filename.temporary("", self.shortname, "") + "/"
        self.tempDir.makeDir()
        self.__linuxRoot = None

        # Load the p3d file to read out the required packages
        mf = Multifile()
        if not mf.openRead(p3dfile):
            Installer.notify.error("Not a Panda3D application: %s" % (p3dFilename))
            return

        # Now load the p3dInfo file.
        self.hostUrl = PandaSystem.getPackageHostUrl()
        if not self.hostUrl:
            self.hostUrl = self.standalone.host.hostUrl
        self.requires = []
        i = mf.findSubfile("p3d_info.xml")
        if i >= 0:
            stream = mf.openReadSubfile(i)
            p3dInfo = readXmlStream(stream)
            mf.closeReadSubfile(stream)
            if p3dInfo:
                p3dPackage = p3dInfo.FirstChildElement("package")
                p3dHost = p3dPackage.FirstChildElement("host")
                if p3dHost.Attribute("url"):
                    self.hostUrl = p3dHost.Attribute("url")
                p3dRequires = p3dPackage.FirstChildElement("requires")
                while p3dRequires:
                    self.requires.append(
                        (p3dRequires.Attribute("name"), p3dRequires.Attribute("version"), p3dRequires.Attribute("host"))
                    )
                    p3dRequires = p3dRequires.NextSiblingElement("requires")

                if not self.fullname:
                    p3dConfig = p3dPackage.FirstChildElement("config")
                    if p3dConfig:
                        self.fullname = p3dConfig.Attribute("display_name")

        if not self.fullname:
            self.fullname = self.shortname
示例#9
0
def runPackedApp(args):
    if not args:
        raise ArgumentError, "No Panda app specified.  Use:\npython RunAppMF.py app.mf"

    vfs = VirtualFileSystem.getGlobalPtr()

    fname = Filename.fromOsSpecific(args[0])
    if not vfs.exists(fname):
        raise ArgumentError, "No such file: %s" % (args[0])

    mf = Multifile()
    if not mf.openRead(fname):
        raise ArgumentError, "Not a Panda Multifile: %s" % (args[0])

    # 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)

    # Load the implicit App.prc file.
    loadPrcFileData(AppPrcFilename, AppPrc)

    # Load any prc files in the root.  We have to load them
    # explicitly, since the ConfigPageManager can't directly look
    # inside the vfs.
    for f in vfs.scanDirectory(MultifileRoot):
        if f.getFilename().getExtension() == 'prc':
            data = f.readFile(True)
            loadPrcFileData(f.getFilename().cStr(), data)

    # Replace the builtin open and file symbols so user code will get
    # our versions by default, which can open and read files out of
    # the multifile.
    __builtin__.file = file.file
    __builtin__.open = file.open
    os.listdir = file.listdir
    os.walk = file.walk

    import main
    if hasattr(main, 'main') and callable(main.main):
        main.main()
    def installPackagesInto(self, hostDir, platform):
        """ Installs the packages required by the .p3d file into
        the specified directory, for the given platform. """

        if not self.includeRequires:
            return

        pkgTree = PackageTree(platform, hostDir, self.hostUrl)
        pkgTree.installPackage("images", None, self.standalone.host.hostUrl)

        for name, version, hostUrl in self.requires:
            pkgTree.installPackage(name, version, hostUrl)

        # Remove the extracted files from the compressed archive, to save space.
        vfs = VirtualFileSystem.getGlobalPtr()
        for package in pkgTree.packages.values():
            if package.uncompressedArchive:
                archive = Filename(package.getPackageDir(),
                                   package.uncompressedArchive.filename)
                if not archive.exists():
                    continue

                mf = Multifile()
                # Make sure that it isn't mounted before altering it, just to be safe
                vfs.unmount(archive)
                os.chmod(archive.toOsSpecific(), 0644)
                if not mf.openReadWrite(archive):
                    Installer.notify.warning("Failed to open archive %s" %
                                             (archive))
                    continue

                # We don't iterate over getNumSubfiles because we're
                # removing subfiles while we're iterating over them.
                subfiles = mf.getSubfileNames()
                for subfile in subfiles:
                    # We do *NOT* call vfs.exists here in case the package is mounted.
                    if Filename(package.getPackageDir(), subfile).exists():
                        Installer.notify.debug(
                            "Removing already-extracted %s from multifile" %
                            (subfile))
                        mf.removeSubfile(subfile)

                # This seems essential for mf.close() not to crash later.
                mf.repack()

                # If we have no subfiles left, we can just remove the multifile.
                #if mf.getNumSubfiles() == 0:
                #    Installer.notify.info("Removing empty archive %s" % (package.uncompressedArchive.filename))
                #    mf.close()
                #    archive.unlink()
                #else:
                mf.close()
                try:
                    os.chmod(archive.toOsSpecific(), 0444)
                except:
                    pass

        # Write out our own contents.xml file.
        doc = TiXmlDocument()
        decl = TiXmlDeclaration("1.0", "utf-8", "")
        doc.InsertEndChild(decl)

        xcontents = TiXmlElement("contents")
        for package in pkgTree.packages.values():
            xpackage = TiXmlElement('package')
            xpackage.SetAttribute('name', package.packageName)
            if package.platform:
                xpackage.SetAttribute('platform', package.platform)
                assert package.platform == platform
            if package.packageVersion:
                xpackage.SetAttribute('version', version)
                xpackage.SetAttribute(
                    'filename', package.packageName + "/" +
                    package.packageVersion + "/" + package.descFileBasename)
            else:
                xpackage.SetAttribute(
                    'filename',
                    package.packageName + "/" + package.descFileBasename)
            xcontents.InsertEndChild(xpackage)

        doc.InsertEndChild(xcontents)
        doc.SaveFile(Filename(hostDir, "contents.xml").toOsSpecific())
    def __init__(self, p3dfile, shortname, fullname, version, tokens={}):
        if not shortname:
            shortname = p3dfile.getBasenameWoExtension()
        self.shortname = shortname
        self.fullname = fullname
        self.version = str(version)
        self.includeRequires = False
        self.licensename = ""
        self.licensefile = Filename()
        self.authorid = "org.panda3d"
        self.authorname = os.environ.get("DEBFULLNAME", "")
        self.authoremail = os.environ.get("DEBEMAIL", "")

        # Try to determine a default author name ourselves.
        uname = None
        if pwd is not None and hasattr(os, 'getuid'):
            uinfo = pwd.getpwuid(os.getuid())
            if uinfo:
                uname = uinfo.pw_name
                if not self.authorname:
                    self.authorname = \
                        uinfo.pw_gecos.split(',', 1)[0]

        # Fallbacks in case that didn't work or wasn't supported.
        if not uname:
            uname = getpass.getuser()
        if not self.authorname:
            self.authorname = uname
        if not self.authoremail and ' ' not in uname:
            self.authoremail = "%s@%s" % (uname, socket.gethostname())

        self.standalone = Standalone(p3dfile, tokens)
        self.tempDir = Filename.temporary("", self.shortname, "") + "/"
        self.tempDir.makeDir()
        self.__linuxRoot = None

        # Load the p3d file to read out the required packages
        mf = Multifile()
        if not mf.openRead(p3dfile):
            Installer.notify.error("Not a Panda3D application: %s" %
                                   (p3dFilename))
            return

        # Now load the p3dInfo file.
        self.hostUrl = PandaSystem.getPackageHostUrl()
        if not self.hostUrl:
            self.hostUrl = self.standalone.host.hostUrl
        self.requires = []
        i = mf.findSubfile('p3d_info.xml')
        if i >= 0:
            stream = mf.openReadSubfile(i)
            p3dInfo = readXmlStream(stream)
            mf.closeReadSubfile(stream)
            if p3dInfo:
                p3dPackage = p3dInfo.FirstChildElement('package')
                p3dHost = p3dPackage.FirstChildElement('host')
                if p3dHost.Attribute('url'):
                    self.hostUrl = p3dHost.Attribute('url')
                p3dRequires = p3dPackage.FirstChildElement('requires')
                while p3dRequires:
                    self.requires.append((p3dRequires.Attribute('name'),
                                          p3dRequires.Attribute('version'),
                                          p3dRequires.Attribute('host')))
                    p3dRequires = p3dRequires.NextSiblingElement('requires')

                if not self.fullname:
                    p3dConfig = p3dPackage.FirstChildElement('config')
                    if p3dConfig:
                        self.fullname = p3dConfig.Attribute('display_name')

        if not self.fullname:
            self.fullname = self.shortname