Add lxml.etree-based implementation
authorOleg Broytman <phd@phdru.name>
Tue, 19 Nov 2013 19:19:55 +0000 (23:19 +0400)
committerOleg Broytman <phd@phdru.name>
Tue, 19 Nov 2013 19:19:55 +0000 (23:19 +0400)
xml [changed from symlink to file mode: 0755]
xml-ANNOUNCE
xml-unified [deleted file]

diff --git a/xml b/xml
deleted file mode 120000 (symlink)
index e9fc63c58a9ec8565a9c6e6e5dfb5acac3b95cdd..0000000000000000000000000000000000000000
--- a/xml
+++ /dev/null
@@ -1 +0,0 @@
-xml-unified
\ No newline at end of file
diff --git a/xml b/xml
new file mode 100755 (executable)
index 0000000000000000000000000000000000000000..084a78483553f2f6cfed759bcce5b5efdfc85904
--- /dev/null
+++ b/xml
@@ -0,0 +1,436 @@
+#! /usr/bin/env python
+"""XML Virtual FileSystem for Midnight Commander
+
+The script requires Midnight Commander 3.1+
+(http://www.midnight-commander.org/), Python 2.4+ (http://www.python.org/).
+
+For mc 4.7+ put the script in $HOME/[.local/share/].mc/extfs.d.
+For older versions put it in /usr/[local/][lib|share]/mc/extfs
+and add a line "xml" to the /usr/[local/][lib|share]/mc/extfs/extfs.ini.
+Make the script executable.
+
+For mc 4.7+ run this "cd" command in the Midnight Commander (in the "bindings"
+file the command is "%cd"): cd file/xml://; In older versions it is
+cd file#xml, where "file" is the name of your XML file.
+
+The VFS represents tags as directories; the directories are numbered to
+distinguish tags with the same name; also numbering helps to sort tags by their
+order in XML instead of sorting them by name. Attributes, text nodes and
+comments are represented as text files; attributes are shown in a file named
+"attributes", attributes are listed in the file as name=value lines (I
+deliberately ignore a small chance of newline characters in values); names and
+values are reencoded to the console encoding. Text nodes and comments are
+collected in a file named "text", stripped and reencoded. The filesystem is
+read-only. ElementTree- and lxml.etree-based implementations don't show
+namespaces as attributes.
+
+It is useful to have a top-down view on an XML structure but it's especially
+convenient to extract text values from tags. One can get, for example, a
+base64-encoded image - just walk down the VFS to the tag's directory and copy
+its text file to a real file.
+
+The VFS was inspired by a FUSE xmlfs: https://github.com/halhen/xmlfs
+
+"""
+
+__version__ = "0.5.0"
+__author__ = "Oleg Broytman <phd@phdru.name>"
+__copyright__ = "Copyright (C) 2013 PhiloSoft Design"
+__license__ = "GPL"
+
+default_implementation = None # Can be None for default choice,
+                              # 'lxml', 'elementtree' or 'minidom'
+
+use_minidom = True
+use_elementtree = False
+use_lxml = False
+
+import math
+import sys
+import xml.dom.minidom
+
+try:
+    import xml.etree.ElementTree as ET
+except ImportError:
+    pass
+else:
+    use_elementtree = True
+
+try:
+    import lxml.etree as etree
+except ImportError:
+    pass
+else:
+    use_lxml = True
+
+try:
+   import locale
+   use_locale = True
+except ImportError:
+   use_locale = False
+
+if use_locale:
+   # Get the default charset.
+   try:
+      lcAll = locale.getdefaultlocale()
+   except locale.Error, err:
+      print >>sys.stderr, "WARNING:", err
+      lcAll = []
+
+   if len(lcAll) == 2:
+      default_encoding = lcAll[1]
+   else:
+      try:
+         default_encoding = locale.getpreferredencoding()
+      except locale.Error, err:
+         print >>sys.stderr, "WARNING:", err
+         default_encoding = sys.getdefaultencoding()
+else:
+   default_encoding = sys.getdefaultencoding()
+
+import logging
+logger = logging.getLogger('xml-mcextfs')
+log_err_handler = logging.StreamHandler(sys.stderr)
+logger.addHandler(log_err_handler)
+logger.setLevel(logging.INFO)
+
+if len(sys.argv) < 3:
+    logger.critical("""\
+XML Virtual FileSystem for Midnight Commander version %s
+Author: %s
+%s
+
+This is not a program. Put the script in $HOME/[.local/share/].mc/extfs.d or
+/usr/[local/][lib|share]/mc/extfs. For more information read the source!""",
+   __version__, __author__, __copyright__
+)
+    sys.exit(1)
+
+
+locale.setlocale(locale.LC_ALL, '')
+
+
+class XmlVfs(object):
+    def __init__(self):
+        self.parse()
+
+    def list(self):
+        self._list(self.getroot())
+
+    def get_child_node(self, node, i):
+        n = 0
+        for element in self.getchildren(node):
+            if self.istag(element):
+                n += 1
+                if n == i:
+                    return element
+        xml_error('There are less than %d nodes' % i)
+
+
+class MiniDOMXmlVfs(XmlVfs):
+    def parse(self):
+        self.document = xml.dom.minidom.parse(sys.argv[2])
+
+    def hasattrs(self, node):
+        return bool(node.attributes)
+
+    def attrs2text(self, node):
+        attrs = node.attributes
+        attrs = [attrs.item(i) for i in range (attrs.length)]
+        return '\n'.join(["%s=%s" %
+            (a.name.encode(default_encoding, "replace"),
+            a.value.encode(default_encoding, "replace"))
+            for a in attrs])
+
+    def collect_text(self, node):
+        text_accumulator = []
+        for element in node.childNodes:
+            if element.localName:
+                continue
+            elif element.nodeType == element.COMMENT_NODE:
+                text = u"<!--%s-->" % element.nodeValue
+            elif element.nodeType == element.TEXT_NODE:
+                text = element.nodeValue.strip()
+            else:
+                xml_error("Unknown node type %d" % element.nodeType)
+            if text: text_accumulator.append(text)
+        return '\n'.join(text_accumulator).encode(default_encoding, "replace")
+
+    def _list(self, node, path=''):
+        childNodes = node.childNodes
+        n = 0
+        for element in childNodes:
+            if element.localName:
+                n += 1
+        if n:
+            width = int(math.log10(n))+1
+            template = "%%0%dd" % width
+        else:
+            template = "%d"
+        n = 0
+        for element in childNodes:
+            if element.localName:
+                n += 1
+                if path:
+                    subpath = '%s/%s %s' % (path, template % n, element.localName)
+                else:
+                    subpath = '%s %s' % (template % n, element.localName)
+                subpath_encoded = subpath.encode(default_encoding, "replace")
+                print "dr-xr-xr-x 1 user group 0 Jan 1 00:00 %s" % subpath_encoded
+                if self.hasattrs(element):
+                    attr_text = self.attrs2text(element)
+                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/attributes" % (
+                        len(attr_text), subpath_encoded)
+                text = self.collect_text(element)
+                if text:
+                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/text" % (
+                        len(text), subpath_encoded)
+                self._list(element, subpath)
+
+    def getroot(self):
+        return self.document
+
+    def getchildren(self, node):
+        return node.childNodes
+
+    def istag(self, node):
+        return bool(node.localName)
+
+
+if use_elementtree or use_lxml:
+    class CommonEtreeXmlVfs(XmlVfs):
+        def hasattrs(self, node):
+            return bool(node.attrib)
+
+        def collect_text(self, node):
+            text_accumulator = []
+            if node.text:
+                text = node.text.strip()
+                if text: text_accumulator.append(text)
+            for element in node:
+                if not self.istag(element):
+                    text = u"<!--%s-->" % text
+                    text_accumulator.append(text)
+            if node.tail:
+                text = node.tail.strip()
+                if text: text_accumulator.append(text)
+            return '\n'.join(text_accumulator).encode(default_encoding, "replace")
+
+        def getroot(self):
+            return self.document.getroot()
+
+        def getchildren(self, node):
+            return list(node)
+
+        def istag(self, node):
+            return isinstance(node.tag, basestring)
+
+
+if use_elementtree:
+    class ElementTreeXmlVfs(CommonEtreeXmlVfs):
+        def parse(self):
+            # Copied from http://effbot.org/zone/element-pi.ht
+
+            class PIParser(ET.XMLTreeBuilder):
+
+               def __init__(self):
+                   ET.XMLTreeBuilder.__init__(self)
+                   # assumes ElementTree 1.2.X
+                   self._parser.CommentHandler = self.handle_comment
+                   self._parser.ProcessingInstructionHandler = self.handle_pi
+                   self._target.start("document", {})
+
+               def close(self):
+                   self._target.end("document")
+                   return ET.XMLTreeBuilder.close(self)
+
+               def handle_comment(self, data):
+                   self._target.start(ET.Comment, {})
+                   self._target.data(data)
+                   self._target.end(ET.Comment)
+
+               def handle_pi(self, target, data):
+                   self._target.start(ET.PI, {})
+                   self._target.data(target + " " + data)
+                   self._target.end(ET.PI)
+
+            self.document = ET.parse(sys.argv[2], PIParser())
+
+        def attrs2text(self, node):
+            attr_accumulator = []
+            for name, value in node.attrib.items():
+                name = name.encode(default_encoding, "replace")
+                value = value.encode(default_encoding, "replace")
+                if name.startswith('{'):
+                    name = name.split('}', 1)[1] # Remove XML namespace
+                attr_accumulator.append("%s=%s" % (name, value))
+            return '\n'.join(attr_accumulator)
+
+        def _list(self, node, path=''):
+            n = len(node)
+            if n:
+                width = int(math.log10(n))+1
+                template = "%%0%dd" % width
+            else:
+                template = "%d"
+            n = 0
+            for element in node:
+                if not isinstance(element.tag, basestring):
+                    continue
+                n += 1
+                tag = element.tag
+                if tag.startswith('{'):
+                    tag = tag.split('}', 1)[1] # Remove XML namespace
+                if path:
+                    subpath = '%s/%s %s' % (path, template % n, tag)
+                else:
+                    subpath = '%s %s' % (template % n, tag)
+                subpath_encoded = subpath.encode(default_encoding, "replace")
+                print "dr-xr-xr-x 1 user group 0 Jan 1 00:00 %s" % subpath_encoded
+                if self.hasattrs(element):
+                    attr_text = self.attrs2text(element)
+                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/attributes" % (
+                        len(attr_text), subpath_encoded)
+                text = self.collect_text(element)
+                if text:
+                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/text" % (
+                        len(text), subpath_encoded)
+                self._list(element, subpath)
+
+
+if use_lxml:
+    class LxmlEtreeXmlVfs(CommonEtreeXmlVfs):
+        def parse(self):
+            self.document = etree.parse(sys.argv[2])
+
+        def attrs2text(self, node):
+            attr_accumulator = []
+            for name, value in node.attrib.items():
+                name = etree.QName(name).localname.encode(default_encoding, "replace")
+                value = value.encode(default_encoding, "replace")
+                attr_accumulator.append("%s=%s" % (name, value))
+            return '\n'.join(attr_accumulator)
+
+        def list(self):
+            self._list(self.getroot())
+
+        def _list(self, node, path=''):
+            n = len(node)
+            if n:
+                width = int(math.log10(n))+1
+                template = "%%0%dd" % width
+            else:
+                template = "%d"
+            n = 0
+            for element in node:
+                if not isinstance(element.tag, basestring):
+                    continue
+                n += 1
+                tag = etree.QName(element.tag).localname
+                if path:
+                    subpath = '%s/%s %s' % (path, template % n, tag)
+                else:
+                    subpath = '%s %s' % (template % n, tag)
+                subpath_encoded = subpath.encode(default_encoding, "replace")
+                print "dr-xr-xr-x 1 user group 0 Jan 1 00:00 %s" % subpath_encoded
+                if self.hasattrs(element):
+                    attr_text = self.attrs2text(element)
+                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/attributes" % (
+                        len(attr_text), subpath_encoded)
+                text = self.collect_text(element)
+                if text:
+                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/text" % (
+                        len(text), subpath_encoded)
+                self._list(element, subpath)
+
+        def getroot(self):
+            return [self.document.getroot()]
+
+
+def build_xmlvfs():
+    if default_implementation is None:
+        if use_lxml:
+            return LxmlEtreeXmlVfs()
+        elif use_elementtree:
+            return ElementTreeXmlVfs()
+        else:
+            return MiniDOMXmlVfs()
+    elif default_implementation == 'minidom':
+        return MiniDOMXmlVfs()
+    elif default_implementation == 'elementtree':
+        return ElementTreeXmlVfs()
+    elif default_implementation == 'lxml':
+        return LxmlEtreeXmlVfs()
+
+
+def mcxml_list():
+    """List the entire VFS"""
+
+    xmlvfs = build_xmlvfs()
+    xmlvfs.list()
+
+
+def mcxml_copyout():
+    """Extract a file from the VFS"""
+
+    xmlvfs = build_xmlvfs()
+    xml_filename = sys.argv[3]
+    real_filename = sys.argv[4]
+
+    node = xmlvfs.getroot()
+    for path_comp in xml_filename.split('/'):
+        if ' ' in path_comp:
+            i = int(path_comp.split(' ', 1)[0])
+            node = xmlvfs.get_child_node(node, i)
+        elif path_comp in ('attributes', 'text'):
+            break
+        else:
+            xml_error('Unknown file')
+
+    if path_comp == 'attributes':
+        if xmlvfs.hasattrs(node):
+            text = xmlvfs.attrs2text(node)
+        else:
+            xml_error('There are no attributes')
+
+    if path_comp == 'text':
+        text = xmlvfs.collect_text(node)
+
+    outfile = open(real_filename, 'w')
+    outfile.write(text)
+    outfile.close()
+
+
+def mcxml_copyin():
+    """Put a file to the VFS"""
+    sys.exit("XML VFS doesn't support adding files (read-only filesystem)")
+
+def mcxml_rm():
+    """Remove a file from the VFS"""
+    sys.exit("XML VFS doesn't support removing files/directories (read-only filesystem)")
+
+mcxml_rmdir = mcxml_rm
+
+def mcxml_mkdir():
+    """Create a directory in the VFS"""
+    sys.exit("XML VFS doesn't support creating directories (read-only filesystem)")
+
+
+def xml_error(error_str):
+    logger.critical("Error walking XML file: %s", error_str)
+    sys.exit(1)
+
+command = sys.argv[1]
+procname = "mcxml_" + command
+
+g = globals()
+if not g.has_key(procname):
+    logger.critical("Unknown command %s", command)
+    sys.exit(1)
+
+try:
+    g[procname]()
+except SystemExit:
+    raise
+except:
+    logger.exception("Error during run")
index bdd1bd7..e709e53 100644 (file)
@@ -5,11 +5,11 @@ WHAT IS IT
    View an XML file in Midnight Commander as a filesystem.
 
 
-WHAT'S NEW in version 0.3.2 (2013-11-19)
-   Refactored collection of text and comments nodes.
+WHAT'S NEW in version 0.5.0 (2013-11-19)
+   Added lxml.etree-based implementation.
 
-WHAT'S NEW in version 0.3.1 (2013-11-18)
-   Fixed a bug in directories permissions.
+WHAT'S NEW in version 0.4.0 (2013-11-19)
+   Added ElementTree-based implementation.
 
 WHAT'S NEW in version 0.3.0 (2013-11-16)
    Initial release.
diff --git a/xml-unified b/xml-unified
deleted file mode 100755 (executable)
index c8758a0..0000000
+++ /dev/null
@@ -1,370 +0,0 @@
-#! /usr/bin/env python
-"""XML Virtual FileSystem for Midnight Commander
-
-The script requires Midnight Commander 3.1+
-(http://www.midnight-commander.org/), Python 2.4+ (http://www.python.org/).
-
-For mc 4.7+ put the script in $HOME/[.local/share/].mc/extfs.d.
-For older versions put it in /usr/[local/][lib|share]/mc/extfs
-and add a line "xml" to the /usr/[local/][lib|share]/mc/extfs/extfs.ini.
-Make the script executable.
-
-For mc 4.7+ run this "cd" command in the Midnight Commander (in the "bindings"
-file the command is "%cd"): cd file/xml://; In older versions it is
-cd file#xml, where "file" is the name of your XML file.
-
-The VFS represents tags as directories; the directories are numbered to
-distinguish tags with the same name; also numbering helps to sort tags by their
-order in XML instead of sorting them by name. Attributes, text nodes and
-comments are represented as text files; attributes are shown in a file named
-"attributes", attributes are listed in the file as name=value lines (I
-deliberately ignore a small chance of newline characters in values); names and
-values are reencoded to the console encoding. Text nodes and comments are
-collected in a file named "text", stripped and reencoded. The filesystem is
-read-only.
-
-It is useful to have a top-down view on an XML structure but it's especially
-convenient to extract text values from tags. One can get, for example, a
-base64-encoded image - just walk down the VFS to the tag's directory and copy
-its text file to a real file.
-
-The VFS was inspired by a FUSE xmlfs: https://github.com/halhen/xmlfs
-
-"""
-
-__version__ = "0.5.0"
-__author__ = "Oleg Broytman <phd@phdru.name>"
-__copyright__ = "Copyright (C) 2013 PhiloSoft Design"
-__license__ = "GPL"
-
-default_implementation = None # Can be elementtree or minidom
-
-use_minidom = True
-use_elementtree = False
-
-import math
-import sys
-import xml.dom.minidom
-
-try:
-    import xml.etree.ElementTree as ET
-except ImportError:
-    pass
-else:
-    use_elementtree = True
-
-try:
-   import locale
-   use_locale = True
-except ImportError:
-   use_locale = False
-
-if use_locale:
-   # Get the default charset.
-   try:
-      lcAll = locale.getdefaultlocale()
-   except locale.Error, err:
-      print >>sys.stderr, "WARNING:", err
-      lcAll = []
-
-   if len(lcAll) == 2:
-      default_encoding = lcAll[1]
-   else:
-      try:
-         default_encoding = locale.getpreferredencoding()
-      except locale.Error, err:
-         print >>sys.stderr, "WARNING:", err
-         default_encoding = sys.getdefaultencoding()
-else:
-   default_encoding = sys.getdefaultencoding()
-
-import logging
-logger = logging.getLogger('xml-mcextfs')
-log_err_handler = logging.StreamHandler(sys.stderr)
-logger.addHandler(log_err_handler)
-logger.setLevel(logging.INFO)
-
-if len(sys.argv) < 3:
-    logger.critical("""\
-XML Virtual FileSystem for Midnight Commander version %s
-Author: %s
-%s
-
-This is not a program. Put the script in $HOME/[.local/share/].mc/extfs.d or
-/usr/[local/][lib|share]/mc/extfs. For more information read the source!""",
-   __version__, __author__, __copyright__
-)
-    sys.exit(1)
-
-
-locale.setlocale(locale.LC_ALL, '')
-
-
-class XmlVfs(object):
-    def __init__(self):
-        self.parse()
-
-    def list(self):
-        self._list(self.getroot())
-
-    def get_child_node(self, node, i):
-        n = 0
-        for element in self.getchildren(node):
-            if self.istag(element):
-                n += 1
-                if n == i:
-                    return element
-        xml_error('There are less than %d nodes' % i)
-
-
-class MiniDOMXmlVfs(XmlVfs):
-    def parse(self):
-        self.document = xml.dom.minidom.parse(sys.argv[2])
-
-    def hasattrs(self, node):
-        return bool(node.attributes)
-
-    def attrs2text(self, node):
-        attrs = node.attributes
-        attrs = [attrs.item(i) for i in range (attrs.length)]
-        return '\n'.join(["%s=%s" %
-            (a.name.encode(default_encoding, "replace"),
-            a.value.encode(default_encoding, "replace"))
-            for a in attrs])
-
-    def collect_text(self, node):
-        text_accumulator = []
-        for element in node.childNodes:
-            if element.localName:
-                continue
-            elif element.nodeType == element.COMMENT_NODE:
-                text = u"<!--%s-->" % element.nodeValue
-            elif element.nodeType == element.TEXT_NODE:
-                text = element.nodeValue.strip()
-            else:
-                xml_error("Unknown node type %d" % element.nodeType)
-            if text: text_accumulator.append(text)
-        return '\n'.join(text_accumulator).encode(default_encoding, "replace")
-
-    def _list(self, node, path=''):
-        childNodes = node.childNodes
-        n = 0
-        for element in childNodes:
-            if element.localName:
-                n += 1
-        if n:
-            width = int(math.log10(n))+1
-            template = "%%0%dd" % width
-        else:
-            template = "%d"
-        n = 0
-        for element in childNodes:
-            if element.localName:
-                n += 1
-                if path:
-                    subpath = '%s/%s %s' % (path, template % n, element.localName)
-                else:
-                    subpath = '%s %s' % (template % n, element.localName)
-                subpath_encoded = subpath.encode(default_encoding, "replace")
-                print "dr-xr-xr-x 1 user group 0 Jan 1 00:00 %s" % subpath_encoded
-                if self.hasattrs(element):
-                    attr_text = self.attrs2text(element)
-                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/attributes" % (
-                        len(attr_text), subpath_encoded)
-                text = self.collect_text(element)
-                if text:
-                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/text" % (
-                        len(text), subpath_encoded)
-                self._list(element, subpath)
-
-    def getroot(self):
-        return self.document
-
-    def getchildren(self, node):
-        return node.childNodes
-
-    def istag(self, node):
-        return bool(node.localName)
-
-
-if use_elementtree:
-    class ElementTreeXmlVfs(XmlVfs):
-        def parse(self):
-            # Copied from http://effbot.org/zone/element-pi.ht
-
-            class PIParser(ET.XMLTreeBuilder):
-
-               def __init__(self):
-                   ET.XMLTreeBuilder.__init__(self)
-                   # assumes ElementTree 1.2.X
-                   self._parser.CommentHandler = self.handle_comment
-                   self._parser.ProcessingInstructionHandler = self.handle_pi
-                   self._target.start("document", {})
-
-               def close(self):
-                   self._target.end("document")
-                   return ET.XMLTreeBuilder.close(self)
-
-               def handle_comment(self, data):
-                   self._target.start(ET.Comment, {})
-                   self._target.data(data)
-                   self._target.end(ET.Comment)
-
-               def handle_pi(self, target, data):
-                   self._target.start(ET.PI, {})
-                   self._target.data(target + " " + data)
-                   self._target.end(ET.PI)
-
-            self.document = ET.parse(sys.argv[2], PIParser())
-
-        def hasattrs(self, node):
-            return bool(node.attrib)
-
-        def attrs2text(self, node):
-            attr_accumulator = []
-            for name, value in node.attrib.items():
-                name = name.encode(default_encoding, "replace")
-                value = value.encode(default_encoding, "replace")
-                if name.startswith('{'):
-                    name = name.split('}', 1)[1] # Remove XML namespace
-                attr_accumulator.append("%s=%s" % (name, value))
-            return '\n'.join(attr_accumulator)
-
-        def collect_text(self, node):
-            text_accumulator = []
-            if node.text:
-                text = node.text.strip()
-                if text: text_accumulator.append(text)
-            for element in node:
-                if element.tag is ET.Comment:
-                    text = u"<!--%s-->" % text
-                    text_accumulator.append(text)
-            if node.tail:
-                text = node.tail.strip()
-                if text: text_accumulator.append(text)
-            return '\n'.join(text_accumulator).encode(default_encoding, "replace")
-
-        def _list(self, node, path=''):
-            n = len(node)
-            if n:
-                width = int(math.log10(n))+1
-                template = "%%0%dd" % width
-            else:
-                template = "%d"
-            n = 0
-            for element in node:
-                if not isinstance(element.tag, basestring):
-                    continue
-                n += 1
-                tag = element.tag
-                if tag.startswith('{'):
-                    tag = tag.split('}', 1)[1] # Remove XML namespace
-                if path:
-                    subpath = '%s/%s %s' % (path, template % n, tag)
-                else:
-                    subpath = '%s %s' % (template % n, tag)
-                subpath_encoded = subpath.encode(default_encoding, "replace")
-                print "dr-xr-xr-x 1 user group 0 Jan 1 00:00 %s" % subpath_encoded
-                if self.hasattrs(element):
-                    attr_text = self.attrs2text(element)
-                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/attributes" % (
-                        len(attr_text), subpath_encoded)
-                text = self.collect_text(element)
-                if text:
-                    print "-r--r--r-- 1 user group %d Jan 1 00:00 %s/text" % (
-                        len(text), subpath_encoded)
-                self._list(element, subpath)
-
-        def getroot(self):
-            return self.document.getroot()
-
-        def getchildren(self, node):
-            return list(node)
-
-        def istag(self, node):
-            return isinstance(node.tag, basestring)
-
-
-def build_xmlvfs():
-    if default_implementation is None:
-        if use_elementtree:
-            return ElementTreeXmlVfs()
-        else:
-            return MiniDOMXmlVfs()
-    elif default_implementation == 'minidom':
-        return MiniDOMXmlVfs()
-    elif default_implementation == 'elementtree':
-        return ElementTreeXmlVfs()
-
-
-def mcxml_list():
-    """List the entire VFS"""
-
-    xmlvfs = build_xmlvfs()
-    xmlvfs.list()
-
-
-def mcxml_copyout():
-    """Extract a file from the VFS"""
-
-    xmlvfs = build_xmlvfs()
-    xml_filename = sys.argv[3]
-    real_filename = sys.argv[4]
-
-    node = xmlvfs.getroot()
-    for path_comp in xml_filename.split('/'):
-        if ' ' in path_comp:
-            i = int(path_comp.split(' ', 1)[0])
-            node = xmlvfs.get_child_node(node, i)
-        elif path_comp in ('attributes', 'text'):
-            break
-        else:
-            xml_error('Unknown file')
-
-    if path_comp == 'attributes':
-        if xmlvfs.hasattrs(node):
-            text = xmlvfs.attrs2text(node)
-        else:
-            xml_error('There are no attributes')
-
-    if path_comp == 'text':
-        text = xmlvfs.collect_text(node)
-
-    outfile = open(real_filename, 'w')
-    outfile.write(text)
-    outfile.close()
-
-
-def mcxml_copyin():
-    """Put a file to the VFS"""
-    sys.exit("XML VFS doesn't support adding files (read-only filesystem)")
-
-def mcxml_rm():
-    """Remove a file from the VFS"""
-    sys.exit("XML VFS doesn't support removing files/directories (read-only filesystem)")
-
-mcxml_rmdir = mcxml_rm
-
-def mcxml_mkdir():
-    """Create a directory in the VFS"""
-    sys.exit("XML VFS doesn't support creating directories (read-only filesystem)")
-
-
-def xml_error(error_str):
-    logger.critical("Error walking XML file: %s", error_str)
-    sys.exit(1)
-
-command = sys.argv[1]
-procname = "mcxml_" + command
-
-g = globals()
-if not g.has_key(procname):
-    logger.critical("Unknown command %s", command)
-    sys.exit(1)
-
-try:
-    g[procname]()
-except SystemExit:
-    raise
-except:
-    logger.exception("Error during run")