def main():
print("""\
<?xml version="1.0" encoding="UTF-8"?>
<dfxml
xmlns="%s"
xmlns:delta="%s"
version="1.1.0">
<creator>
<program>%s</program>
<version>%s</version>
<execution_environment>
<command_line>%s</command_line>
</execution_environment>
</creator>
<source>
<image_filename>%s</image_filename>
</source>\
""" % (dfxml.XMLNS_DFXML, dfxml.XMLNS_DELTA, sys.argv[0], __version__,
" ".join(sys.argv), args.filename))
ET.register_namespace("delta", dfxml.XMLNS_DELTA)
xs = []
for fi in dfxml.iter_dfxml(xmlfile=open(args.filename, "rb"),
preserve_elements=True):
_logger.debug("Processing: %s" % str(fi))
if args.cache:
xs.append(fi.xml_element)
else:
_logger.debug("Printing without cache: %s" % str(fi))
print(dfxml.ET_tostring(fi.xml_element, encoding="unicode"))
if args.cache:
for x in xs:
_logger.debug("Printing with cache: %s" % str(fi))
print(dfxml.ET_tostring(x, encoding="unicode"))
print("""</dfxml>""")
def to_xml(self):
import xml.etree.ElementTree as ET
ET.register_namespace("delta", dfxml.XMLNS_DELTA)
if not options.xmlfilename:
sys.stderr.write("XML output filename not specified.\n")
exit(1)
metadict = dict()
metadict["XMLNS_DFXML"] = dfxml.XMLNS_DFXML
metadict["XMLNS_DELTA"] = dfxml.XMLNS_DELTA
metadict["program"] = sys.argv[0]
metadict["version"] = __version__
metadict["commandline"] = " ".join(sys.argv)
metadict["priorf"] = self.prior_fname
metadict["currentf"] = self.current_fname
xmlfile = open(options.xmlfilename, "w")
xmlfile.write("""\
<?xml version="1.0" encoding="UTF-8"?>
<dfxml
version="1.0"
xmlns='%(XMLNS_DFXML)s'
xmlns:dc='http://purl.org/dc/elements/1.1/'
xmlns:delta='%(XMLNS_DELTA)s'
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
<metadata>
<dc:type>Disk Image Difference Manifest</dc:type>
</metadata>
<creator>
<program>%(program)s</program>
<version>%(version)s</version>
<execution_environment>
<command_line>%(commandline)s</command_line>
</execution_environment>
</creator>
<source>
<image_filename>%(priorf)s</image_filename>
<image_filename>%(currentf)s</image_filename>
</source>
""" % metadict)
def _annotate_changes(tmpel, ofi, fi):
"""
Adds "delta:changed_property" attributes to elements that changed their values.
Returns number of annotations needed.
"""
retval = 0
def _xpaths(xp):
"""
Returns a list of xpaths: First, with an xmlns; second, as input.
@param xp
An xpath expression where all elements and attributes needing a namespace declaration are prefixed with "{0}" (for Python string formatting).
"""
retval = []
for nsprefix in ["{" + dfxml.XMLNS_DFXML + "}", ""]:
retval.append(xp.format(nsprefix))
return retval
# Triplets: Old value, new value, XPaths to find element to annotate
for (oval, nval, xpaths) in [
(ofi.filename(), fi.filename(), _xpaths("./{0}filename")),
(ofi.sha1(), fi.sha1(),
_xpaths("./{0}hashdigest[@type='sha1']")),
(ofi.md5(), fi.md5(), _xpaths("./{0}hashdigest[@type='md5']")),
(ofi.mtime(), fi.mtime(), _xpaths("./{0}mtime")),
(ofi.atime(), fi.atime(), _xpaths("./{0}atime")),
(ofi.ctime(), fi.ctime(), _xpaths("./{0}ctime")),
(ofi.crtime(), fi.crtime(), _xpaths("./{0}crtime")),
(ofi.filesize(), fi.filesize(), _xpaths("./{0}filesize"))
]:
#Find and flag the changed properties
#Skip null-null comparisons
if oval is None and nval is None:
continue
if oval != nval:
retval += 1
#Find first namespace match for the property element
for xp in xpaths:
propertyel = tmpel.find(xp)
if not propertyel is None:
break
if propertyel is None:
comment = ET.Comment(
"Warning: Tried to note a changed property with the XPath queries %r; however, could not find the element."
% xpaths)
tmpel.insert(0, comment)
else:
propertyel.attrib["delta:changed_property"] = "1"
return retval
#List new files
for fi in self.new_files:
#xmlfile.write(" <!-- + %s -->\n" % fi.filename())
xmlfile.write(" ")
tmpel = copy.copy(fi.xml_element)
tmpel.attrib["delta:new_file"] = "1"
xmlfile.write(dfxml.ET_tostring(tmpel, encoding="unicode"))
xmlfile.write("\n")
#List deleted files
for fi in self.fnames.values():
#xmlfile.write("<!-- - %s -->\n" % fi.filename())
xmlfile.write(" ")
tmpel = ET.Element("fileobject")
tmpel.attrib["delta:deleted_file"] = "1"
tmpchild = copy.copy(fi.xml_element)
tmpchild.tag = "delta:original_fileobject"
tmpel.insert(-1, tmpchild)
xmlfile.write(dfxml.ET_tostring(tmpel, encoding="unicode"))
xmlfile.write("\n")
#List renamed files
for (ofi, fi) in self.renamed_files:
#xmlfile.write("<!-- ! %s -> %s -->\n" % (ofi.filename(), fi.filename()))
tmpel = copy.copy(fi.xml_element)
annos = _annotate_changes(tmpel, ofi, fi)
tmpoldel = copy.copy(ofi.xml_element)
tmpoldel.tag = "delta:original_fileobject"
tmpel.append(tmpoldel)
tmpel.attrib["delta:renamed_file"] = "1"
if annos > 1:
tmpel.attrib["delta:changed_file"] = "1"
xmlfile.write(dfxml.ET_tostring(tmpel, encoding="unicode"))
xmlfile.write("\n")
#List files with with modified data or metadata
changed_files = set.union(set(self.changed_content),
set(self.changed_properties))
for (ofi, fi) in changed_files:
#xmlfile.write("<!-- ~ %s -->\n" % fi.filename())
xmlfile.write(" ")
tmpel = copy.copy(fi.xml_element)
_annotate_changes(tmpel, ofi, fi)
tmpoldel = copy.copy(ofi.xml_element)
tmpoldel.tag = "delta:original_fileobject"
tmpel.append(tmpoldel)
tmpel.attrib["delta:changed_file"] = "1"
xmlfile.write(dfxml.ET_tostring(tmpel, encoding="unicode"))
xmlfile.write("\n")
xmlfile.write("</dfxml>\n")
xmlfile.close()