def span(self, path):
"""Get the span according to input file of the node associated with
PATH. If the node is associated with a file, un tuple of 5 elements is
returned: (filename, label_start, label_end, value_start, value_end,
span_start, span_end). If the node associated with PATH doesn't
belong to a file or is doesn't exists, ValueError is raised."""
# Sanity checks
if not isinstance(path, string_types):
raise TypeError("path MUST be a string!")
if not self.__handle:
raise RuntimeError("The Augeas object has already been closed!")
# TODO: Rewrite this
filename = ffi.new('char **')
label_start = ffi.new('unsigned int *')
label_end = ffi.new('unsigned int *')
value_start = ffi.new('unsigned int *')
value_end = ffi.new('unsigned int *')
span_start = ffi.new('unsigned int *')
span_end = ffi.new('unsigned int *')
ret = lib.aug_span(self.__handle, enc(path), filename, label_start,
label_end, value_start, value_end, span_start,
span_end)
if (ret < 0):
raise ValueError("Error during span procedure")
fname = dec(ffi.string(filename[0])) if filename != ffi.NULL else None
return (fname, int(label_start[0]), int(label_end[0]),
int(value_start[0]), int(value_end[0]), int(span_start[0]),
int(span_end[0]))
def match(self, path, value=None):
"""Return the matches of the path expression 'path'. The returned paths
are sufficiently qualified to make sure that they match exactly one
node in the current tree.
Path expressions use a very simple subset of XPath: the path 'path'
consists of a number of segments, separated by '/'; each segment can
either be a '*', matching any tree node, or a string, optionally
followed by an index in brackets, matching tree nodes labelled with
exactly that string. If no index is specified, the expression matches
all nodes with that label; the index can be a positive number N, which
matches exactly the Nth node with that label (counting from 1), or the
special expression 'last()' which matches the last node with the given
label. All matches are done in fixed positions in the tree, and nothing
matches more than one path segment."""
# Sanity checks
if not isinstance(path, string_types):
raise TypeError("path MUST be a string!")
if not isinstance(value, string_types) and value is not None:
raise TypeError("value MUST be a string or None!")
if not self.__handle:
raise RuntimeError("The Augeas object has already been closed!")
parray = ffi.new('char***')
ret = lib.aug_match(self.__handle, enc(path), parray)
if ret < 0:
raise RuntimeError("Error during match procedure!", path)
# Loop through the string array
array = parray[0]
matches = []
for i in range(ret):
if array[i] != ffi.NULL:
# Create a python string and append it to our matches list
item = ffi.string(array[i])
if value is not None:
matched_value = self.get(item)
if matched_value == value:
matches.append(dec(item))
else:
matches.append(dec(item))
lib.free(array[i])
lib.free(array)
return matches
def match(self, path):
"""
Return the matches of the path expression `path`. The returned paths
are sufficiently qualified to make sure that they match exactly one
node in the current tree.
Path expressions use a very simple subset of XPath: the path `path`
consists of a number of segments, separated by :samp:`/`; each segment
can either be a :samp:`*`, matching any tree node, or a string,
optionally followed by an index in brackets, matching tree nodes
labelled with exactly that string. If no index is specified, the
expression matches all nodes with that label; the index can be a
positive number N, which matches exactly the *N*-th node with that
label (counting from 1), or the special expression :samp:`last()` which
matches the last node with the given label. All matches are done in
fixed positions in the tree, and nothing matches more than one path
segment.
"""
# Sanity checks
if not isinstance(path, string_types):
raise TypeError("path MUST be a string!")
if not self.__handle:
raise RuntimeError("The Augeas object has already been closed!")
parray = ffi.new('char***')
ret = lib.aug_match(self.__handle, enc(path), parray)
if ret < 0:
self._raise_error(AugeasRuntimeError,
"Augeas.match() failed: %s", path)
# Loop through the string array
array = parray[0]
matches = []
for i in range(ret):
if array[i] != ffi.NULL:
# Create a python string and append it to our matches list
item = ffi.string(array[i])
matches.append(dec(item))
lib.free(array[i])
lib.free(array)
return matches
def label(self, path):
"""Lookup the label associated with 'path'.
Returns the label of the path specified.
It is an error if more than one node matches 'path'."""
# Sanity checks
if not isinstance(path, string_types):
raise TypeError("path MUST be a string!")
if not self.__handle:
raise RuntimeError("The Augeas object has already been closed!")
# Create the char * value
label = ffi.new("char*[]", 1)
# Call the function and pass value by reference (char **)
ret = lib.aug_label(self.__handle, enc(path), label)
if ret > 1:
raise ValueError("path specified had too many matches!")
return dec(ffi.string(label[0])) if label[0] != ffi.NULL else None
def _optffistring(self, cffistr):
if cffistr == ffi.NULL:
return None
else:
return dec(ffi.string(cffistr))
