194 lines
8.5 KiB
Python
Executable File
194 lines
8.5 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
# -*- coding: utf-8; mode: python -*-
|
|
# pylint: disable=R0903, C0330, R0914, R0912, E0401
|
|
|
|
u"""
|
|
kernel-include
|
|
~~~~~~~~~~~~~~
|
|
|
|
Implementation of the ``kernel-include`` reST-directive.
|
|
|
|
:copyright: Copyright (C) 2016 Markus Heiser
|
|
:license: GPL Version 2, June 1991 see linux/COPYING for details.
|
|
|
|
The ``kernel-include`` reST-directive is a replacement for the ``include``
|
|
directive. The ``kernel-include`` directive expand environment variables in
|
|
the path name and allows to include files from arbitrary locations.
|
|
|
|
.. hint::
|
|
|
|
Including files from arbitrary locations (e.g. from ``/etc``) is a
|
|
security risk for builders. This is why the ``include`` directive from
|
|
docutils *prohibit* pathnames pointing to locations *above* the filesystem
|
|
tree where the reST document with the include directive is placed.
|
|
|
|
Substrings of the form $name or ${name} are replaced by the value of
|
|
environment variable name. Malformed variable names and references to
|
|
non-existing variables are left unchanged.
|
|
"""
|
|
|
|
# ==============================================================================
|
|
# imports
|
|
# ==============================================================================
|
|
|
|
import os.path
|
|
|
|
from docutils import io, nodes, statemachine
|
|
from docutils.utils.error_reporting import SafeString, ErrorString
|
|
from docutils.parsers.rst import directives
|
|
from docutils.parsers.rst.directives.body import CodeBlock, NumberLines
|
|
from docutils.parsers.rst.directives.misc import Include
|
|
|
|
__version__ = '1.0'
|
|
|
|
# ==============================================================================
|
|
def setup(app):
|
|
# ==============================================================================
|
|
|
|
app.add_directive("kernel-include", KernelInclude)
|
|
return dict(
|
|
version = __version__,
|
|
parallel_read_safe = True,
|
|
parallel_write_safe = True
|
|
)
|
|
|
|
# ==============================================================================
|
|
class KernelInclude(Include):
|
|
# ==============================================================================
|
|
|
|
u"""KernelInclude (``kernel-include``) directive"""
|
|
|
|
def run(self):
|
|
env = self.state.document.settings.env
|
|
path = os.path.realpath(
|
|
os.path.expandvars(self.arguments[0]))
|
|
|
|
# to get a bit security back, prohibit /etc:
|
|
if path.startswith(os.sep + "etc"):
|
|
raise self.severe(
|
|
'Problems with "%s" directive, prohibited path: %s'
|
|
% (self.name, path))
|
|
|
|
self.arguments[0] = path
|
|
|
|
env.note_dependency(os.path.abspath(path))
|
|
|
|
#return super(KernelInclude, self).run() # won't work, see HINTs in _run()
|
|
return self._run()
|
|
|
|
def _run(self):
|
|
"""Include a file as part of the content of this reST file."""
|
|
|
|
# HINT: I had to copy&paste the whole Include.run method. I'am not happy
|
|
# with this, but due to security reasons, the Include.run method does
|
|
# not allow absolute or relative pathnames pointing to locations *above*
|
|
# the filesystem tree where the reST document is placed.
|
|
|
|
if not self.state.document.settings.file_insertion_enabled:
|
|
raise self.warning('"%s" directive disabled.' % self.name)
|
|
source = self.state_machine.input_lines.source(
|
|
self.lineno - self.state_machine.input_offset - 1)
|
|
source_dir = os.path.dirname(os.path.abspath(source))
|
|
path = directives.path(self.arguments[0])
|
|
if path.startswith('<') and path.endswith('>'):
|
|
path = os.path.join(self.standard_include_path, path[1:-1])
|
|
path = os.path.normpath(os.path.join(source_dir, path))
|
|
|
|
# HINT: this is the only line I had to change / commented out:
|
|
#path = utils.relative_path(None, path)
|
|
|
|
path = nodes.reprunicode(path)
|
|
encoding = self.options.get(
|
|
'encoding', self.state.document.settings.input_encoding)
|
|
e_handler=self.state.document.settings.input_encoding_error_handler
|
|
tab_width = self.options.get(
|
|
'tab-width', self.state.document.settings.tab_width)
|
|
try:
|
|
self.state.document.settings.record_dependencies.add(path)
|
|
include_file = io.FileInput(source_path=path,
|
|
encoding=encoding,
|
|
error_handler=e_handler)
|
|
except UnicodeEncodeError as error:
|
|
raise self.severe('Problems with "%s" directive path:\n'
|
|
'Cannot encode input file path "%s" '
|
|
'(wrong locale?).' %
|
|
(self.name, SafeString(path)))
|
|
except IOError as error:
|
|
raise self.severe('Problems with "%s" directive path:\n%s.' %
|
|
(self.name, ErrorString(error)))
|
|
startline = self.options.get('start-line', None)
|
|
endline = self.options.get('end-line', None)
|
|
try:
|
|
if startline or (endline is not None):
|
|
lines = include_file.readlines()
|
|
rawtext = ''.join(lines[startline:endline])
|
|
else:
|
|
rawtext = include_file.read()
|
|
except UnicodeError as error:
|
|
raise self.severe('Problem with "%s" directive:\n%s' %
|
|
(self.name, ErrorString(error)))
|
|
# start-after/end-before: no restrictions on newlines in match-text,
|
|
# and no restrictions on matching inside lines vs. line boundaries
|
|
after_text = self.options.get('start-after', None)
|
|
if after_text:
|
|
# skip content in rawtext before *and incl.* a matching text
|
|
after_index = rawtext.find(after_text)
|
|
if after_index < 0:
|
|
raise self.severe('Problem with "start-after" option of "%s" '
|
|
'directive:\nText not found.' % self.name)
|
|
rawtext = rawtext[after_index + len(after_text):]
|
|
before_text = self.options.get('end-before', None)
|
|
if before_text:
|
|
# skip content in rawtext after *and incl.* a matching text
|
|
before_index = rawtext.find(before_text)
|
|
if before_index < 0:
|
|
raise self.severe('Problem with "end-before" option of "%s" '
|
|
'directive:\nText not found.' % self.name)
|
|
rawtext = rawtext[:before_index]
|
|
|
|
include_lines = statemachine.string2lines(rawtext, tab_width,
|
|
convert_whitespace=True)
|
|
if 'literal' in self.options:
|
|
# Convert tabs to spaces, if `tab_width` is positive.
|
|
if tab_width >= 0:
|
|
text = rawtext.expandtabs(tab_width)
|
|
else:
|
|
text = rawtext
|
|
literal_block = nodes.literal_block(rawtext, source=path,
|
|
classes=self.options.get('class', []))
|
|
literal_block.line = 1
|
|
self.add_name(literal_block)
|
|
if 'number-lines' in self.options:
|
|
try:
|
|
startline = int(self.options['number-lines'] or 1)
|
|
except ValueError:
|
|
raise self.error(':number-lines: with non-integer '
|
|
'start value')
|
|
endline = startline + len(include_lines)
|
|
if text.endswith('\n'):
|
|
text = text[:-1]
|
|
tokens = NumberLines([([], text)], startline, endline)
|
|
for classes, value in tokens:
|
|
if classes:
|
|
literal_block += nodes.inline(value, value,
|
|
classes=classes)
|
|
else:
|
|
literal_block += nodes.Text(value, value)
|
|
else:
|
|
literal_block += nodes.Text(text, text)
|
|
return [literal_block]
|
|
if 'code' in self.options:
|
|
self.options['source'] = path
|
|
codeblock = CodeBlock(self.name,
|
|
[self.options.pop('code')], # arguments
|
|
self.options,
|
|
include_lines, # content
|
|
self.lineno,
|
|
self.content_offset,
|
|
self.block_text,
|
|
self.state,
|
|
self.state_machine)
|
|
return codeblock.run()
|
|
self.state_machine.insert_input(include_lines, path)
|
|
return []
|