root / lib / build / sphinx_ext.py @ f7f03738
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# Copyright (C) 2011, 2012, 2013 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Sphinx extension for building opcode documentation.
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"""
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import re |
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from cStringIO import StringIO |
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import docutils.statemachine |
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import docutils.nodes |
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import docutils.utils |
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import docutils.parsers.rst |
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import sphinx.errors |
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import sphinx.util.compat |
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import sphinx.roles |
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import sphinx.addnodes |
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s_compat = sphinx.util.compat |
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try:
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# Access to a protected member of a client class
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# pylint: disable=W0212
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orig_manpage_role = docutils.parsers.rst.roles._roles["manpage"]
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except (AttributeError, ValueError, KeyError), err: |
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# Normally the "manpage" role is registered by sphinx/roles.py
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raise Exception("Can't find reST role named 'manpage': %s" % err) |
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from ganeti import constants |
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from ganeti import compat |
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from ganeti import errors |
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from ganeti import utils |
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from ganeti import opcodes |
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from ganeti import ht |
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from ganeti import rapi |
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from ganeti import luxi |
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from ganeti import objects |
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from ganeti import http |
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from ganeti import _autoconf |
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import ganeti.rapi.rlib2 # pylint: disable=W0611 |
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import ganeti.rapi.connector # pylint: disable=W0611 |
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#: Regular expression for man page names
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_MAN_RE = re.compile(r"^(?P<name>[-\w_]+)\((?P<section>\d+)\)$")
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_TAB_WIDTH = 2
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RAPI_URI_ENCODE_RE = re.compile("[^_a-z0-9]+", re.I)
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class ReSTError(Exception): |
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"""Custom class for generating errors in Sphinx.
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"""
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def _GetCommonParamNames(): |
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"""Builds a list of parameters common to all opcodes.
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"""
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names = set(map(compat.fst, opcodes.OpCode.OP_PARAMS)) |
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# The "depends" attribute should be listed
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names.remove(opcodes.DEPEND_ATTR) |
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return names
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COMMON_PARAM_NAMES = _GetCommonParamNames() |
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#: Namespace for evaluating expressions
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EVAL_NS = dict(compat=compat, constants=constants, utils=utils, errors=errors,
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rlib2=rapi.rlib2, luxi=luxi, rapi=rapi, objects=objects, |
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http=http) |
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# Constants documentation for man pages
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CV_ECODES_DOC = "ecodes"
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# We don't care about the leak of variables _, name and doc here.
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# pylint: disable=W0621
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CV_ECODES_DOC_LIST = [(name, doc) for (_, name, doc) in constants.CV_ALL_ECODES] |
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DOCUMENTED_CONSTANTS = { |
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CV_ECODES_DOC: CV_ECODES_DOC_LIST, |
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} |
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class OpcodeError(sphinx.errors.SphinxError): |
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category = "Opcode error"
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def _SplitOption(text): |
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"""Split simple option list.
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@type text: string
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@param text: Options, e.g. "foo, bar, baz"
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"""
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return [i.strip(",").strip() for i in text.split()] |
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def _ParseAlias(text): |
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"""Parse simple assignment option.
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@type text: string
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@param text: Assignments, e.g. "foo=bar, hello=world"
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@rtype: dict
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"""
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result = {} |
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for part in _SplitOption(text): |
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if "=" not in part: |
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raise OpcodeError("Invalid option format, missing equal sign") |
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(name, value) = part.split("=", 1) |
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result[name.strip()] = value.strip() |
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return result
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def _BuildOpcodeParams(op_id, include, exclude, alias): |
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"""Build opcode parameter documentation.
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@type op_id: string
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@param op_id: Opcode ID
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"""
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op_cls = opcodes.OP_MAPPING[op_id] |
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params_with_alias = \ |
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utils.NiceSort([(alias.get(name, name), name, default, test, doc) |
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for (name, default, test, doc) in op_cls.GetAllParams()], |
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key=compat.fst) |
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for (rapi_name, name, default, test, doc) in params_with_alias: |
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# Hide common parameters if not explicitly included
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if (name in COMMON_PARAM_NAMES and |
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(not include or name not in include)): |
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continue
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if exclude is not None and name in exclude: |
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continue
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if include is not None and name not in include: |
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continue
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has_default = default is not ht.NoDefault |
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has_test = not (test is None or test is ht.NoType) |
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buf = StringIO() |
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buf.write("``%s``" % (rapi_name,))
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if has_default or has_test: |
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buf.write(" (")
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if has_default:
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buf.write("defaults to ``%s``" % (default,))
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if has_test:
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buf.write(", ")
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if has_test:
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buf.write("must be ``%s``" % (test,))
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buf.write(")")
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yield buf.getvalue()
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# Add text
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for line in doc.splitlines(): |
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yield " %s" % line |
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def _BuildOpcodeResult(op_id): |
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"""Build opcode result documentation.
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@type op_id: string
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@param op_id: Opcode ID
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"""
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op_cls = opcodes.OP_MAPPING[op_id] |
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result_fn = getattr(op_cls, "OP_RESULT", None) |
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if not result_fn: |
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raise OpcodeError("Opcode '%s' has no result description" % op_id) |
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return "``%s``" % result_fn |
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class OpcodeParams(s_compat.Directive): |
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"""Custom directive for opcode parameters.
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See also <http://docutils.sourceforge.net/docs/howto/rst-directives.html>.
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"""
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has_content = False
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required_arguments = 1
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optional_arguments = 0
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final_argument_whitespace = False
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option_spec = dict(include=_SplitOption, exclude=_SplitOption,
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alias=_ParseAlias) |
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def run(self): |
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op_id = self.arguments[0] |
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include = self.options.get("include", None) |
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exclude = self.options.get("exclude", None) |
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alias = self.options.get("alias", {}) |
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path = op_id |
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include_text = "\n".join(_BuildOpcodeParams(op_id, include, exclude, alias))
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# Inject into state machine
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include_lines = docutils.statemachine.string2lines(include_text, _TAB_WIDTH, |
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convert_whitespace=1)
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self.state_machine.insert_input(include_lines, path)
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return []
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class OpcodeResult(s_compat.Directive): |
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"""Custom directive for opcode result.
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See also <http://docutils.sourceforge.net/docs/howto/rst-directives.html>.
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"""
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has_content = False
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required_arguments = 1
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optional_arguments = 0
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final_argument_whitespace = False
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def run(self): |
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op_id = self.arguments[0] |
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path = op_id |
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include_text = _BuildOpcodeResult(op_id) |
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# Inject into state machine
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include_lines = docutils.statemachine.string2lines(include_text, _TAB_WIDTH, |
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convert_whitespace=1)
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self.state_machine.insert_input(include_lines, path)
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return []
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def PythonEvalRole(role, rawtext, text, lineno, inliner, |
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options={}, content=[]): |
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"""Custom role to evaluate Python expressions.
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The expression's result is included as a literal.
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"""
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# pylint: disable=W0102,W0613,W0142
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# W0102: Dangerous default value as argument
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# W0142: Used * or ** magic
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# W0613: Unused argument
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code = docutils.utils.unescape(text, restore_backslashes=True)
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try:
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result = eval(code, EVAL_NS)
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except Exception, err: # pylint: disable=W0703 |
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msg = inliner.reporter.error("Failed to evaluate %r: %s" % (code, err),
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line=lineno) |
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return ([inliner.problematic(rawtext, rawtext, msg)], [msg])
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node = docutils.nodes.literal("", unicode(result), **options) |
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return ([node], [])
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class PythonAssert(s_compat.Directive): |
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"""Custom directive for writing assertions.
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The content must be a valid Python expression. If its result does not
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evaluate to C{True}, the assertion fails.
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"""
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has_content = True
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required_arguments = 0
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optional_arguments = 0
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final_argument_whitespace = False
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def run(self): |
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# Handle combinations of Sphinx and docutils not providing the wanted method
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if hasattr(self, "assert_has_content"): |
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self.assert_has_content()
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else:
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assert self.content |
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code = "\n".join(self.content) |
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try:
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result = eval(code, EVAL_NS)
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except Exception, err: |
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raise self.error("Failed to evaluate %r: %s" % (code, err)) |
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if not result: |
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raise self.error("Assertion failed: %s" % (code, )) |
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return []
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def BuildQueryFields(fields): |
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"""Build query fields documentation.
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@type fields: dict (field name as key, field details as value)
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"""
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defs = [(fdef.name, fdef.doc) |
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for (_, (fdef, _, _, _)) in utils.NiceSort(fields.items(), |
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key=compat.fst)] |
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return BuildValuesDoc(defs)
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def BuildValuesDoc(values): |
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"""Builds documentation for a list of values
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@type values: list of tuples in the form (value, documentation)
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"""
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for name, doc in values: |
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assert len(doc.splitlines()) == 1 |
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yield "``%s``" % (name,) |
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yield " %s" % (doc,) |
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def _ManPageNodeClass(*args, **kwargs): |
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"""Generates a pending XRef like a ":doc:`...`" reference.
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"""
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# Type for sphinx/environment.py:BuildEnvironment.resolve_references
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kwargs["reftype"] = "doc" |
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# Force custom title
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kwargs["refexplicit"] = True |
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return sphinx.addnodes.pending_xref(*args, **kwargs)
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class _ManPageXRefRole(sphinx.roles.XRefRole): |
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def __init__(self): |
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"""Initializes this class.
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"""
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sphinx.roles.XRefRole.__init__(self, nodeclass=_ManPageNodeClass,
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warn_dangling=True)
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assert not hasattr(self, "converted"), \ |
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"Sphinx base class gained an attribute named 'converted'"
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self.converted = None |
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def process_link(self, env, refnode, has_explicit_title, title, target): |
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"""Specialization for man page links.
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"""
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if has_explicit_title:
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raise ReSTError("Setting explicit title is not allowed for man pages") |
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# Check format and extract name and section
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m = _MAN_RE.match(title) |
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if not m: |
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raise ReSTError("Man page reference '%s' does not match regular" |
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" expression '%s'" % (title, _MAN_RE.pattern))
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name = m.group("name")
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section = int(m.group("section")) |
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wanted_section = _autoconf.MAN_PAGES.get(name, None)
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if not (wanted_section is None or wanted_section == section): |
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raise ReSTError("Referenced man page '%s' has section number %s, but the" |
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" reference uses section %s" %
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(name, wanted_section, section)) |
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self.converted = bool(wanted_section is not None and |
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env.app.config.enable_manpages) |
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if self.converted: |
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# Create link to known man page
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return (title, "man-%s" % name) |
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else:
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# No changes
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return (title, target)
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def _ManPageRole(typ, rawtext, text, lineno, inliner, # pylint: disable=W0102 |
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options={}, content=[]): |
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"""Custom role for man page references.
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Converts man pages to links if enabled during the build.
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"""
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xref = _ManPageXRefRole() |
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assert ht.TNone(xref.converted)
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# Check if it's a known man page
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try:
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result = xref(typ, rawtext, text, lineno, inliner, |
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options=options, content=content) |
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except ReSTError, err:
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msg = inliner.reporter.error(str(err), line=lineno)
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return ([inliner.problematic(rawtext, rawtext, msg)], [msg])
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assert ht.TBool(xref.converted)
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# Return if the conversion was successful (i.e. the man page was known and
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# conversion was enabled)
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if xref.converted:
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return result
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# Fallback if man page links are disabled or an unknown page is referenced
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return orig_manpage_role(typ, rawtext, text, lineno, inliner,
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options=options, content=content) |
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def _EncodeRapiResourceLink(method, uri): |
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"""Encodes a RAPI resource URI for use as a link target.
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"""
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parts = [RAPI_URI_ENCODE_RE.sub("-", uri.lower()).strip("-")] |
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if method is not None: |
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parts.append(method.lower()) |
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return "rapi-res-%s" % "+".join(filter(None, parts)) |
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def _MakeRapiResourceLink(method, uri): |
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"""Generates link target name for RAPI resource.
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"""
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if uri in ["/", "/2"]: |
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# Don't link these
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return None |
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elif uri == "/version": |
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return _EncodeRapiResourceLink(method, uri)
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elif uri.startswith("/2/"): |
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return _EncodeRapiResourceLink(method, uri[len("/2/"):]) |
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else:
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raise ReSTError("Unhandled URI '%s'" % uri) |
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def _GetHandlerMethods(handler): |
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"""Returns list of HTTP methods supported by handler class.
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@type handler: L{rapi.baserlib.ResourceBase}
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@param handler: Handler class
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@rtype: list of strings
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"""
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return sorted(method |
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for (method, op_attr, _, _) in rapi.baserlib.OPCODE_ATTRS |
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# Only if handler supports method
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if hasattr(handler, method) or hasattr(handler, op_attr)) |
475 |
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def _DescribeHandlerAccess(handler, method): |
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"""Returns textual description of required RAPI permissions.
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@type handler: L{rapi.baserlib.ResourceBase}
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@param handler: Handler class
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@type method: string
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@param method: HTTP method (e.g. L{http.HTTP_GET})
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@rtype: string
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"""
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access = rapi.baserlib.GetHandlerAccess(handler, method) |
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if access:
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return utils.CommaJoin(sorted(access)) |
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else:
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return "*(none)*" |
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class _RapiHandlersForDocsHelper(object): |
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@classmethod
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def Build(cls): |
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"""Returns dictionary of resource handlers.
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"""
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resources = \ |
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rapi.connector.GetHandlers("[node_name]", "[instance_name]", |
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"[group_name]", "[network_name]", "[job_id]", |
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"[disk_index]", "[resource]", |
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translate=cls._TranslateResourceUri) |
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return resources
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|
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@classmethod
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def _TranslateResourceUri(cls, *args): |
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"""Translates a resource URI for use in documentation.
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@see: L{rapi.connector.GetHandlers}
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"""
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return "".join(map(cls._UriPatternToString, args)) |
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@staticmethod
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def _UriPatternToString(value): |
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"""Converts L{rapi.connector.UriPattern} to strings.
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|
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"""
|
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if isinstance(value, rapi.connector.UriPattern): |
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return value.content
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else:
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return value
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_RAPI_RESOURCES_FOR_DOCS = _RapiHandlersForDocsHelper.Build() |
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|
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def _BuildRapiAccessTable(res): |
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"""Build a table with access permissions needed for all RAPI resources.
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|
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"""
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for (uri, handler) in utils.NiceSort(res.items(), key=compat.fst): |
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reslink = _MakeRapiResourceLink(None, uri)
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if not reslink: |
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# No link was generated
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continue
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|
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yield ":ref:`%s <%s>`" % (uri, reslink) |
543 |
|
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for method in _GetHandlerMethods(handler): |
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yield (" | :ref:`%s <%s>`: %s" % |
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(method, _MakeRapiResourceLink(method, uri), |
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_DescribeHandlerAccess(handler, method))) |
548 |
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|
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class RapiAccessTable(s_compat.Directive): |
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"""Custom directive to generate table of all RAPI resources.
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|
553 |
See also <http://docutils.sourceforge.net/docs/howto/rst-directives.html>.
|
554 |
|
555 |
"""
|
556 |
has_content = False
|
557 |
required_arguments = 0
|
558 |
optional_arguments = 0
|
559 |
final_argument_whitespace = False
|
560 |
option_spec = {} |
561 |
|
562 |
def run(self): |
563 |
include_text = "\n".join(_BuildRapiAccessTable(_RAPI_RESOURCES_FOR_DOCS))
|
564 |
|
565 |
# Inject into state machine
|
566 |
include_lines = docutils.statemachine.string2lines(include_text, _TAB_WIDTH, |
567 |
convert_whitespace=1)
|
568 |
self.state_machine.insert_input(include_lines, self.__class__.__name__) |
569 |
|
570 |
return []
|
571 |
|
572 |
|
573 |
class RapiResourceDetails(s_compat.Directive): |
574 |
"""Custom directive for RAPI resource details.
|
575 |
|
576 |
See also <http://docutils.sourceforge.net/docs/howto/rst-directives.html>.
|
577 |
|
578 |
"""
|
579 |
has_content = False
|
580 |
required_arguments = 1
|
581 |
optional_arguments = 0
|
582 |
final_argument_whitespace = False
|
583 |
|
584 |
def run(self): |
585 |
uri = self.arguments[0] |
586 |
|
587 |
try:
|
588 |
handler = _RAPI_RESOURCES_FOR_DOCS[uri] |
589 |
except KeyError: |
590 |
raise self.error("Unknown resource URI '%s'" % uri) |
591 |
|
592 |
lines = [ |
593 |
".. list-table::",
|
594 |
" :widths: 1 4",
|
595 |
" :header-rows: 1",
|
596 |
"",
|
597 |
" * - Method",
|
598 |
" - :ref:`Required permissions <rapi-users>`",
|
599 |
] |
600 |
|
601 |
for method in _GetHandlerMethods(handler): |
602 |
lines.extend([ |
603 |
" * - :ref:`%s <%s>`" % (method, _MakeRapiResourceLink(method, uri)),
|
604 |
" - %s" % _DescribeHandlerAccess(handler, method),
|
605 |
]) |
606 |
|
607 |
# Inject into state machine
|
608 |
include_lines = \ |
609 |
docutils.statemachine.string2lines("\n".join(lines), _TAB_WIDTH,
|
610 |
convert_whitespace=1)
|
611 |
self.state_machine.insert_input(include_lines, self.__class__.__name__) |
612 |
|
613 |
return []
|
614 |
|
615 |
|
616 |
def setup(app): |
617 |
"""Sphinx extension callback.
|
618 |
|
619 |
"""
|
620 |
# TODO: Implement Sphinx directive for query fields
|
621 |
app.add_directive("opcode_params", OpcodeParams)
|
622 |
app.add_directive("opcode_result", OpcodeResult)
|
623 |
app.add_directive("pyassert", PythonAssert)
|
624 |
app.add_role("pyeval", PythonEvalRole)
|
625 |
app.add_directive("rapi_access_table", RapiAccessTable)
|
626 |
app.add_directive("rapi_resource_details", RapiResourceDetails)
|
627 |
|
628 |
app.add_config_value("enable_manpages", False, True) |
629 |
app.add_role("manpage", _ManPageRole)
|