Documentation/sphinx/kerneldoc.py

   1 # coding=utf-8
   2 #
   3 # Copyright © 2016 Intel Corporation
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a
   6 # copy of this software and associated documentation files (the "Software"),
   7 # to deal in the Software without restriction, including without limitation
   8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 # and/or sell copies of the Software, and to permit persons to whom the
  10 # Software is furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice (including the next
  13 # paragraph) shall be included in all copies or substantial portions of the
  14 # Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22 # IN THE SOFTWARE.
  23 #
  24 # Authors:
  25 #    Jani Nikula <jani.nikula@intel.com>
  26 #
  27 # Please make sure this works on both python2 and python3.
  28 #
  29
  30 import codecs
  31 import os
  32 import subprocess
  33 import sys
  34 import re
  35 import glob
  36
  37 from docutils import nodes, statemachine
  38 from docutils.statemachine import ViewList
  39 from docutils.parsers.rst import directives, Directive
  40
  41 #
  42 # AutodocReporter is only good up to Sphinx 1.7
  43 #
  44 import sphinx
  45
  46 Use_SSI = sphinx.__version__[:3] >= '1.7'
  47 if Use_SSI:
  48     from sphinx.util.docutils import switch_source_input
  49 else:
  50     from sphinx.ext.autodoc import AutodocReporter
  51
  52 import kernellog
  53
  54 __version__  = '1.0'
  55
  56 class KernelDocDirective(Directive):
  57     """Extract kernel-doc comments from the specified file"""
  58     required_argument = 1
  59     optional_arguments = 4
  60     option_spec = {
  61         'doc': directives.unchanged_required,
  62         'export': directives.unchanged,
  63         'internal': directives.unchanged,
  64         'identifiers': directives.unchanged,
  65         'no-identifiers': directives.unchanged,
  66         'functions': directives.unchanged,
  67     }
  68     has_content = False
  69
  70     def run(self):
  71         env = self.state.document.settings.env
  72         cmd = [env.config.kerneldoc_bin, '-rst', '-enable-lineno']
  73
  74         # Pass the version string to kernel-doc, as it needs to use a different
  75         # dialect, depending what the C domain supports for each specific
  76         # Sphinx versions
  77         cmd += ['-sphinx-version', sphinx.__version__]
  78
  79         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
  80         export_file_patterns = []
  81
  82         # Tell sphinx of the dependency
  83         env.note_dependency(os.path.abspath(filename))
  84
  85         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
  86
  87         # 'function' is an alias of 'identifiers'
  88         if 'functions' in self.options:
  89             self.options['identifiers'] = self.options.get('functions')
  90
  91         # FIXME: make this nicer and more robust against errors
  92         if 'export' in self.options:
  93             cmd += ['-export']
  94             export_file_patterns = str(self.options.get('export')).split()
  95         elif 'internal' in self.options:
  96             cmd += ['-internal']
  97             export_file_patterns = str(self.options.get('internal')).split()
  98         elif 'doc' in self.options:
  99             cmd += ['-function', str(self.options.get('doc'))]
 100         elif 'identifiers' in self.options:
 101             identifiers = self.options.get('identifiers').split()
 102             if identifiers:
 103                 for i in identifiers:
 104                     cmd += ['-function', i]
 105             else:
 106                 cmd += ['-no-doc-sections']
 107
 108         if 'no-identifiers' in self.options:
 109             no_identifiers = self.options.get('no-identifiers').split()
 110             if no_identifiers:
 111                 for i in no_identifiers:
 112                     cmd += ['-nosymbol', i]
 113
 114         for pattern in export_file_patterns:
 115             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
 116                 env.note_dependency(os.path.abspath(f))
 117                 cmd += ['-export-file', f]
 118
 119         cmd += [filename]
 120
 121         try:
 122             kernellog.verbose(env.app,
 123                               'calling kernel-doc \'%s\'' % (" ".join(cmd)))
 124
 125             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 126             out, err = p.communicate()
 127
 128             out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
 129
 130             if p.returncode != 0:
 131                 sys.stderr.write(err)
 132
 133                 kernellog.warn(env.app,
 134                                'kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
 135                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 136             elif env.config.kerneldoc_verbosity > 0:
 137                 sys.stderr.write(err)
 138
 139             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
 140             result = ViewList()
 141
 142             lineoffset = 0;
 143             line_regex = re.compile("^#define LINENO ([0-9]+)$")
 144             for line in lines:
 145                 match = line_regex.search(line)
 146                 if match:
 147                     # sphinx counts lines from 0
 148                     lineoffset = int(match.group(1)) - 1
 149                     # we must eat our comments since the upset the markup
 150                 else:
 151                     doc = env.srcdir + "/" + env.docname + ":" + str(self.lineno)
 152                     result.append(line, doc + ": " + filename, lineoffset)
 153                     lineoffset += 1
 154
 155             node = nodes.section()
 156             self.do_parse(result, node)
 157
 158             return node.children
 159
 160         except Exception as e:  # pylint: disable=W0703
 161             kernellog.warn(env.app, 'kernel-doc \'%s\' processing failed with: %s' %
 162                            (" ".join(cmd), str(e)))
 163             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 164
 165     def do_parse(self, result, node):
 166         if Use_SSI:
 167             with switch_source_input(self.state, result):
 168                 self.state.nested_parse(result, 0, node, match_titles=1)
 169         else:
 170             save = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
 171             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
 172             self.state.memo.title_styles, self.state.memo.section_level = [], 0
 173             try:
 174                 self.state.nested_parse(result, 0, node, match_titles=1)
 175             finally:
 176                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = save
 177
 178
 179 def setup(app):
 180     app.add_config_value('kerneldoc_bin', None, 'env')
 181     app.add_config_value('kerneldoc_srctree', None, 'env')
 182     app.add_config_value('kerneldoc_verbosity', 1, 'env')
 183
 184     app.add_directive('kernel-doc', KernelDocDirective)
 185
 186     return dict(
 187         version = __version__,
 188         parallel_read_safe = True,
 189         parallel_write_safe = True
 190     )