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 from sphinx.ext.autodoc import AutodocReporter
  41
  42 __version__  = '1.0'
  43
  44 class KernelDocDirective(Directive):
  45     """Extract kernel-doc comments from the specified file"""
  46     required_argument = 1
  47     optional_arguments = 4
  48     option_spec = {
  49         'doc': directives.unchanged_required,
  50         'functions': directives.unchanged,
  51         'export': directives.unchanged,
  52         'internal': directives.unchanged,
  53     }
  54     has_content = False
  55
  56     def run(self):
  57         env = self.state.document.settings.env
  58         cmd = [env.config.kerneldoc_bin, '-rst', '-enable-lineno']
  59
  60         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
  61         export_file_patterns = []
  62
  63         # Tell sphinx of the dependency
  64         env.note_dependency(os.path.abspath(filename))
  65
  66         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
  67
  68         # FIXME: make this nicer and more robust against errors
  69         if 'export' in self.options:
  70             cmd += ['-export']
  71             export_file_patterns = str(self.options.get('export')).split()
  72         elif 'internal' in self.options:
  73             cmd += ['-internal']
  74             export_file_patterns = str(self.options.get('internal')).split()
  75         elif 'doc' in self.options:
  76             cmd += ['-function', str(self.options.get('doc'))]
  77         elif 'functions' in self.options:
  78             functions = self.options.get('functions').split()
  79             if functions:
  80                 for f in functions:
  81                     cmd += ['-function', f]
  82             else:
  83                 cmd += ['-no-doc-sections']
  84
  85         for pattern in export_file_patterns:
  86             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
  87                 env.note_dependency(os.path.abspath(f))
  88                 cmd += ['-export-file', f]
  89
  90         cmd += [filename]
  91
  92         try:
  93             env.app.verbose('calling kernel-doc \'%s\'' % (" ".join(cmd)))
  94
  95             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  96             out, err = p.communicate()
  97
  98             out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
  99
 100             if p.returncode != 0:
 101                 sys.stderr.write(err)
 102
 103                 env.app.warn('kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
 104                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 105             elif env.config.kerneldoc_verbosity > 0:
 106                 sys.stderr.write(err)
 107
 108             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
 109             result = ViewList()
 110
 111             lineoffset = 0;
 112             line_regex = re.compile("^#define LINENO ([0-9]+)$")
 113             for line in lines:
 114                 match = line_regex.search(line)
 115                 if match:
 116                     # sphinx counts lines from 0
 117                     lineoffset = int(match.group(1)) - 1
 118                     # we must eat our comments since the upset the markup
 119                 else:
 120                     result.append(line, filename, lineoffset)
 121                     lineoffset += 1
 122
 123             node = nodes.section()
 124             buf = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
 125             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
 126             self.state.memo.title_styles, self.state.memo.section_level = [], 0
 127             try:
 128                 self.state.nested_parse(result, 0, node, match_titles=1)
 129             finally:
 130                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = buf
 131
 132             return node.children
 133
 134         except Exception as e:  # pylint: disable=W0703
 135             env.app.warn('kernel-doc \'%s\' processing failed with: %s' %
 136                          (" ".join(cmd), str(e)))
 137             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 138
 139 def setup(app):
 140     app.add_config_value('kerneldoc_bin', None, 'env')
 141     app.add_config_value('kerneldoc_srctree', None, 'env')
 142     app.add_config_value('kerneldoc_verbosity', 1, 'env')
 143
 144     app.add_directive('kernel-doc', KernelDocDirective)
 145
 146     return dict(
 147         version = __version__,
 148         parallel_read_safe = True,
 149         parallel_write_safe = True
 150     )