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 os
  31 import subprocess
  32 import sys
  33 import re
  34 import glob
  35
  36 from docutils import nodes, statemachine
  37 from docutils.statemachine import ViewList
  38 from docutils.parsers.rst import directives
  39 from sphinx.util.compat import 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_required,
  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             for f in str(self.options.get('functions')).split():
  79                 cmd += ['-function', f]
  80
  81         for pattern in export_file_patterns:
  82             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
  83                 env.note_dependency(os.path.abspath(f))
  84                 cmd += ['-export-file', f]
  85
  86         cmd += [filename]
  87
  88         try:
  89             env.app.verbose('calling kernel-doc \'%s\'' % (" ".join(cmd)))
  90
  91             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
  92             out, err = p.communicate()
  93
  94             # python2 needs conversion to unicode.
  95             # python3 with universal_newlines=True returns strings.
  96             if sys.version_info.major < 3:
  97                 out, err = unicode(out, 'utf-8'), unicode(err, 'utf-8')
  98
  99             if p.returncode != 0:
 100                 sys.stderr.write(err)
 101
 102                 env.app.warn('kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
 103                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 104             elif env.config.kerneldoc_verbosity > 0:
 105                 sys.stderr.write(err)
 106
 107             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
 108             result = ViewList()
 109
 110             lineoffset = 0;
 111             line_regex = re.compile("^#define LINENO ([0-9]+)$")
 112             for line in lines:
 113                 match = line_regex.search(line)
 114                 if match:
 115                     # sphinx counts lines from 0
 116                     lineoffset = int(match.group(1)) - 1
 117                     # we must eat our comments since the upset the markup
 118                 else:
 119                     result.append(line, filename, lineoffset)
 120                     lineoffset += 1
 121
 122             node = nodes.section()
 123             buf = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
 124             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
 125             self.state.memo.title_styles, self.state.memo.section_level = [], 0
 126             try:
 127                 self.state.nested_parse(result, 0, node, match_titles=1)
 128             finally:
 129                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = buf
 130
 131             return node.children
 132
 133         except Exception as e:  # pylint: disable=W0703
 134             env.app.warn('kernel-doc \'%s\' processing failed with: %s' %
 135                          (" ".join(cmd), str(e)))
 136             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 137
 138 def setup(app):
 139     app.add_config_value('kerneldoc_bin', None, 'env')
 140     app.add_config_value('kerneldoc_srctree', None, 'env')
 141     app.add_config_value('kerneldoc_verbosity', 1, 'env')
 142
 143     app.add_directive('kernel-doc', KernelDocDirective)
 144
 145     return dict(
 146         version = __version__,
 147         parallel_read_safe = True,
 148         parallel_write_safe = True
 149     )