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 import sphinx
  41 from sphinx.util.docutils import switch_source_input
  42 import kernellog
  43
  44 __version__  = '1.0'
  45
  46 class KernelDocDirective(Directive):
  47     """Extract kernel-doc comments from the specified file"""
  48     required_argument = 1
  49     optional_arguments = 4
  50     option_spec = {
  51         'doc': directives.unchanged_required,
  52         'export': directives.unchanged,
  53         'internal': directives.unchanged,
  54         'identifiers': directives.unchanged,
  55         'no-identifiers': directives.unchanged,
  56         'functions': directives.unchanged,
  57     }
  58     has_content = False
  59
  60     def run(self):
  61         env = self.state.document.settings.env
  62         cmd = [env.config.kerneldoc_bin, '-rst', '-enable-lineno']
  63
  64         # Pass the version string to kernel-doc, as it needs to use a different
  65         # dialect, depending what the C domain supports for each specific
  66         # Sphinx versions
  67         cmd += ['-sphinx-version', sphinx.__version__]
  68
  69         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
  70         export_file_patterns = []
  71
  72         # Tell sphinx of the dependency
  73         env.note_dependency(os.path.abspath(filename))
  74
  75         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
  76
  77         # 'function' is an alias of 'identifiers'
  78         if 'functions' in self.options:
  79             self.options['identifiers'] = self.options.get('functions')
  80
  81         # FIXME: make this nicer and more robust against errors
  82         if 'export' in self.options:
  83             cmd += ['-export']
  84             export_file_patterns = str(self.options.get('export')).split()
  85         elif 'internal' in self.options:
  86             cmd += ['-internal']
  87             export_file_patterns = str(self.options.get('internal')).split()
  88         elif 'doc' in self.options:
  89             cmd += ['-function', str(self.options.get('doc'))]
  90         elif 'identifiers' in self.options:
  91             identifiers = self.options.get('identifiers').split()
  92             if identifiers:
  93                 for i in identifiers:
  94                     cmd += ['-function', i]
  95             else:
  96                 cmd += ['-no-doc-sections']
  97
  98         if 'no-identifiers' in self.options:
  99             no_identifiers = self.options.get('no-identifiers').split()
 100             if no_identifiers:
 101                 for i in no_identifiers:
 102                     cmd += ['-nosymbol', i]
 103
 104         for pattern in export_file_patterns:
 105             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
 106                 env.note_dependency(os.path.abspath(f))
 107                 cmd += ['-export-file', f]
 108
 109         cmd += [filename]
 110
 111         try:
 112             kernellog.verbose(env.app,
 113                               'calling kernel-doc \'%s\'' % (" ".join(cmd)))
 114
 115             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 116             out, err = p.communicate()
 117
 118             out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
 119
 120             if p.returncode != 0:
 121                 sys.stderr.write(err)
 122
 123                 kernellog.warn(env.app,
 124                                'kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
 125                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 126             elif env.config.kerneldoc_verbosity > 0:
 127                 sys.stderr.write(err)
 128
 129             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
 130             result = ViewList()
 131
 132             lineoffset = 0;
 133             line_regex = re.compile("^#define LINENO ([0-9]+)$")
 134             for line in lines:
 135                 match = line_regex.search(line)
 136                 if match:
 137                     # sphinx counts lines from 0
 138                     lineoffset = int(match.group(1)) - 1
 139                     # we must eat our comments since the upset the markup
 140                 else:
 141                     doc = env.srcdir + "/" + env.docname + ":" + str(self.lineno)
 142                     result.append(line, doc + ": " + filename, lineoffset)
 143                     lineoffset += 1
 144
 145             node = nodes.section()
 146             self.do_parse(result, node)
 147
 148             return node.children
 149
 150         except Exception as e:  # pylint: disable=W0703
 151             kernellog.warn(env.app, 'kernel-doc \'%s\' processing failed with: %s' %
 152                            (" ".join(cmd), str(e)))
 153             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 154
 155     def do_parse(self, result, node):
 156         with switch_source_input(self.state, result):
 157             self.state.nested_parse(result, 0, node, match_titles=1)
 158
 159 def setup(app):
 160     app.add_config_value('kerneldoc_bin', None, 'env')
 161     app.add_config_value('kerneldoc_srctree', None, 'env')
 162     app.add_config_value('kerneldoc_verbosity', 1, 'env')
 163
 164     app.add_directive('kernel-doc', KernelDocDirective)
 165
 166     return dict(
 167         version = __version__,
 168         parallel_read_safe = True,
 169         parallel_write_safe = True
 170     )