docs/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         'functions': directives.unchanged,
  63         'export': directives.unchanged,
  64         'internal': directives.unchanged,
  65     }
  66     has_content = False
  67
  68     def run(self):
  69         env = self.state.document.settings.env
  70         cmd = env.config.kerneldoc_bin + ['-rst', '-enable-lineno']
  71
  72         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
  73         export_file_patterns = []
  74
  75         # Tell sphinx of the dependency
  76         env.note_dependency(os.path.abspath(filename))
  77
  78         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
  79
  80         # FIXME: make this nicer and more robust against errors
  81         if 'export' in self.options:
  82             cmd += ['-export']
  83             export_file_patterns = str(self.options.get('export')).split()
  84         elif 'internal' in self.options:
  85             cmd += ['-internal']
  86             export_file_patterns = str(self.options.get('internal')).split()
  87         elif 'doc' in self.options:
  88             cmd += ['-function', str(self.options.get('doc'))]
  89         elif 'functions' in self.options:
  90             functions = self.options.get('functions').split()
  91             if functions:
  92                 for f in functions:
  93                     cmd += ['-function', f]
  94             else:
  95                 cmd += ['-no-doc-sections']
  96
  97         for pattern in export_file_patterns:
  98             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
  99                 env.note_dependency(os.path.abspath(f))
 100                 cmd += ['-export-file', f]
 101
 102         cmd += ['-sphinx-version', sphinx.__version__]
 103         cmd += [filename]
 104
 105         try:
 106             kernellog.verbose(env.app,
 107                               'calling kernel-doc \'%s\'' % (" ".join(cmd)))
 108
 109             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 110             out, err = p.communicate()
 111
 112             out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
 113
 114             if p.returncode != 0:
 115                 sys.stderr.write(err)
 116
 117                 kernellog.warn(env.app,
 118                                'kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
 119                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 120             elif env.config.kerneldoc_verbosity > 0:
 121                 sys.stderr.write(err)
 122
 123             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
 124             result = ViewList()
 125
 126             lineoffset = 0;
 127             line_regex = re.compile("^#define LINENO ([0-9]+)$")
 128             for line in lines:
 129                 match = line_regex.search(line)
 130                 if match:
 131                     # sphinx counts lines from 0
 132                     lineoffset = int(match.group(1)) - 1
 133                     # we must eat our comments since the upset the markup
 134                 else:
 135                     result.append(line, filename, lineoffset)
 136                     lineoffset += 1
 137
 138             node = nodes.section()
 139             self.do_parse(result, node)
 140
 141             return node.children
 142
 143         except Exception as e:  # pylint: disable=W0703
 144             kernellog.warn(env.app, 'kernel-doc \'%s\' processing failed with: %s' %
 145                            (" ".join(cmd), str(e)))
 146             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 147
 148     def do_parse(self, result, node):
 149         if Use_SSI:
 150             with switch_source_input(self.state, result):
 151                 self.state.nested_parse(result, 0, node, match_titles=1)
 152         else:
 153             save = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
 154             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
 155             self.state.memo.title_styles, self.state.memo.section_level = [], 0
 156             try:
 157                 self.state.nested_parse(result, 0, node, match_titles=1)
 158             finally:
 159                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = save
 160
 161
 162 def setup(app):
 163     app.add_config_value('kerneldoc_bin', None, 'env')
 164     app.add_config_value('kerneldoc_srctree', None, 'env')
 165     app.add_config_value('kerneldoc_verbosity', 1, 'env')
 166
 167     app.add_directive('kernel-doc', KernelDocDirective)
 168
 169     return dict(
 170         version = __version__,
 171         parallel_read_safe = True,
 172         parallel_write_safe = True
 173     )