Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/humanfriendly/sphinx.py @ 2:6af9afd405e9 draft

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"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
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1 # Human friendly input/output in Python.
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2 #
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3 # Author: Peter Odding <peter@peterodding.com>
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4 # Last Change: March 1, 2020
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5 # URL: https://humanfriendly.readthedocs.io
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6
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7 """
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8 Customizations for and integration with the Sphinx_ documentation generator.
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9
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10 The :mod:`humanfriendly.sphinx` module uses the `Sphinx extension API`_ to
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11 customize the process of generating Sphinx based Python documentation. To
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12 explore the functionality this module offers its best to start reading
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13 from the :func:`setup()` function.
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14
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15 .. _Sphinx: http://www.sphinx-doc.org/
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16 .. _Sphinx extension API: http://sphinx-doc.org/extdev/appapi.html
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17 """
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18
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19 # Standard library modules.
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20 import logging
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21 import types
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22
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23 # External dependencies (if Sphinx is installed docutils will be installed).
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24 import docutils.nodes
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25 import docutils.utils
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26
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27 # Modules included in our package.
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28 from humanfriendly.deprecation import get_aliases
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29 from humanfriendly.text import compact, dedent, format
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30 from humanfriendly.usage import USAGE_MARKER, render_usage
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31
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32 # Public identifiers that require documentation.
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33 __all__ = (
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34 "deprecation_note_callback",
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35 "enable_deprecation_notes",
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36 "enable_man_role",
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37 "enable_pypi_role",
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38 "enable_special_methods",
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39 "enable_usage_formatting",
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40 "logger",
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41 "man_role",
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42 "pypi_role",
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43 "setup",
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44 "special_methods_callback",
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45 "usage_message_callback",
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46 )
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47
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48 # Initialize a logger for this module.
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49 logger = logging.getLogger(__name__)
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50
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51
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52 def deprecation_note_callback(app, what, name, obj, options, lines):
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53 """
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54 Automatically document aliases defined using :func:`~humanfriendly.deprecation.define_aliases()`.
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55
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56 Refer to :func:`enable_deprecation_notes()` to enable the use of this
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57 function (you probably don't want to call :func:`deprecation_note_callback()`
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58 directly).
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59
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60 This function implements a callback for ``autodoc-process-docstring`` that
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61 reformats module docstrings to append an overview of aliases defined by the
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62 module.
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63
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64 The parameters expected by this function are those defined for Sphinx event
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65 callback functions (i.e. I'm not going to document them here :-).
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66 """
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67 if isinstance(obj, types.ModuleType) and lines:
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68 aliases = get_aliases(obj.__name__)
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69 if aliases:
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70 # Convert the existing docstring to a string and remove leading
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71 # indentation from that string, otherwise our generated content
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72 # would have to match the existing indentation in order not to
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73 # break docstring parsing (because indentation is significant
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74 # in the reStructuredText format).
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75 blocks = [dedent("\n".join(lines))]
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76 # Use an admonition to group the deprecated aliases together and
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77 # to distinguish them from the autodoc entries that follow.
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78 blocks.append(".. note:: Deprecated names")
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79 indent = " " * 3
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80 if len(aliases) == 1:
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81 explanation = """
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82 The following alias exists to preserve backwards compatibility,
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83 however a :exc:`~exceptions.DeprecationWarning` is triggered
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84 when it is accessed, because this alias will be removed
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85 in a future release.
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86 """
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87 else:
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88 explanation = """
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89 The following aliases exist to preserve backwards compatibility,
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90 however a :exc:`~exceptions.DeprecationWarning` is triggered
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91 when they are accessed, because these aliases will be
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92 removed in a future release.
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93 """
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94 blocks.append(indent + compact(explanation))
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95 for name, target in aliases.items():
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96 blocks.append(format("%s.. data:: %s", indent, name))
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97 blocks.append(format("%sAlias for :obj:`%s`.", indent * 2, target))
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98 update_lines(lines, "\n\n".join(blocks))
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99
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100
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101 def enable_deprecation_notes(app):
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102 """
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103 Enable documenting backwards compatibility aliases using the autodoc_ extension.
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104
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105 :param app: The Sphinx application object.
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106
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107 This function connects the :func:`deprecation_note_callback()` function to
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108 ``autodoc-process-docstring`` events.
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109
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110 .. _autodoc: http://www.sphinx-doc.org/en/stable/ext/autodoc.html
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111 """
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112 app.connect("autodoc-process-docstring", deprecation_note_callback)
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113
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114
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115 def enable_man_role(app):
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116 """
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117 Enable the ``:man:`` role for linking to Debian Linux manual pages.
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118
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119 :param app: The Sphinx application object.
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120
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121 This function registers the :func:`man_role()` function to handle the
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122 ``:man:`` role.
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123 """
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124 app.add_role("man", man_role)
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125
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126
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127 def enable_pypi_role(app):
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128 """
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129 Enable the ``:pypi:`` role for linking to the Python Package Index.
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130
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131 :param app: The Sphinx application object.
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132
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133 This function registers the :func:`pypi_role()` function to handle the
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134 ``:pypi:`` role.
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135 """
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136 app.add_role("pypi", pypi_role)
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137
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138
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139 def enable_special_methods(app):
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140 """
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141 Enable documenting "special methods" using the autodoc_ extension.
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142
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143 :param app: The Sphinx application object.
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144
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145 This function connects the :func:`special_methods_callback()` function to
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146 ``autodoc-skip-member`` events.
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147
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148 .. _autodoc: http://www.sphinx-doc.org/en/stable/ext/autodoc.html
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149 """
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150 app.connect("autodoc-skip-member", special_methods_callback)
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151
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152
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153 def enable_usage_formatting(app):
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154 """
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155 Reformat human friendly usage messages to reStructuredText_.
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156
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157 :param app: The Sphinx application object (as given to ``setup()``).
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158
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159 This function connects the :func:`usage_message_callback()` function to
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160 ``autodoc-process-docstring`` events.
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161
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162 .. _reStructuredText: https://en.wikipedia.org/wiki/ReStructuredText
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163 """
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164 app.connect("autodoc-process-docstring", usage_message_callback)
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165
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166
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167 def man_role(role, rawtext, text, lineno, inliner, options={}, content=[]):
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168 """
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169 Convert a Linux manual topic to a hyperlink.
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170
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171 Using the ``:man:`` role is very simple, here's an example:
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172
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173 .. code-block:: rst
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174
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175 See the :man:`python` documentation.
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176
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177 This results in the following:
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178
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179 See the :man:`python` documentation.
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180
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181 As the example shows you can use the role inline, embedded in sentences of
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182 text. In the generated documentation the ``:man:`` text is omitted and a
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183 hyperlink pointing to the Debian Linux manual pages is emitted.
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184 """
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185 man_url = "https://manpages.debian.org/%s" % text
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186 reference = docutils.nodes.reference(rawtext, docutils.utils.unescape(text), refuri=man_url, **options)
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187 return [reference], []
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188
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189
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190 def pypi_role(role, rawtext, text, lineno, inliner, options={}, content=[]):
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191 """
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192 Generate hyperlinks to the Python Package Index.
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193
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194 Using the ``:pypi:`` role is very simple, here's an example:
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195
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196 .. code-block:: rst
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197
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198 See the :pypi:`humanfriendly` package.
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199
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200 This results in the following:
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201
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202 See the :pypi:`humanfriendly` package.
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203
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204 As the example shows you can use the role inline, embedded in sentences of
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205 text. In the generated documentation the ``:pypi:`` text is omitted and a
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206 hyperlink pointing to the Python Package Index is emitted.
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207 """
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208 pypi_url = "https://pypi.org/project/%s/" % text
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209 reference = docutils.nodes.reference(rawtext, docutils.utils.unescape(text), refuri=pypi_url, **options)
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210 return [reference], []
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211
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212
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213 def setup(app):
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214 """
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215 Enable all of the provided Sphinx_ customizations.
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216
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217 :param app: The Sphinx application object.
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218
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219 The :func:`setup()` function makes it easy to enable all of the Sphinx
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220 customizations provided by the :mod:`humanfriendly.sphinx` module with the
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221 least amount of code. All you need to do is to add the module name to the
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222 ``extensions`` variable in your ``conf.py`` file:
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223
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224 .. code-block:: python
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225
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226 # Sphinx extension module names.
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227 extensions = [
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228 'sphinx.ext.autodoc',
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229 'sphinx.ext.doctest',
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230 'sphinx.ext.intersphinx',
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231 'humanfriendly.sphinx',
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232 ]
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233
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234 When Sphinx sees the :mod:`humanfriendly.sphinx` name it will import the
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235 module and call its :func:`setup()` function. This function will then call
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236 the following:
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237
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238 - :func:`enable_deprecation_notes()`
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239 - :func:`enable_man_role()`
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240 - :func:`enable_pypi_role()`
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241 - :func:`enable_special_methods()`
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242 - :func:`enable_usage_formatting()`
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243
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244 Of course more functionality may be added at a later stage. If you don't
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245 like that idea you may be better of calling the individual functions from
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246 your own ``setup()`` function.
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247 """
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248 enable_deprecation_notes(app)
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249 enable_man_role(app)
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250 enable_pypi_role(app)
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251 enable_special_methods(app)
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252 enable_usage_formatting(app)
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253
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254
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255 def special_methods_callback(app, what, name, obj, skip, options):
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256 """
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257 Enable documenting "special methods" using the autodoc_ extension.
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258
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259 Refer to :func:`enable_special_methods()` to enable the use of this
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260 function (you probably don't want to call
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261 :func:`special_methods_callback()` directly).
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262
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263 This function implements a callback for ``autodoc-skip-member`` events to
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264 include documented "special methods" (method names with two leading and two
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265 trailing underscores) in your documentation. The result is similar to the
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266 use of the ``special-members`` flag with one big difference: Special
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267 methods are included but other types of members are ignored. This means
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268 that attributes like ``__weakref__`` will always be ignored (this was my
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269 main annoyance with the ``special-members`` flag).
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270
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271 The parameters expected by this function are those defined for Sphinx event
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272 callback functions (i.e. I'm not going to document them here :-).
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273 """
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274 if getattr(obj, "__doc__", None) and isinstance(obj, (types.FunctionType, types.MethodType)):
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275 return False
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276 else:
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277 return skip
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278
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279
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280 def update_lines(lines, text):
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281 """Private helper for ``autodoc-process-docstring`` callbacks."""
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282 while lines:
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283 lines.pop()
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284 lines.extend(text.splitlines())
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285
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286
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287 def usage_message_callback(app, what, name, obj, options, lines):
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288 """
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289 Reformat human friendly usage messages to reStructuredText_.
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290
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291 Refer to :func:`enable_usage_formatting()` to enable the use of this
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292 function (you probably don't want to call :func:`usage_message_callback()`
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293 directly).
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294
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295 This function implements a callback for ``autodoc-process-docstring`` that
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296 reformats module docstrings using :func:`.render_usage()` so that Sphinx
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297 doesn't mangle usage messages that were written to be human readable
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298 instead of machine readable. Only module docstrings whose first line starts
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299 with :data:`.USAGE_MARKER` are reformatted.
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300
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301 The parameters expected by this function are those defined for Sphinx event
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302 callback functions (i.e. I'm not going to document them here :-).
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303 """
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304 # Make sure we only modify the docstrings of modules.
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305 if isinstance(obj, types.ModuleType) and lines:
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306 # Make sure we only modify docstrings containing a usage message.
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307 if lines[0].startswith(USAGE_MARKER):
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308 # Convert the usage message to reStructuredText.
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309 text = render_usage("\n".join(lines))
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310 # Fill up the buffer with our modified docstring.
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311 update_lines(lines, text)