1 .. _documentation-guide:
7 This guide provides details on how to contribute to the OpenDaylight
8 documentation. OpenDaylight currently uses a mix of AsciiDoc_ and
9 reStructuredText_ for documentation, although the `Documentation
10 Group`_ is generally trying to move toward using reStructuredText_ and
11 Sphinx_ to build it as it is widely-used to provide both HTML and pdf
12 documentation that can be easily versioned alongside the code. It also
13 offers similar syntax to Markdown which is familiar to large numbers of
16 .. contents:: Contents
23 This section serves two purposes:
25 #. A guide for those writing documentation to follow.
26 #. A guide for those reviewing documentation.
28 That being said, assuming that the content is usable, the bias should
29 be toward merging it rather than blocking on relatively minor edits.
31 Formatting Preferences
32 ----------------------
34 In general, the documentation team has focused on trying to make sure
35 that the instructions are comprehensible, but not being overly pedantic
36 about these things. Along those lines, while we would prefer the
37 following, generally they aren't a reason to -1 in and of themselves:
39 * No trailing whitespace
40 * Line wrapping at something reasonable, i.e., 72–100 characters
45 * Functionality: something useful a project provides abstractly
46 * Feature: a Karaf feature that somebody could install
47 * Project: a project within OpenDaylight, projects ship features to
49 * OpenDaylight: this refers to the software we release, use this in
50 place of OpenDaylight controller, the OpenDaylight controller, not
53 * Since there is a controller project within OpenDaylight, using
56 Common writing style mistakes
57 -----------------------------
59 * In per-project user documentation, you should never say *git clone*,
60 but should assume people have downloaded and installed the controller
61 per the getting started guide and start with ``feautre:install
63 * Avoid statements which are true about part of OpenDaylight, but not
66 * For example: "OpenDaylight is a NETCONF controller." It is, but
67 that is not all it is.
69 * In general, developer documentation should target external developers
70 to your project so should talk about what APIs you have and how they
71 could use them. It *should not* document how to contribute to your
77 * Avoid contractions: use cannot instead of can't, it is instead of
80 Things to get right with spacing and capitalization
81 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
83 *Note that all of these apply when using them in text. If they are used
84 as part of URL, class name, or something similar, use the actual
85 capitalization and spacing.*
90 * datastore: not data store, Data Store, or DataStore (unless it's a
92 * IPsec, not IPSEC or ipsec
93 * IPv4 or IPv6: not Ipv4, Ipv6, ipv4, ipv6, IPV4, or IPV6
95 * Linux: not LINUX or linux
96 * NETCONF: not Netconf or netconf
97 * Neutron: not neutron
98 * OSGi: not osgi or OSGI
99 * Open vSwitch: not OpenvSwitch, OpenVSwitch, or Open V Switch, etc.
100 * OpenDaylight: not Opendaylight, Open Daylight, or OpenDayLight, etc.
102 * also avoid abbreviations like ODL and ODC
104 * OpenFlow: not Openflow, Open Flow, openflow, etc.
105 * OpenStack: not Open Stack or Openstack
106 * QoS: not Qos, QOS, or qos
107 * RESTCONF: not Restconf or restconf
111 * YANG: not Yang or yang
113 reStructuredText-based Documentation
114 ====================================
116 When using reStructuredText, we try to follow the python documentation
117 style guide. See: https://docs.python.org/devguide/documenting.html
119 The best reference for reStrucutedText syntax seems to be the Sphinx
120 Primer on reStructuredText_.
122 To build and review the reStructuredText documentation locally you must
123 have installed locally:
128 Which both should be available in most distribution's package managers.
130 Then simply run tox and open the html produced via your favorite web
135 git clone https://git.opendaylight.org/gerrit/docs
137 git submodule update --init
139 firefox docs/_build/html/index.html
141 .. note:: Make sure to run `tox -edocs` and not just `tox`. See `Make
142 sure you run tox -edocs`_
147 The directory structure for the reStructuredText documentation is
148 rooted in the ``docs`` directory inside the ``docs`` ``git``
151 Below that there are guides hosted directly in the ``docs`` ``git``
152 repository and there are guides hosted in remote ``git`` repositories.
153 Usually those are for project-specific information.
155 For example here is the directory layout on June, 28th 2016::
161 ├── documentation.rst
162 ├── getting-started-guide
164 │ ├── concepts_and_tools.rst
165 │ ├── experimental_features.rst
167 │ ├── installing_opendaylight.rst
168 │ ├── introduction.rst
169 │ ├── karaf_features.rst
170 │ ├── other_features.rst
172 │ └── who_should_use.rst
175 ├── opendaylight-with-openstack
178 │ ├── openstack-with-gbp.rst
179 │ ├── openstack-with-ovsdb.rst
180 │ └── openstack-with-vtn.rst
185 The ``getting-started-guide`` and ``opendaylight-with-openstack``
186 directories correspond to two guides hosted in the ``docs`` repository,
187 while the ``submodules/releng/builder`` directory houses documentation
188 for the `RelEng/Builder`_ project.
190 Inside each guide there is usually an ``index.rst`` file which then
191 includes other files using a ``toctree`` directive. For example::
196 getting-started-guide/index
197 opendaylight-with-openstack/index
198 submodules/releng/builder/docs/index
200 This creates a table of contents on that page where each heading of the
201 table of contents is the root of the files that are included.
203 .. note:: When including rst files using ``toctree`` omit the .rst at
204 the end of the file name.
206 Documentation Layout and Style
207 ------------------------------
209 As mentioned previously we try to follow the python documentation style
210 guide which defines a few types of sections::
212 # with overline, for parts
213 * with overline, for chapters
216 ^, for subsubsections
219 We try to follow the following structure based on that recommendation::
221 docs/index.rst -> entry point
222 docs/____-guide/index.rst -> part
223 docs/____-guide/<chapter>.rst -> chapter
225 In the ____-guide/index.rst we use the # with overline at the very top
226 of the file to determine that it is a part and then within each chapter
227 file we start the document with a section using * with overline to
228 denote that it's the chapter heading and then everything in the rest of
229 the chapter should use::
233 ^, for subsubsections
239 Nested formatting doesn't work
240 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
242 As stated in the reStructuredText_ guide, inline markup for bold,
243 italic, and fixed-width can't be nested. Further, it can't be mixed
244 with hyperlinks, so you can't have bold text link somewhere.
246 This is tracked in a `Docutils FAQ question
247 <http://docutils.sourceforge.net/FAQ.html#is-nested-inline-markup-possible>`,
248 but there is no clear current plan to fix this.
250 Make sure you've cloned submodules
251 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
253 If you see an error like this::
255 ./build-integration-robot-libdoc.sh: line 6: cd: submodules/integration/test/csit/libraries: No such file or directory
256 Resource file '*.robot' does not exist.
258 It means that you haven't pulled down the git submodule for the
259 integration/test project. The fastest way to do that is::
261 git submodule update --init
263 In some cases, you might wind up with submodules which are somehow
264 out-of-sync and in that case, the easiest way to fix it is delete the
265 submodules directory and then re-clone the submodules::
267 rm -rf docs/submodules/
268 git submodule update --init
270 .. warning:: This will delete any local changes or information you made
271 in the submodules. This should only be the case if you
272 manually edited files in that directory.
274 Make sure you run tox -edocs
275 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
277 If you see an error like::
279 ERROR: docs: could not install deps [-rrequirements.txt]; v = InvocationError('/Users/ckd/git-reps/docs/.tox/docs/bin/pip install -rrequirements.txt (see /Users/ckd/git-reps/docs/.tox/docs/log/docs-1.log)', 1)
280 ERROR: docs-linkcheck: could not install deps [-rrequirements.txt]; v = InvocationError('/Users/ckd/git-reps/docs/.tox/docs-linkcheck/bin/pip install -rrequirements.txt (see /Users/ckd/git-reps/docs/.tox/docs-linkcheck/log/docs-linkcheck-1.log)', 1)
282 It usually means you ran `tox` and not `tox -edocs`, which will result
283 in running jobs inside submodules which aren't supported by the
284 environment defined by the `requirements.txt` file in the documentation
285 tox setup. Just run tox -edocs and it should be fine.
287 Clear your tox directory and try again
288 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
290 Sometimes, tox will not detect when your ``requirements.txt`` file has
291 changed and so will try to run things without the correct dependencies.
292 This usually manifests as ``No module named X`` errors or
293 an ``ExtensionError`` and can be fixed by deleting the ``.tox``
294 directory and building again::
299 Builds on Read the Docs
300 ^^^^^^^^^^^^^^^^^^^^^^^
302 It appears as though the Read the Docs builds don't automatically clear
303 the file structure between builds and clones. The result is that you
304 may have to clean up the state of old runs of the build script.
306 As an example, this patch:
307 https://git.opendaylight.org/gerrit/41679
309 Finally fixed the fact that our builds for failing because they were
310 taking too long by removing directories of generated javadoc that were
311 present from previous runs.
313 AsciiDoc-based Documentation
314 ============================
316 Information on the AsciiDoc tools and build system can be found here:
317 https://wiki.opendaylight.org/view/Documentation/Tools
322 The AsciiDoc documentation is all located in the ``manuals`` directory
323 of the ``docs`` ``git`` repository. An example of the directory
324 structure on June 28th, 2016 can be seen here::
329 │ └── app_support.xml
336 ├── getting-started-guide
361 Each of the top-level directories under ``manuals`` is a whole guide by
362 itself and it contains a ``pom.xml`` file saying how to build it, a
363 ``src/main/asciidoc`` directory with AsciiDoc source files and a
364 ``src/main/resources`` directory containing images.
369 See `AsciiDoc Tips`_ on the wiki for more information.
371 Common AsciiDoc mistakes
372 ^^^^^^^^^^^^^^^^^^^^^^^^
374 See also `AsciiDoc Tips`_.
376 * Lists that get formatted incorrectly because of no blank line above
378 * Numbered lists that are formatted incorrectly and every bullet winds
381 Migration from AsciiDoc to ReStructuredText
382 ===========================================
387 In theory, Pandoc_ can convert from DocBook to reStructuredText and we
388 produce DocBook as part of our build chain from AsciiDoctor. In
389 practice, for modest-sized migrations doing things by hand works fairly
395 Converting from AsciiDoc to reStructuredText is usually pretty
396 straightforward and involves looking up the basic syntax for what you
397 want to do by looking it up in the reStructuredText_ guide.
399 The differences are usually minor and fast to change.
401 Also, because of how fast Sphinx builds, and how fast it is to refresh
402 the HTML documentation rapid iteration is very easy.
404 Bold/Italics/Verbatim Formatting
405 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
407 This is mostly minor syntax issues. In AsciiDoc you do inline
408 formatting something like this::
410 *bold* _italic_ +verbatim+ `verbatim`
412 In reStructuredText, things are slightly different::
414 **bold** *italic* ``verbatim``
419 Image formats change from something like::
421 .OpenStack Architecture
422 image::vtn/OpenStackDeveloperGuide.png["OpenStack Architecture",width=500]
426 .. figure:: images/dlux-default.png
428 A helpful regular expression for automating the replacements is
431 search: ^( *)\.(.+)\n +image::(.+)\[(.+),width=(\d+)\]
432 replace: $1.. figure:: images/dlux/$3\n$1 :width: $5\n\n$1 $2
438 .. _AsciiDoc: http://www.methods.co.nz/asciidoc/
439 .. _Sphinx: http://www.sphinx-doc.org/en/stable/
440 .. _reStructuredText: http://www.sphinx-doc.org/en/stable/rest.html
441 .. _Documentation Group: https://wiki.opendaylight.org/view/Documentation/
442 .. _RelEng/Builder: https://wiki.opendaylight.org/view/RelEng/Builder
443 .. _Pandoc: http://pandoc.org/
444 .. _AsciiDoc Tips: https://wiki.opendaylight.org/view/Documentation/Tools/AsciiDoc_Tips