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docs: Documenting how to write documentation (#1721)
Since our documentation is fairly complex, we need to have a document which describes how various parts of it work. This PR adds such documentation.
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# Development | ||
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```{toctree} | ||
Documentation <documentation.md> | ||
``` |
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# Documentation Site | ||
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Flame's documentation is written in **Markdown**. It is then rendered into HTML with the help of | ||
the [Sphinx] engine and its [MyST] plugin. The rendered files are then manually (but with the help | ||
of a script) published to [flame-docs-site], where the site is served via [GitHub Pages]. | ||
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[Sphinx]: https://www.sphinx-doc.org/en/master/ | ||
[MyST]: https://myst-parser.readthedocs.io/en/latest/ | ||
[flame-docs-site]: https://github.com/flame-engine/flame-docs-site | ||
[GitHub Pages]: https://pages.github.com/ | ||
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## Markdown | ||
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The main documentation site is written in Markdown. We assume that you're already familiar with the | ||
basics of the Markdown syntax (if not, there are plenty of guides on the Internet). Instead, this | ||
section will focus on the Markdown extensions that are enabled in our build system. | ||
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### Table of contents | ||
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The table of contents for the site must be created manually. This is done using special `{toctree}` | ||
blocks, one per each subdirectory: | ||
````` | ||
```{toctree} | ||
:hidden: | ||
First Topic <topic1.md> | ||
Second Topic <topic2.md> | ||
``` | ||
````` | ||
When adding new documents into the documentation site, make sure that they are mentioned in one of | ||
the toctrees -- otherwise you will see a warning during the build that the document is orphaned. | ||
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### Admonitions | ||
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Admonitions are emphasized blocks of text with a distinct appearance. They are created using the | ||
triple-backticks syntax: | ||
````` | ||
```{note} | ||
Please note this very important caveat. | ||
``` | ||
```{warning} | ||
Don't look down, or you will encounter an error. | ||
``` | ||
```{error} | ||
I told you so. | ||
``` | ||
```{seealso} | ||
Also check out this cool thingy. | ||
``` | ||
````` | ||
```{note} | ||
Please note this very important caveat. | ||
``` | ||
```{warning} | ||
Don't look down, or you will encounter an error. | ||
``` | ||
```{error} | ||
I told you so. | ||
``` | ||
```{seealso} | ||
Also check out this cool thingy. | ||
``` | ||
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### Deprecations | ||
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The special `{deprecated}` block can be used to mark some part of documentation or syntax as being | ||
deprecated. This block requires specifying the version when the deprecation has occurred | ||
````` | ||
```{deprecated} v1.3.0 | ||
Please use this **other** thing instead. | ||
``` | ||
````` | ||
Which would be rendered like this: | ||
```{deprecated} v1.3.0 | ||
Please use this **other** thing instead. | ||
``` | ||
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### Live examples | ||
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Our documentation site includes a custom-built **flutter-app** directive which allows creating | ||
Flutter widgets and embedding them alongside with the overall documentation content. | ||
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In Markdown, the code for inserting an embed looks like this: | ||
`````` | ||
```{flutter-app} | ||
:sources: ../flame/examples | ||
:page: tap_events | ||
:show: widget code popup | ||
``` | ||
`````` | ||
Here's what the different options mean: | ||
- **sources**: specifies the name of the root directory where the Flutter code that you wish to run | ||
is located. This directory must be a Flutter repository, and there must be a `pubspec.yaml` file | ||
there. The path is considered relative to the `doc/_sphinx` directory. | ||
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- **page**: a sub-path within the root directory given in `sources`. This option has two effects: | ||
first, it is appended to the path of the html page of the widget, like so: `main.dart.html?$page`. | ||
Secondly, the button to show the source code of the embed will display the code from the file or | ||
directory with the name given by `page`. | ||
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The purpose of this option is to be able to bundle multiple examples into a single executable. | ||
When using this option, the `main.dart` file of the app should route the execution to the proper | ||
widget according to the `page` being passed. | ||
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- **show**: contains a subset of modes: `widget`, `code`, and `popup`. The `widget` mode creates an | ||
iframe with the embedded example, directly within the page. The `code` mode will show a button | ||
that allows the user to see the code that produced this example. The `popup` mode also shows a | ||
button, which displays the example in an overlay window. This is more suitable for demoing larger | ||
apps. Using both "widget" and "popup" modes at the same time is not recommended. | ||
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```{flutter-app} | ||
:sources: ../flame/examples | ||
:page: tap_events | ||
:show: widget code popup | ||
``` | ||
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## Building documentation locally | ||
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Building the documentation site on your own computer is fairly simple. All you need is the | ||
following: | ||
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1. A working **Flutter** installation, accessible from the command line; | ||
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2. A **Python** environment, with python version 3.6 or higher; | ||
- You can verify this by running `python --version` from the command line; | ||
- Having a dedicated python virtual environment is recommended but not required; | ||
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3. A set of python **modules** listed in the `doc/_sphinx/requirements.txt` file; | ||
- The easiest way to install these is to run | ||
```console | ||
$ pip install -r doc/_sphinx/requirements.txt | ||
``` | ||
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Once these prerequisites are met, you can build the documentation by switching to the `doc/_sphinx` | ||
directory and running `make html`: | ||
```console | ||
$ cd doc/_sphinx | ||
$ make html | ||
``` | ||
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The **make html** command here renders the documentation site into HTML. This command needs to be | ||
re-run every time you make changes to any of the documents. Luckily, it is smart enough to only | ||
rebuild the documents that have changed since the previous run, so usually a rebuild takes only | ||
a second or two. | ||
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There are other make commands that you may find occasionally useful too: **make clean** removes all | ||
cached generated files (in case the system gets stuck in a bad state); and **make linkcheck** to | ||
check whether there are any broken links in the documentation. | ||
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The generated html files will be in the `doc/_build/html` directory, you can view them directly | ||
by opening the file `doc/_build/html/index.html` in your browser. The only drawback is that the | ||
browser won't allow any dynamic content in a file opened from a local drive. The solution to this | ||
is to run your own local http server: | ||
```console | ||
$ python -m http.server 8000 --directory doc/_build/html | ||
``` | ||
Then you can open the site at `http://localhost:8000/`. | ||
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If you ever run the `make clean` command, the server will need to be restarted, because the clean | ||
command deletes the entire `html` directory. |
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# flame | ||
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```{eval-rst} | ||
.. toctree:: | ||
:hidden: | ||
File structure <structure.md> | ||
GameWidget <game_widget.md> | ||
Game loop <game.md> | ||
Components <components.md> | ||
Platforms <platforms.md> | ||
Collision detection <collision_detection.md> | ||
Effects <effects.md> | ||
Camera & Viewport <camera_and_viewport.md> | ||
Camera component <camera_component.md> | ||
Inputs <inputs/inputs.md> | ||
Rendering <rendering/rendering.md> | ||
Other <other/other.md> | ||
```{toctree} | ||
File structure <structure.md> | ||
GameWidget <game_widget.md> | ||
Game loop <game.md> | ||
Components <components.md> | ||
Platforms <platforms.md> | ||
Collision detection <collision_detection.md> | ||
Effects <effects.md> | ||
Camera & Viewport <camera_and_viewport.md> | ||
Camera component <camera_component.md> | ||
Inputs <inputs/inputs.md> | ||
Rendering <rendering/rendering.md> | ||
Other <other/other.md> | ||
``` |
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# flame_audio | ||
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```{eval-rst} | ||
.. toctree:: | ||
:hidden: | ||
General audio <audio.md> | ||
Background music <bgm.md> | ||
AudioPool <audio_pool.md> | ||
```{toctree} | ||
General audio <audio.md> | ||
Background music <bgm.md> | ||
AudioPool <audio_pool.md> | ||
``` |
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# flame_forge2d | ||
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```{eval-rst} | ||
.. toctree:: | ||
:hidden: | ||
Overview <forge2d.md> | ||
```{toctree} | ||
Overview <forge2d.md> | ||
``` |
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# Other Modules | ||
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```{eval-rst} | ||
.. toctree:: | ||
:hidden: | ||
Oxygen <oxygen.md> | ||
Tiled <tiled.md> | ||
Splash screen <splash_screen.md> | ||
```{toctree} | ||
Oxygen <oxygen.md> | ||
Tiled <tiled.md> | ||
Splash screen <splash_screen.md> | ||
``` |
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