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# gst-build
GStreamer [meson](http://mesonbuild.com/) based repositories aggregrator
You can build GStreamer and all its modules at once using
meson and its [subproject](https://github.com/mesonbuild/meson/wiki/Subprojects) feature.
## Getting started
### Install meson and ninja
You should get meson through your package manager or using:
$ pip3 install --user meson
You should get `ninja` using your package manager or downloading it from
[here](https://github.com/ninja-build/ninja/releases).
### Build GStreamer and its modules
You can get all GStreamer built running:
```
mkdir build/ && meson build && ninja -C build/
```
NOTE: on fedora (and maybe other distributions) replace `ninja` with `ninja-build`
# Development environment
## Uninstalled environment
gst-build also contains a special `uninstalled` target that lets you enter an
uninstalled development environment where you will be able to work on GStreamer
easily. You can get into that environment running:
```
ninja -C build/ uninstalled
```
If your operating system handles symlinks, built modules source code will be
available at the root of `gst-build/` for example GStreamer core will be in
`gstreamer/`. Otherwise they will be present in `subprojects/`. You can simply
hack in there and to rebuild you just need to rerun `ninja -C build/`.
NOTE: In the uninstalled environment, a fully usable prefix is also configured
in `gst-build/prefix` where you can install any extra dependency/project.
## Update git subprojects
We added a special `update` target to update subprojects (it uses `git pull
--rebase` meaning you should always make sure the branches you work on are
following the right upstream branch, you can set it with `git branch
--set-upstream-to origin/master` if you are working on `gst-build` master
branch).
Update all GStreamer modules and rebuild:
```
ninja -C build/ update
```
Update all GStreamer modules without rebuilding:
```
ninja -C build/ git-update
```
## Custom subprojects
We also added a meson option, 'custom_subprojects', that allows the user
to provide a comma-separated list of subprojects that should be built
alongside the default ones.
To use it:
```
cd subprojects
git clone my_subproject
cd ../build
rm -rf * && meson .. -Dcustom_subprojects=my_subproject
ninja
```
## Run tests
You can easily run the test of all the components:
```
meson test -C build
```
To list all available tests:
```
meson test -C build --list
```
To run all the tests of a specific component:
```
meson test -C build --suite gst-plugins-base
```
Or to run a specific test:
```
meson test -C build/ --suite gstreamer gst/gstbuffer
```
## Add information about GStreamer development environment in your prompt line
### Bash prompt
We automatically handle `bash` and set `$PS1` accordingly
### Zsh prompt
In your `.zshrc`, you should add something like:
```
export PROMPT="$GST_ENV-$PROMPT"
```
### Fish prompt
In your `~/.config/fish/functions/fish_prompt.fish`, you should add something like this at the end of the fish_prompt function body:
```
if set -q GST_ENV
echo -n -s (set_color -b blue white) "(" (basename "$GST_ENV") ")" (set_color normal) " "
end
```
### Using powerline
In your powerline theme configuration file (by default in
`{POWERLINE INSTALLATION DIR}/config_files/themes/shell/default.json`)
you should add a new environment segment as follow:
```
{
"function": "powerline.segments.common.env.environment",
"args": { "variable": "GST_ENV" },
"priority": 50
},
```
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