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Update packaging_apps_multiinstance.md

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julien.malik@paraiso.me 2016-02-25 13:13:38 +01:00 committed by YunoHost
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packaging_apps_multiinstance.md
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<a class="btn btn-lg btn-default" href="packaging_apps_en">Application packaging</a> <a class="btn btn-lg btn-default" href="packaging_apps_en">Application packaging</a>
### Multi-instance ### Multi-instance
Multi-instance is application capacity to be installed many times. Multi-instance is application capacity to be installed several times.
#### Scripts #### Scripts
When YunoHost install a second time the application, it give to the script at last argument `id__2` with the application `id` comming from the manifest. The value `n` in `id__n` is incremented at each new instance of the application. When YunoHost installs the application a second time, it gives to the script, at last argument, `${id}__2` with the application `${id}` coming from the manifest. The value `n` in `${id}__n` is incremented each time a new instance of the application is installed.
**E.g.** in the roundcube script, database is called `roundcube`, the install directory `roundcube` and the [Nginx configuration](packaging_apps_nginx_conf_en) `roundcube`. This way, the second instance of roundcube will not conflict with the first one, and will be installed in the `roundcube__2` database, in the `roundcube__2`directory, and with the `roundcube__2` Nginx configuration. **E.g.** in the roundcube script, database is called `roundcube`, the install directory `roundcube` and the [Nginx configuration](packaging_apps_nginx_conf_en) `roundcube`. This way, the second instance of roundcube will not conflict with the first one, and will be installed in the `roundcube__2` database, in the `roundcube__2`directory, and with the `roundcube__2` Nginx configuration.
Retrieve last variable gived to scripts: Retrieve last variable given to scripts:
```bash ```bash
APP=${!#} APP=${!#}
``` ```