How to map files under $SNAP_DATA to active configuration

[chockalingam]

Hello Community,

I have created a snap and it contains configuration files, which are saved under $SNAP_DATA. During the runtime, I want to edit the configuration files in order to integrate other components.

By referring few documentation and example codes, I was able to create an empty folder inside the active configuration. But, I do not know how to map the files under $SNAP_DATA to this folder. 

First, is it possible to map the files in this way? If yes, please let me know the steps to perform.

Thank you

[bostroemc]

CodeShepherd describes in this thread how to copy files to the active configuration using a hook.  See script "connect-plug-active-solution".

[chockalingam]

Hello,

Thank you for the response. Actually, what I want to achieve is something different. 

I am following this source https://github.com/giaever-online-iot/home-assistant-snap/blob/master/snap/snapcraft.yaml  to generate a snap for home assistant.

Under apps, the command bin/hass --config $SNAP_DATA starts the application and generates few configuration files and folders, which will get stored at $SNAP_DATA. The command takes a path as arguement, where there files and folders need to be stored.

I have modified the command to bin/hass --config /var/snap/rexroth-solutions/common/solutions/activeConfiguration/home-assistant/config

At the moment, I am facing the following issue: Fatal Error: Unable to create library directory /var/snap/rexroth-solutions/common/solutions/activeConfiguration/home-assistant/config/deps: [Errno 13] Permission denied: '/var/snap/rexroth-solutions/common/solutions/activeConfiguration/home-assistant/config/deps' 

Steps I have followed so far:

1. Added a shell script, which will create a folder named home-assistant and sub folder named config inside activeConfiguration directory.

2. Added configs folder with package-assets file

3. Added active-solution plugs to snapcraft.yaml

4. Added parts to dump shell script and package-assets

5. Added hooks connect-plug-active-solution

I have attached the complete project as Zip. Please, let me know where I am making mistakes. Any help would be highly appreciable. 

Thanks & Regards

[MauroRiboniMX · Accepted solution]

Hello,

Try to follow this how to step by step:

SDK - Empower your app with Data Persistance

ANd tell me where you got stuck 🙂

[chockalingam]

Hi Riboni,

The post really helped me.

I made a mistake of not naming the package manifest file same as snapcraft project name. Renaming it, fixed the issue and directory now got the permission to map files.

Thanks & Regards