custom-pi-gadget
This is a branch to allow you to build a customized Ubuntu Core gadget snap that makes it easy to add the required API key, make changes to the configure hook of the gadget to apply any gadget-side first-boot configuration or easily add any interface slots to the snapcraft.yaml
Building the gadget will re-use the binaries from the existing pi gadget in the store so no compilation is happening, just a re-packing.
Customizing
To add an API key for the Serial Vault just edit snapcraft.yaml and add a value to the already existing MODEL_APIKEY variable.
If you need any additional bits for your device onboarding, you can add them to the prepare-device hook in the snap/hooks/ directory.
To do any custom first-boot configuration you can edit the snap/hooks/configure script. Do not forget to add the correct interface hooks to the snapcraft.yaml in case commands added to the hook require them.
You might want to change the name: field to not have your package called "custom-pi-gadget".
Building
simply clone this git tree, install the snapcraft snap with
snap install snapcraft --classic
and run the snapcraft command in the toplevel of the cloned directory.
This gadget is buildable on x86 as well as on arm64 systems and will always produce an arm64 snap.