Crafting

This section contains guides for putting together your snap and managing its contents.

Basic configuration

The essential elements in a snap are the package information, base, and platforms.

• Configure package information

• Specify a base

• Select platforms

Software dependencies

Much of the work of making a snap is in determining and adding its dependencies.

• Manage dependencies

User settings and data

You can make snap settings available to users, and control its data retention on the user’s machine between versions.

• Add a snap configuration

• Manage data compatibility

Confinement

If your snap needs to make its files available to the host, or it needs less restrictive permissions with the host, you can extend access with layouts and the confinement level.

• Use layouts

• Enable classic confinement

Data contents

Snaps can package plain assets.

• Include local files and remote resources

Process overrides

If you need to manually manipulate a part’s files and data during processing, you can override the lifecycle steps. To speed up the build, you can cache packages downloaded with APT.

• Override the parts lifecycle

• Reuse packages between builds