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This is the code used to build the faa-cifp-data snap that contains the CIFP data published by the FAA. The resulting snap includes the FAACIFP18 file and an index.bin that is needed by pyefis Virtual VFR feature. The FAACIFP18 file is named current.db and the index.bin is named current.bin. If published, at the time the snap is built, it will also include the next set of data named next.db and next.bin A metadata.yaml file is also provided, it contains the expiration date of the current.db and if included the next.db pyefis will read the metadata.yaml and load the current.db or next.db based on the current system date.

Simply install the pyefis snap from the snapcraft.io store, this snap will be downloaded automatically and connected. You may need to edit your configuration files to update the path to the CIFP data. Within your screen definition these settings will work when running the pyefis snap:

    metadata: /usr/share/makerplane/CIFP/metadata.yaml

It is safe to leave the dbpath and indexpath settings in place, if metadata.yaml exists it will be used, otherwise pyefis will try using dbpath and indexpath

If you want to include this within your custom snap you will first add a plug to your snapcraft.yaml:

plugs:
  faa-cifp-data:
    interface : content
    target: $SNAP/faa-cifp-data
    default-provider: faa-cifp-data

From within your snap the data is accessible at the path $SNAP/faa-cifp-data/CIFP If you do not want to use $SNAP to reference the the data you can update your layout and add a symbolic link in your snapcraft.yaml:

layout:
  /my/custom/path/CIFP:
    symlink: $SNAP/faa-cifp-data/CIFP

Makerplane snaps that consume this content will use /usr/share/makerplane/CIFP for /my/custom/path/CIFP If we implement other sets of FAA data such as DOF for obsticles, that data could be symlinked as /usr/share/makerplane/DOF providing a consistent predictable path for accessing data.

After building and installing your snap you will need to connect it to the faa-cifp-snap:

snap connect mynap:faa-cifp-data faa-cifp-data

Snaps published by makerplane, such as pyefis, will perform this step automatically.

Now you can access the data from within the snap using /my/custom/path/CIFP