Running lnav with snap cannot access files in /etc/ or /usr

[jay-sridharan]

lnav version
v0.11.1 is the latest

Describe the bug
Custom formats are not read from /etc/ or /usr/ because the snap is running in strictly confined mode.

To Reproduce
Steps to reproduce the behavior:

• Install lnav through sudo snap install lnav
• Add a custom format to /etc/lnav/formats/new-format/new-format.json
• Run lnav -d debug.log <random_file>
• Note that new-format.json is not loaded.

This is because the system-files interface is not used in the snapcraft.yaml. Something like this

plugs:
  etc-lnav:
    interface: system-files
    read:
    - /etc/lnav

Alternatively, the confinement should be changed to classic so that the package has access to system files.

[piotr-dobrogost]

Previous issues where classic confinement was mentioned: #970, #525

[tstack]

I've added the plug as you mentioned, but it seems to need a manual review, which they are taking their time doing...

[tstack]

The request was approved, so I think this should work now.