Interface for reading files in /usr

[Cris Dywan]

This is arguably a somewhat specialzed use case in context of development, but I noticed I can't use ag (ag-mcphail, grep/ack alternative) to search files in /usr:

1. snap install ag-mcphail
2. ag-mcphail.ag time_t /usr/include
ERR: Error opening directory /usr/include: Permission denied

The snap's using the "home" interface, but it can't access files in /usr.

Ugly Work-around:

/snap/ag-mcphail/current/bin/ag time_t /usr/include

[Jamie Strandboge (jdstrand)]

ag is apparently https://github.com/ggreer/the_silver_searcher and it is a code searching tool. Of course we could add an interface for /usr and the implementation would be simple, but then someone will ask for /srv, /opt, /home/*, /var/imports, etc, etc. I'm not sure how to proceed with this request since the request is at odds with snappy's application isolation goals (not to mention on a classic system the things you want to search may not be bind mounted into the snap's runtime).

Can other members of the interfaces team weigh in?