canonical/multipass

[snap] improve error messages when confinement may be the culprit

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#1,795 opened on Oct 12, 2020

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good first issuelinuxmediumsnap

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Description

There are cases when commands acting on files from outside Multipass (launch file://..., transfer) may fail due to confinement.

We should try and be helpful to the user, suggesting what can be done to help (moving the file out of /tmp, connecting the home-all and removable-media plugs).

Contributor guide

Research direction
Investigate the code paths for `launch`, `transfer`, and other commands that access external files. Identify where error messages are produced when these operations fail. Explore the snap confinement documentation to understand expected failures and how to detect them in code. Then, modify the error handling to provide actionable suggestions such as moving the file to a standard location or connecting required snap interfaces.
Tech stack
cpp
Domain
clidevops
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++Git
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75