snapcraft crashes if machine not connected to internet

[keshavbhatt]

snapcraft both from stable and edge channel crashes if the machine have no internet access.

snapcraft.yaml(https://paste.ubuntu.com/p/fF5Wrv5hny/)
Note that the snap file has nothing that has to be downloaded (no stage-packages property).
`snapcraft --destructive-mode` won't even work.(Where there is no need to create a VM)

Traceback:

`Traceback (most recent call last):
  File "/snap/snapcraft/4332/bin/snapcraft", line 11, in <module>
    load_entry_point('snapcraft==3.9.1', 'console_scripts', 'snapcraft')()
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/snapcraft/cli/_command.py", line 88, in invoke
    return super().invoke(ctx)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/snapcraft/cli/lifecycle.py", line 280, in snap
    _execute(steps.PRIME, parts=[], pack_project=True, output=output, **kwargs)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/snapcraft/cli/lifecycle.py", line 78, in _execute
    lifecycle.execute(step, project_config, parts)
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/snapcraft/internal/lifecycle/_runner.py", line 104, in execute
    installed_snaps += repo.snaps.install_snaps([content_snap])
  File "/snap/snapcraft/4332/lib/python3.6/site-packages/snapcraft/internal/repo/snaps.py", line 298, in install_snaps
    snap_pkg_channel = snap_pkg.get_store_snap_info()["channel"]
TypeError: 'NoneType' object is not subscriptable
`

[Sergio Schvezov (sergiusens)]

I believe this was actually released. Please reopen if it has not.

[Felipe Reyes (freyes)]

I'm getting stacktrace on snapcraft 7.2.6 and 7.2.7

Traceback (most recent call last):
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/snapcraft_legacy/cli/legacy.py", line 27, in legacy_run
    run()
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/snapcraft_legacy/cli/lifecycle.py", line 406, in snap
    _execute(steps.PRIME, parts=tuple(), pack_project=True, output=output, **kwargs)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/snapcraft_legacy/cli/lifecycle.py", line 121, in _execute
    lifecycle.execute(step, project_config, parts)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/snapcraft_legacy/internal/lifecycle/_runner.py", line 122, in execute
    installed_snaps = _install_build_snaps(
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/snapcraft_legacy/internal/lifecycle/_runner.py", line 83, in _install_build_snaps
    installed_snaps = repo.snaps.install_snaps(build_snaps)
  File "/snap/snapcraft/8513/lib/python3.8/site-packages/snapcraft_legacy/internal/repo/snaps.py", line 295, in install_snaps
    snap_pkg_channel = snap_info["channel"]
TypeError: 'NoneType' object is not subscriptable

[Felipe Reyes (freyes)]

I can't reopen this bug, should I just file a new one?. It's worth to mention this is happening to me when running "snapcraft --use-lxd" on a slow Hotel's internet.

[Pirouette Cacahuète (lissyx)]

Same on 7.2.8 on a fresh setup.

[Patrik Wenger (paddor)]

This still happens on 8.0.3 with `--use-lxd`. What's happening with Snapcraft?

[Callahan Kovacs (mr-cal)]

Hi @paddor,

The above is a report from Snapcraft 3.9.1.

Snapcraft requires network connectivity to run, but snapcraft should provide errors instead of tracebacks when the network is unavailable. Can you post your logs?