snapcraft 8.0.2+ python plugin classic core22 snap ModuleNotFoundError

[philroche]

Bug Description

We maintain a private snap where we build a classic snap

This is not an issue with using snapcraft 7.5.4. To unblock ourselves we have pinned to 7.5.4.

To Reproduce

Build a classic snap with core22 as a base using plugin: python. Try and run any of the snap apps.

Environment

Snapcraft is being with default config and being run with snapcraft --enable-manifest

snapcraft.yaml

name: REDACTED
summary: REDACTED
description: REDACTED

base: core22
grade: devel
confinement: classic
adopt-info: REDACTED
environment:
    LC_ALL: C.UTF-8
    LANG: C.UTF-8

parts:
    REDACTED:
        plugin: python
        source: .
        source-type: git
        build-attributes:
            - enable-patchelf
        build-packages:
            - git
            - python3
            - libapt-pkg-dev
            - gcc
            - g++
            - dpkg-dev
        stage-packages:
            - libpython3.10-minimal
            - libpython3.10-stdlib
            - python3.10-minimal
            - python3.10-venv
        override-pull: |
            craftctl default
            DATE="$(date +%Y.%m.%d)"
            GIT="$(git rev-parse --short HEAD)"
            craftctl set version="${DATE}+git${GIT}"
apps:
    REDACTED:
        command: bin/REDACTED

Relevant log output

from REDACTED.generate import generate_REDACTED
ModuleNotFoundError: No module named 'REDACTED'

Additional context

Apologies for the REDACTED references but this is a private project.

[syncronize-issues-to-jira]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-2550.

This message was autogenerated

[tigarmo]

Thanks for the report. I have a strong suspicion that the cause of this bug is us dropping the PATH setting for classic snaps. Specifically, when I pack a classic snap with Snapcraft 7 I get this in meta/snap.yaml:

...
confinement: classic
environment:
  LD_LIBRARY_PATH: ${SNAP_LIBRARY_PATH}${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}:$SNAP/lib:$SNAP/usr/lib
  PATH: $SNAP/usr/sbin:$SNAP/usr/bin:$SNAP/sbin:$SNAP/bin:$PATH

... while in Snapcraft 8 I get:

...
confinement: classic
# no environment setting at all

@philroche does it work in Snapcraft 8 if you changed the app's command from bin/REDACTED to bin/python $SNAP/bin/REDACTED?

[philroche]

bin/python3 $SNAP/bin/REDACTED does work yes.

Also I am currently unable to replicate the issue with snapcraft 8.0.3

[philroche]

Also I am currently unable to replicate the issue with snapcraft 8.0.3

No longer true. I still had a python virtual env active with these modules available. Apologies for confusion.