TypeError: load() missing 1 required positional argument: 'Loader'

[Kenneth Loafman]

Bad ending while trying to build duplicity snap on GitLab.

Sorry, an error occurred in Snapcraft:
We would appreciate it if you created a bug report at
https://launchpad.net/snapcraft/+filebug with the above text included.
Traceback (most recent call last):
  File "/usr/bin/snapcraft", line 11, in <module>
    load_entry_point('snapcraft==2.43.1+18.4.1', 'console_scripts', 'snapcraft')()
  File "/usr/lib/python3/dist-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3/dist-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3/dist-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3/dist-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 136, in snap
    project = _execute(steps.PRIME, parts=[], **kwargs)
  File "/usr/lib/python3/dist-packages/snapcraft/cli/lifecycle.py", line 35, in _execute
    lifecycle.execute(step, project_config, parts)
  File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 90, in execute
    executor.run(step, part_names)
  File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 196, in run
    self._create_meta(step, processed_part_names)
  File "/usr/lib/python3/dist-packages/snapcraft/internal/lifecycle/_runner.py", line 354, in _create_meta
    common.env = self.config.snap_env()
  File "/usr/lib/python3/dist-packages/snapcraft/internal/project_loader/_config.py", line 289, in snap_env
    dependency_paths |= part.get_primed_dependency_paths()
  File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 885, in get_primed_dependency_paths
    state = self.get_prime_state()
  File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 144, in get_prime_state
    self._prime_state = cast(states.PrimeState, self.get_state(steps.PRIME))
  File "/usr/lib/python3/dist-packages/snapcraft/internal/pluginhandler/__init__.py", line 148, in get_state
    return states.get_state(self.plugin.statedir, step)
  File "/usr/lib/python3/dist-packages/snapcraft/internal/states/_state.py", line 96, in get_state
    state = yaml.load(f.read())
TypeError: load() missing 1 required positional argument: 'Loader'

[Kenneth Loafman (kenneth-loafman)]

Any workaround for this? It's important to me.

[Sergio Schvezov (sergiusens)]

Is there a reason for using snapcraft from the deb for 18.04 instead of the snap?

[Kenneth Loafman (kenneth-loafman)]

Because snapcraft from deb is available on GitLab and should be kept up-to-date by Ubuntu.

I tried on 20.04 with the following GitLab job:

build_snap:
    stage: deploy
    when: manual
    image: ubuntu:20.04
    only: [master]
    script:
        - apt-get update
        - apt-get upgrade -y
        - apt-get install -y snapd snapcraft
        - snap install snapd classic
        - snap install snapcraft classic
        - VERSION=`./setup.py --version`
        - echo "make snap of ${VERSION}"
        - ./setup.py sdist --dist-dir=.
        - rm -rf build
        - mkdir -p build
        - tar xf duplicity-${VERSION}.tar.gz -C build
        - rm -f duplicity-${VERSION}.tar.gz
        - cd build/duplicity-${VERSION}
        - head -2 snap/snapcraft.yaml | tail -1
        - echo $SNAPCRAFT_LOGIN_FILE | base64 --decode --ignore-garbage > snaplogin
        - snapcraft login --with snaplogin
        - rm snaplogin
        - snapcraft snap
        - snapcraft push duplicity_*.snap --release edge

It gets to the 3rd step, successfully installs snapd and hangs on installing snapcraft. I need snapd and snapcraft so I can bootstrap snapd and snapcraft snaps from the store.

[Kenneth Loafman (kenneth-loafman)]

For log see https://gitlab.com/duplicity/duplicity/-/jobs/2097581322

[Kenneth Loafman (kenneth-loafman)]

This bug was due to the Docker core18 being used and needs a Docker image with Snapcraft installed.