Build fails with charmcraft 1.7

[Giuseppe Petralia]

Master branch build (with tox -e build) fails when using charmcraft 1.7 with:

2022-06-06 11:57:09.064 Starting charmcraft version 1.7.0
2022-06-06 11:57:09.088 Raw pre-parsed sysargs: args={'help': False, 'verbose': True, 'quiet': False, 'trace': False, 'project_dir': None} filtered=['pack', '--bases-index', '0']
2022-06-06 11:57:09.088 General parsed sysargs: command='pack' args=['--bases-index', '0']
2022-06-06 11:57:09.142 Command parsed sysargs: Namespace(bases_index=[0], debug=False, destructive_mode=False, entrypoint=None, force=False, requirement=None, shell=False, shell_after=False)
2022-06-06 11:57:09.145 System details: OSPlatform(system='ubuntu', release='20.04', machine='x86_64'); Environment: CHARMCRAFT_MANAGED_MODE='1'
2022-06-06 11:57:09.145 Packing the charm.
2022-06-06 11:57:09.146 Working arguments: {'from': PosixPath('/root/project'), 'destructive_mode': False, 'entrypoint': None, 'requirement': [], 'bases_indices': None, 'force': False, 'debug': False, 'shell': False, 'shell_after': False}
2022-06-06 11:57:09.146 Reading '/root/project/metadata.yaml'
2022-06-06 11:57:09.226 Validating metadata format
2022-06-06 11:57:09.290 Building for 'bases[0]' as host matches 'build-on[0]'.
2022-06-06 11:57:09.293 Building for 'bases[0][0]'.
2022-06-06 11:57:09.293 Building charm in '/root'
2022-06-06 11:57:09.296 Charm entry point was not found: '/root/project/src/charm.py'
2022-06-06 11:57:09.298 Full execution log: '/tmp/charmcraft.log'

Workaround is to use charmcraft 1.5

[Felipe Reyes (freyes)]

This is true for all the openstack charms. More details at https://github.com/openstack-charmers/release-tools/pull/233