code scanner prototype

First prototype of the code scanner

Usage example

swh scanner scan "/path/to/scan"

sample output (using swh-py-template as a source path):

swh/
debian/
.git/
│   refs/
│   │   heads/
│   │   │   master
│   │   remotes/
│   │   tags/
│   hooks/
│   │   pre-receive.sample
│   │   pre-push.sample
│   │   update.sample
│   │   pre-rebase.sample
│   │   fsmonitor-watchman.sample
│   │   post-update.sample
│   │   pre-commit
│   │   pre-commit.sample
│   │   prepare-commit-msg.sample
│   │   commit-msg.sample
│   │   pre-applypatch.sample
│   │   applypatch-msg.sample
│   objects/
│   │   pack/
│   │   │   pack-750cdb447ff562005695fc225fc7f81ba936b697.pack
│   │   │   pack-750cdb447ff562005695fc225fc7f81ba936b697.idx
│   │   info/
│   info/
│   logs/
│   │   refs/
│   │   │   heads/
│   │   │   │   master
│   │   │   remotes/
│   │   │   │   origin/
│   │   │   │   │   HEAD
│   │   HEAD
│   branches/
│   description
│   ORIG_HEAD
│   HEAD
│   config
│   FETCH_HEAD
│   packed-refs
│   index
docs/
requirements-swh.txt
README.md
AUTHORS
requirements.txt
MANIFEST.in
pytest.ini
mypy.ini
LICENSE
CONTRIBUTORS
requirements-test.txt
.gitignore
Makefile
tox.ini
setup.py
CODE_OF_CONDUCT.md
.pre-commit-config.yaml

The output has colors indicating if a directory or a file is discovered: If a directory is blue means that all the contents inside are found, otherwise it's red. For each red directory, the file is green if it's found otherwise it's red.

---

Migrated from D2657 (view on Phabricator)

swh/foo/cli.py

-import click
-
-from swh.core.cli import CONTEXT_SETTINGS
-
-
-@click.group(name='foo', context_settings=CONTEXT_SETTINGS)
-@click.pass_context
-def cli(ctx):
-    """Foo main command.
-    """
-
-
-@cli.command()
-@click.option('--bar', help='Something')
-@click.pass_context
-def bar(ctx, bar):
-    '''Do something.'''
-    click.echo('bar')