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New datasette skeleton command for generating metadata.json

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Closes #164
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Simon Willison 2017-12-06 22:20:37 -08:00
commit 32cf5a4a72
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58
datasette/cli.py
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@ -104,6 +104,64 @@ def publish(publisher, files, name, metadata, extra_options, force, branch, **ex
call(["heroku", "builds:create", "-a", app_name])
@cli.command()
@click.argument('files', type=click.Path(exists=True), nargs=-1, required=True)
@click.option(
'-m', '--metadata', default='metadata.json',
help='Name of metadata file to generate'
)
@click.option(
'sqlite_extensions', '--load-extension', envvar='SQLITE_EXTENSIONS', multiple=True,
type=click.Path(exists=True, resolve_path=True), help='Path to a SQLite extension to load'
)
def skeleton(files, metadata, sqlite_extensions):
"Generate a skeleton metadata.json file for specified SQLite databases"
if os.path.exists(metadata):
click.secho(
'File {} already exists, will not over-write'.format(metadata),
bg='red',
fg='white',
bold=True,
err=True,
)
sys.exit(1)
app = Datasette(files, sqlite_extensions=sqlite_extensions)
databases = {}
for database_name, info in app.inspect().items():
databases[database_name] = {
'title': None,
'description': None,
'description_html': None,
'license': None,
'license_url': None,
'source': None,
'source_url': None,
'queries': {},
'tables': {
table_name: {
'title': None,
'description': None,
'description_html': None,
'license': None,
'license_url': None,
'source': None,
'source_url': None,
} for table_name in (info.get('tables') or {})
}
}
open(metadata, 'w').write(json.dumps({
'title': None,
'description': None,
'description_html': None,
'license': None,
'license_url': None,
'source': None,
'source_url': None,
'databases': databases
}, indent=4))
click.echo('Wrote skeleton to {}'.format(metadata))
@cli.command()
@click.argument('files', type=click.Path(exists=True), nargs=-1, required=True)
@click.option(