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import json
from typing import IO, Any
import click
import black
def generate_schema_from_click(
cmd: click.Command,
) -> dict[str, Any]:
result: dict[str, dict[str, Any]] = {}
for param in cmd.params:
if not isinstance(param, click.Option) or param.is_eager:
continue
assert param.name
name = param.name.replace("_", "-")
result[name] = {}
match param.type:
case click.types.IntParamType():
result[name]["type"] = "integer"
case click.types.StringParamType() | click.types.Path():
result[name]["type"] = "string"
case click.types.Choice(choices=choices):
result[name]["enum"] = choices
case click.types.BoolParamType():
result[name]["type"] = "boolean"
case _:
msg = f"{param.type!r} not a known type for {param}"
raise TypeError(msg)
if param.multiple:
result[name] = {"type": "array", "items": result[name]}
result[name]["description"] = param.help
default = param.to_info_dict()["default"]
if default is not None and not param.multiple:
result[name]["default"] = default
return result
@click.command(context_settings={"help_option_names": ["-h", "--help"]})
@click.option("--schemastore", is_flag=True, help="SchemaStore format")
@click.option("--outfile", type=click.File(mode="w"), help="Write to file")
def main(schemastore: bool, outfile: IO[str]) -> None:
properties = generate_schema_from_click(black.main)
del properties["line-ranges"]
schema: dict[str, Any] = {
"$schema": "http://json-schema.org/draft-07/schema#",
"$id": (
"https://github.com/psf/black/blob/main/src/black/resources/black.schema.json"
),
"$comment": "tool.black table in pyproject.toml",
"type": "object",
"additionalProperties": False,
"properties": properties,
}
if schemastore:
schema["$id"] = "https://json.schemastore.org/partial-black.json"
# The precise list of unstable features may change frequently, so don't
# bother putting it in SchemaStore
schema["properties"]["enable-unstable-feature"]["items"] = {"type": "string"}
print(json.dumps(schema, indent=2), file=outfile)
if __name__ == "__main__":
main()
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