Generate custom JSON schema for dynamic setting (#9632)

## Summary

If you paste in the TOML for our default configuration (from the docs),
it's rejected by our JSON Schema:

![Screenshot 2024-01-23 at 10 08
09 PM](7b4ea6e8-07db-4590-bd1e-73a01a35d747)

It seems like the issue is with:

```toml
# Set the line length limit used when formatting code snippets in
# docstrings.
#
# This only has an effect when the `docstring-code-format` setting is
# enabled.
docstring-code-line-length = "dynamic"
```

Specifically, since that value uses a custom Serde implementation, I
guess Schemars bails out? This PR adds a custom representation to allow
`"dynamic"` (but no other strings):

![Screenshot 2024-01-23 at 10 27
21 PM](ab7809d4-b077-44e9-8f98-ed893aaefe5d)

This seems like it should work but I don't have a great way to test it.

Closes https://github.com/astral-sh/ruff/issues/9630.
This commit is contained in:
Charlie Marsh 2024-01-23 23:26:02 -05:00 committed by GitHub
parent 87821252d7
commit b0d6fd7343
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2 changed files with 44 additions and 5 deletions

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@ -1,10 +1,11 @@
use std::fmt;
use std::path::Path;
use std::str::FromStr;
use ruff_formatter::printer::{LineEnding, PrinterOptions, SourceMapGeneration};
use ruff_formatter::{FormatOptions, IndentStyle, IndentWidth, LineWidth};
use ruff_macros::CacheKey;
use ruff_python_ast::PySourceType;
use std::fmt;
use std::path::Path;
use std::str::FromStr;
/// Resolved options for formatting one individual file. The difference to `FormatterSettings`
/// is that `FormatterSettings` stores the settings for multiple files (the entire project, a subdirectory, ..)
@ -367,15 +368,39 @@ impl fmt::Display for DocstringCode {
#[cfg_attr(feature = "serde", serde(untagged))]
#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
pub enum DocstringCodeLineWidth {
/// Wrap docstring code examples at a fixed line width.
Fixed(LineWidth),
/// Respect the line length limit setting for the surrounding Python code.
#[default]
#[cfg_attr(
feature = "serde",
serde(deserialize_with = "deserialize_docstring_code_line_width_dynamic")
)]
#[cfg_attr(feature = "schemars", schemars(with = "DynamicSchema"))]
Dynamic,
}
/// A dummy type that is used to generate a schema for `DocstringCodeLineWidth::Dynamic`.
#[cfg(feature = "schemars")]
struct DynamicSchema;
#[cfg(feature = "schemars")]
impl schemars::JsonSchema for DynamicSchema {
fn schema_name() -> String {
"Dynamic".to_string()
}
fn json_schema(_: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
schemars::schema::SchemaObject {
instance_type: Some(schemars::schema::InstanceType::String.into()),
const_value: Some("dynamic".to_string().into()),
..Default::default()
}
.into()
}
}
impl fmt::Debug for DocstringCodeLineWidth {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {