astral-sh/ruff · error · ruff_server::server::api::Error

-32603

-32603

Error message

uv was not found; is it installed and on the PATH?

What it means

Error "uv was not found; is it installed and on the PATH?" thrown in astral-sh/ruff.

Source

Thrown at crates/ruff_server/src/format.rs:315

        command.stdout(Stdio::piped());
        command.stderr(Stdio::piped());

        command
    }

    /// Execute the format command on the given source.
    fn format(
        &self,
        source: &str,
        path: &Path,
        range_with_index: Option<(TextRange, &LineIndex)>,
    ) -> crate::Result<FormatResult> {
        let mut command =
            self.build_command(path, range_with_index.map(|(r, idx)| (r, idx, source)));
        let mut child = match command.spawn() {
            Ok(child) => child,
            Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
                anyhow::bail!("uv was not found; is it installed and on the PATH?")
            }
            Err(err) => return Err(err).context("Failed to spawn uv"),
        };

        let mut stdin = child
            .stdin
            .take()
            .context("Failed to get stdin from format subprocess")?;
        stdin
            .write_all(source.as_bytes())
            .context("Failed to write to stdin")?;
        drop(stdin);

        let result = child
            .wait_with_output()
            .context("Failed to get output from format subprocess")?;

        if !result.status.success() {

View on GitHub (pinned to 672bb4edf0)

When it happens

Trigger: Thrown at crates/ruff_server/src/format.rs:315 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of astral-sh/ruff@672bb4edf0 (2026-08-16). Data as JSON: /api/errors/11efb7950e5a9fbc. Report an issue: GitHub.