generate-shell-completion: slight refactor

The next commit will be easier to do in the `uv-cli` crate since it
explicitly depends on `clap-complete`.

crates/uv-cli/src/lib.rs

@@ -6,7 +6,7 @@ use std::str::FromStr;
 use anyhow::{anyhow, Result};
 use clap::builder::styling::{AnsiColor, Effects, Style};
 use clap::builder::Styles;
-use clap::{Args, Parser, Subcommand};
+use clap::{Args, CommandFactory, Parser, Subcommand};
 use distribution_types::{FlatIndexLocation, IndexUrl};
 use pep508_rs::Requirement;
 use pypi_types::VerbatimParsedUrl;
@@ -4234,3 +4234,10 @@ pub struct DisplayTreeArgs {
  #[arg(long, alias = "reverse")]
  pub invert: bool,
 }
+
+pub fn generate_shell_completion(
+ shell: &clap_complete_command::Shell,
+ buffer: &mut dyn std::io::Write,
+) {
+ shell.generate(&mut Cli::command(), buffer);
+}

crates/uv/src/lib.rs

@@ -6,7 +6,7 @@ use std::process::ExitCode;
 use anstream::eprintln;
 use anyhow::Result;
 use clap::error::{ContextKind, ContextValue};
-use clap::{CommandFactory, Parser};
+use clap::Parser;
 use owo_colors::OwoColorize;
 use settings::PipTreeSettings;
 use tracing::{debug, instrument};
@@ -773,7 +773,7 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
  Ok(ExitStatus::Success)
  }
  Commands::GenerateShellCompletion(args) => {
- args.shell.generate(&mut Cli::command(), &mut stdout());
+ uv_cli::generate_shell_completion(&args.shell, &mut stdout());
  Ok(ExitStatus::Success)
  }
  Commands::Tool(ToolNamespace {