Use uv in rye build when enabled (#978)

The `build` package supports uv since version 1.2.0 - it can use either
uv or pip as installer.

The main way to use it would be to install `build[uv]` but rye already
has uv installed separately, build will find it on the path as a
fallback, so this can work for rye.

build is implicitly tested by test_publish.

Relates to #668

CHANGELOG.md

@@ -7,6 +7,8 @@ that were not yet released.
 
 _Unreleased_
 
+- Use uv in `rye build` when uv is enabled. #978
+
 <!-- released start -->
 
 ## 0.33.0

rye/src/bootstrap.rs

@@ -33,10 +33,10 @@ pub const SELF_PYTHON_TARGET_VERSION: PythonVersionRequest = PythonVersionReques
     suffix: None,
 };
 
-const SELF_VERSION: u64 = 17;
+const SELF_VERSION: u64 = 18;
 
 const SELF_REQUIREMENTS: &str = r#"
-build==1.1.1
+build==1.2.1
 certifi==2024.2.2
 charset-normalizer==3.3.2
 click==8.1.7

rye/src/cli/build.rs

@@ -2,13 +2,15 @@ use std::fs;
 use std::path::PathBuf;
 use std::process::{Command, Stdio};
 
-use anyhow::{bail, Error};
+use anyhow::{anyhow, bail, Error};
 use clap::Parser;
 use console::style;
 
 use crate::bootstrap::ensure_self_venv;
+use crate::config::Config;
 use crate::pyproject::{locate_projects, PyProject};
-use crate::utils::{get_venv_python_bin, CommandOutput, IoPathContext};
+use crate::utils::{get_venv_python_bin, prepend_path_to_path_env, CommandOutput, IoPathContext};
+use crate::uv::UvBuilder;
 
 /// Builds a package for distribution.
 #[derive(Parser, Debug)]
@@ -44,7 +46,7 @@ pub struct Args {
 
 pub fn execute(cmd: Args) -> Result<(), Error> {
     let output = CommandOutput::from_quiet_and_verbose(cmd.quiet, cmd.verbose);
-    let venv = ensure_self_venv(output)?;
+    let self_venv = ensure_self_venv(output)?;
     let project = PyProject::load_or_discover(cmd.pyproject.as_deref())?;
 
     let out = match cmd.out {
@@ -61,6 +63,7 @@ pub fn execute(cmd: Args) -> Result<(), Error> {
         }
     }
 
+    let use_uv = Config::current().use_uv();
     let projects = locate_projects(project, cmd.all, &cmd.package[..])?;
 
     for project in projects {
@@ -75,21 +78,36 @@ pub fn execute(cmd: Args) -> Result<(), Error> {
             style(project.normalized_name()?).cyan()
         );
 
-        let mut build_cmd = Command::new(get_venv_python_bin(&venv));
+        let mut build_cmd = Command::new(get_venv_python_bin(&self_venv));
         build_cmd
             .arg("-mbuild")
             .env("NO_COLOR", "1")
             .arg("--outdir")
             .arg(&out)
             .arg(&*project.root_path());
 
+        if use_uv {
+            // we need to ensure uv is available to use without installing it into self_venv
+            let uv = UvBuilder::new().with_output(output).ensure_exists()?;
+            let uv_dir = uv
+                .uv_bin()
+                .parent()
+                .ok_or_else(|| anyhow!("Could not find uv binary in self venv: empty path"))?;
+            build_cmd.env("PATH", prepend_path_to_path_env(uv_dir)?);
+            build_cmd.arg("--installer=uv");
+        }
+
         if cmd.wheel {
             build_cmd.arg("--wheel");
         }
         if cmd.sdist {
             build_cmd.arg("--sdist");
         }
 
+        if output == CommandOutput::Verbose {
+            build_cmd.arg("--verbose");
+        }
+
         if output == CommandOutput::Quiet {
             build_cmd.stdout(Stdio::null());
             build_cmd.stderr(Stdio::null());

rye/src/utils/mod.rs

@@ -1,5 +1,6 @@
 use std::borrow::Cow;
 use std::convert::Infallible;
+use std::ffi::OsString;
 use std::io::{Cursor, Read};
 use std::path::{Path, PathBuf};
 use std::process::{Command, ExitStatus, Stdio};
@@ -234,6 +235,16 @@ where
     ENV_VAR_RE.replace_all(string, |m: &Captures| f(&m[1]).unwrap_or_default())
 }
 
+/// Prepend the given path to the current value of the $PATH environment variable
+pub fn prepend_path_to_path_env(path: &Path) -> Result<OsString, Error> {
+    let mut paths = Vec::new();
+    paths.push(path.to_owned());
+    if let Some(existing_path) = std::env::var_os("PATH") {
+        paths.extend(std::env::split_paths(&existing_path));
+    }
+    Ok(std::env::join_paths(paths)?)
+}
+
 #[derive(Copy, Clone, Debug)]
 enum ArchiveFormat {
     TarGz,

rye/src/uv.rs

@@ -272,6 +272,13 @@ impl Uv {
         }
     }
 
+    /// Get uv binary path
+    ///
+    /// Warning: Always use self.cmd() when at all possible
+    pub fn uv_bin(&self) -> &Path {
+        &self.uv_bin
+    }
+
     fn create_venv(
         &self,
         venv_dir: &Path,