Fix non-Windows systems (#113)

docs/changelog.md

@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## Unreleased
 
+***Fixed:***
+
+- Fix UV and the `VIRTUAL_ENV` environment variable on non-Windows systems
+
 ## 0.18.0 - 2024-04-22
 
 ***Added:***

src/compression.rs

@@ -1,11 +1,15 @@
 use std::fs::File;
-use std::path::PathBuf;
+use std::path::Path;
 
 use anyhow::{bail, Result};
 
 use crate::terminal;
 
-pub fn unpack(format: String, archive: &PathBuf, destination: &PathBuf) -> Result<()> {
+pub fn unpack(
+    format: String,
+    archive: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+) -> Result<()> {
     let wait_message = format!("Unpacking distribution ({})", format);
     match format.as_ref() {
         "tar|bzip2" => unpack_tar_bzip2(archive, destination, wait_message)?,
@@ -18,7 +22,11 @@ pub fn unpack(format: String, archive: &PathBuf, destination: &PathBuf) -> Resul
     Ok(())
 }
 
-fn unpack_tar_bzip2(path: &PathBuf, destination: &PathBuf, wait_message: String) -> Result<()> {
+fn unpack_tar_bzip2(
+    path: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+    wait_message: String,
+) -> Result<()> {
     let bz = bzip2::read::BzDecoder::new(File::open(path)?);
     let mut archive = tar::Archive::new(bz);
 
@@ -30,7 +38,11 @@ fn unpack_tar_bzip2(path: &PathBuf, destination: &PathBuf, wait_message: String)
     Ok(())
 }
 
-pub fn unpack_tar_gzip(path: &PathBuf, destination: &PathBuf, wait_message: String) -> Result<()> {
+pub fn unpack_tar_gzip(
+    path: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+    wait_message: String,
+) -> Result<()> {
     let gz = flate2::read::GzDecoder::new(File::open(path)?);
     let mut archive = tar::Archive::new(gz);
 
@@ -42,7 +54,11 @@ pub fn unpack_tar_gzip(path: &PathBuf, destination: &PathBuf, wait_message: Stri
     Ok(())
 }
 
-fn unpack_tar_zstd(path: &PathBuf, destination: &PathBuf, wait_message: String) -> Result<()> {
+fn unpack_tar_zstd(
+    path: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+    wait_message: String,
+) -> Result<()> {
     let zst = zstd::stream::read::Decoder::new(File::open(path)?)?;
     let mut archive = tar::Archive::new(zst);
 
@@ -54,7 +70,11 @@ fn unpack_tar_zstd(path: &PathBuf, destination: &PathBuf, wait_message: String)
     Ok(())
 }
 
-pub fn unpack_zip(path: &PathBuf, destination: &PathBuf, wait_message: String) -> Result<()> {
+pub fn unpack_zip(
+    path: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+    wait_message: String,
+) -> Result<()> {
     let mut archive = zip::ZipArchive::new(File::open(path)?)?;
 
     let spinner = terminal::spinner(wait_message);

src/distribution.rs

@@ -1,7 +1,8 @@
 use std::env;
+use std::ffi::OsStr;
 use std::fs;
 use std::io::Write;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::process::{exit, Command, ExitStatus};
 
 use anyhow::{bail, Context, Result};
@@ -41,7 +42,7 @@ fn apply_env_vars(command: &mut Command) {
     }
 
     if !app::full_isolation() {
-        command.env("VIRTUAL_ENV", python_dir);
+        command.env("VIRTUAL_ENV", python_dir.parent().unwrap());
     } else if app::uv_as_installer() {
         command.env("UV_SYSTEM_PYTHON", "true");
     }
@@ -59,7 +60,7 @@ fn apply_env_vars(command: &mut Command) {
     }
 }
 
-pub fn python_command(python: &PathBuf) -> Command {
+pub fn python_command(python: &impl AsRef<OsStr>) -> Command {
     let mut command = Command::new(python);
     apply_env_vars(&mut command);
     command.arg(app::python_isolation_flag());
@@ -485,17 +486,33 @@ fn ensure_uv_available() -> Result<()> {
         )
     };
 
-    network::download(
-        &url,
-        &mut f,
-        managed_uv.file_name().unwrap().to_str().unwrap(),
-    )?;
+    network::download(&url, &mut f, "UV")?;
 
     if artifact_name.ends_with(".zip") {
-        compression::unpack_zip(&temp_path, &managed_uv_cache, "Unpacking UV".to_string())
+        compression::unpack_zip(temp_path, dir.path(), "Unpacking UV".to_string())
     } else {
-        compression::unpack_tar_gzip(&temp_path, &managed_uv_cache, "Unpacking UV".to_string())
+        compression::unpack_tar_gzip(temp_path, dir.path(), "Unpacking UV".to_string())
     }
+    .or_else(|err| {
+        bail!("unable to unpack to {}\n{}", dir.path().display(), err);
+    })?;
+
+    let uv_file_name = managed_uv.file_name().unwrap();
+    let mut binary_path = dir.path().join(uv_file_name);
+
+    // Binary is nested in a directory with the same name as the artifact stem
+    if !binary_path.is_file() {
+        binary_path = dir
+            .path()
+            .join(
+                artifact_name
+                    .trim_end_matches(".zip")
+                    .trim_end_matches(".tar.gz"),
+            )
+            .join(uv_file_name);
+    }
+
+    fs_utils::move_temp_file(&binary_path, &managed_uv)
 }
 
 fn run_setup_command(command: Command, message: String) -> Result<(ExitStatus, String)> {