From bbb1d3f85acd42be8a666576a4696a9c27c64120 Mon Sep 17 00:00:00 2001
From: Zanie Blue <contact@zanie.dev>
Date: Mon, 23 Sep 2024 14:08:59 -0500
Subject: [PATCH] Determine if pre-release Python downloads should be allowed
 using the version specifiers (#7638)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Closes #7637

```
❯ uv python install '>=3.11'
Installed Python 3.12.6 in 1.70s
 + cpython-3.12.6-macos-aarch64-none

❯ uv python install 3.13
Installed Python 3.13.0rc2 in 1.89s
 + cpython-3.13.0rc2-macos-aarch64-none

❯ uv python uninstall --all
Searching for Python installations
Uninstalled 2 versions in 94ms
 - cpython-3.12.6-macos-aarch64-none
 - cpython-3.13.0rc2-macos-aarch64-none

❯ uv python install '>=3.11a1'
Installed Python 3.13.0rc2 in 1.89s
 + cpython-3.13.0rc2-macos-aarch64-none
```
---
 crates/uv-python/src/downloads.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/uv-python/src/downloads.rs b/crates/uv-python/src/downloads.rs
index 6b8f4565f103..b9ba039edded 100644
--- a/crates/uv-python/src/downloads.rs
+++ b/crates/uv-python/src/downloads.rs
@@ -278,7 +278,11 @@ impl PythonDownloadRequest {
     }
 
     pub fn allows_prereleases(&self) -> bool {
-        self.prereleases.unwrap_or_else(|| self.version.is_some())
+        self.prereleases.unwrap_or_else(|| {
+            self.version
+                .as_ref()
+                .is_some_and(VersionRequest::allows_prereleases)
+        })
     }
 
     pub fn satisfied_by_interpreter(&self, interpreter: &Interpreter) -> bool {