Include pre-release Python versions in uv python list (#7290)

Follows https://github.com/astral-sh/uv/pull/7278

Closes https://github.com/astral-sh/uv/issues/7280

`uv python list` should show installed pre-release versions, even though
we don't select them by default (as defined by #7300 and
https://github.com/astral-sh/uv/pull/7278)

crates/uv-python/src/downloads.rs

@@ -96,6 +96,10 @@ pub struct PythonDownloadRequest {
     arch: Option<Arch>,
     os: Option<Os>,
     libc: Option<Libc>,
+
+    /// Whether to allow pre-releases or not. If not set, defaults to true if [`Self::version`] is
+    /// not None, and false otherwise.
+    prereleases: Option<bool>,
 }
 
 impl PythonDownloadRequest {
@@ -105,6 +109,7 @@ impl PythonDownloadRequest {
         arch: Option<Arch>,
         os: Option<Os>,
         libc: Option<Libc>,
+        prereleases: Option<bool>,
     ) -> Self {
         Self {
             version,
@@ -112,6 +117,7 @@ impl PythonDownloadRequest {
             arch,
             os,
             libc,
+            prereleases,
         }
     }
 
@@ -145,6 +151,12 @@ impl PythonDownloadRequest {
         self
     }
 
+    #[must_use]
+    pub fn with_prereleases(mut self, prereleases: bool) -> Self {
+        self.prereleases = Some(prereleases);
+        self
+    }
+
     /// Construct a new [`PythonDownloadRequest`] from a [`PythonRequest`] if possible.
     ///
     /// Returns [`None`] if the request kind is not compatible with a download, e.g., it is
@@ -196,6 +208,7 @@ impl PythonDownloadRequest {
             Some(Arch::from_env()),
             Some(Os::from_env()),
             Some(Libc::from_env()?),
+            None,
         ))
     }
 
@@ -252,20 +265,22 @@ impl PythonDownloadRequest {
                 return false;
             }
         }
+        // If we don't allow pre-releases, don't match a key with a pre-release tag
+        if !self.allows_prereleases() && !key.prerelease.is_empty() {
+            return false;
+        }
         true
     }
 
     /// Whether this request is satisfied by a Python download.
-    ///
-    /// Note that unlike [`Self::satisfied_by_key`], this method will not match a pre-release
-    /// unless a version is included in the request.
     pub fn satisfied_by_download(&self, download: &ManagedPythonDownload) -> bool {
-        if self.version.is_none() && !download.key().prerelease.is_empty() {
-            return false;
-        }
         self.satisfied_by_key(download.key())
     }
 
+    pub fn allows_prereleases(&self) -> bool {
+        self.prereleases.unwrap_or_else(|| self.version.is_some())
+    }
+
     pub fn satisfied_by_interpreter(&self, interpreter: &Interpreter) -> bool {
         if let Some(version) = self.version() {
             if !version.matches_interpreter(interpreter) {
@@ -375,7 +390,7 @@ impl FromStr for PythonDownloadRequest {
 
             return Err(Error::TooManyParts(s.to_string()));
         }
-        Ok(Self::new(version, implementation, arch, os, libc))
+        Ok(Self::new(version, implementation, arch, os, libc, None))
     }
 }
 

crates/uv/src/commands/python/list.rs

@@ -50,7 +50,9 @@ pub(crate) async fn list(
                     None
                 }
             }
-        };
+        }
+        // Include pre-release versions
+        .map(|request| request.with_prereleases(true));
 
         let downloads = download_request
             .as_ref()

crates/uv/src/commands/python/uninstall.rs

@@ -75,6 +75,8 @@ async fn do_uninstall(
                 anyhow::anyhow!("Cannot uninstall managed Python for request: {request}")
             })
         })
+        // Always include pre-releases in uninstalls
+        .map(|result| result.map(|request| request.with_prereleases(true)))
         .collect::<Result<Vec<_>>>()?;
 
     let installed_installations: Vec<_> = installations.find_all()?.collect();