Always show lock updates in uv lock (#5413)

## Summary

Closes https://github.com/astral-sh/uv/issues/5412.

crates/uv/src/commands/project/add.rs

@@ -244,7 +244,7 @@ pub(crate) async fn add(
     project::sync::do_sync(
         &VirtualProject::Project(project),
         &venv,
-        &lock,
+        &lock.lock,
         &extras,
         dev,
         Modifications::Sufficient,

crates/uv/src/commands/project/lock.rs

@@ -32,6 +32,15 @@ use crate::commands::{pip, ExitStatus};
 use crate::printer::Printer;
 use crate::settings::{ResolverSettings, ResolverSettingsRef};
 
+/// The result of running a lock operation.
+#[derive(Debug, Clone)]
+pub(crate) struct LockResult {
+    /// The previous lock, if any.
+    pub(crate) previous: Option<Lock>,
+    /// The updated lock.
+    pub(crate) lock: Lock,
+}
+
 /// Resolve the project requirements into a lockfile.
 pub(crate) async fn lock(
     locked: bool,
@@ -86,7 +95,12 @@ pub(crate) async fn lock(
     )
     .await
     {
-        Ok(_) => Ok(ExitStatus::Success),
+        Ok(lock) => {
+            if let Some(previous) = lock.previous.as_ref() {
+                report_upgrades(previous, &lock.lock, printer)?;
+            }
+            Ok(ExitStatus::Success)
+        }
         Err(ProjectError::Operation(pip::operations::Error::Resolve(
             uv_resolver::ResolveError::NoSolution(err),
         ))) => {
@@ -112,12 +126,16 @@ pub(super) async fn do_safe_lock(
     native_tls: bool,
     cache: &Cache,
     printer: Printer,
-) -> Result<Lock, ProjectError> {
+) -> Result<LockResult, ProjectError> {
     if frozen {
         // Read the existing lockfile, but don't attempt to lock the project.
-        read(workspace)
+        let existing = read(workspace)
             .await?
-            .ok_or_else(|| ProjectError::MissingLockfile)
+            .ok_or_else(|| ProjectError::MissingLockfile)?;
+        Ok(LockResult {
+            previous: None,
+            lock: existing,
+        })
     } else if locked {
         // Read the existing lockfile.
         let existing = read(workspace)
@@ -145,7 +163,10 @@ pub(super) async fn do_safe_lock(
             return Err(ProjectError::LockMismatch);
         }
 
-        Ok(lock)
+        Ok(LockResult {
+            previous: Some(existing),
+            lock,
+        })
     } else {
         // Read the existing lockfile.
         let existing = read(workspace).await?;
@@ -166,16 +187,19 @@ pub(super) async fn do_safe_lock(
         )
         .await?;
 
-        if !existing.is_some_and(|existing| existing == lock) {
+        if !existing.as_ref().is_some_and(|existing| *existing == lock) {
             commit(&lock, workspace).await?;
         }
 
-        Ok(lock)
+        Ok(LockResult {
+            previous: existing,
+            lock,
+        })
     }
 }
 
 /// Lock the project requirements into a lockfile.
-pub(super) async fn do_lock(
+async fn do_lock(
     workspace: &Workspace,
     interpreter: &Interpreter,
     existing_lock: Option<&Lock>,
@@ -506,16 +530,7 @@ pub(super) async fn do_lock(
     // Notify the user of any resolution diagnostics.
     pip::operations::diagnose_resolution(resolution.diagnostics(), printer)?;
 
-    let new_lock = Lock::from_resolution_graph(&resolution)?;
-
-    // Notify the user of any dependency updates
-    if !upgrade.is_none() {
-        if let Some(existing_lock) = existing_lock {
-            report_upgrades(existing_lock, &new_lock, printer)?;
-        }
-    }
-
-    Ok(new_lock)
+    Ok(Lock::from_resolution_graph(&resolution)?)
 }
 
 /// Write the lockfile to disk.

crates/uv/src/commands/project/remove.rs

@@ -131,7 +131,7 @@ pub(crate) async fn remove(
     project::sync::do_sync(
         &VirtualProject::Project(project),
         &venv,
-        &lock,
+        &lock.lock,
         &extras,
         dev,
         Modifications::Exact,

crates/uv/src/commands/project/run.rs

@@ -238,7 +238,7 @@ pub(crate) async fn run(
             project::sync::do_sync(
                 &project,
                 &venv,
-                &lock,
+                &lock.lock,
                 &extras,
                 dev,
                 Modifications::Sufficient,

crates/uv/src/commands/project/sync.rs

@@ -95,7 +95,7 @@ pub(crate) async fn sync(
     do_sync(
         &project,
         &venv,
-        &lock,
+        &lock.lock,
         &extras,
         dev,
         modifications,

crates/uv/src/commands/project/tree.rs

@@ -83,7 +83,7 @@ pub(crate) async fn tree(
 
     // Read packages from the lockfile.
     let mut packages: IndexMap<_, Vec<_>> = IndexMap::new();
-    for dist in lock.into_distributions() {
+    for dist in lock.lock.into_distributions() {
         let name = dist.name().clone();
         let metadata = dist.to_metadata(workspace.install_path())?;
         packages.entry(name).or_default().push(metadata);

crates/uv/tests/lock.rs

@@ -3569,23 +3569,23 @@ fn lock_new_extras() -> Result<()> {
     "#,
     )?;
 
-    deterministic! { context =>
-        uv_snapshot!(context.filters(), context.lock().arg("--preview"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--preview"), @r###"
         success: true
         exit_code: 0
         ----- stdout -----
 
         ----- stderr -----
         Resolved 7 packages in [TIME]
+        Added pysocks v1.7.1
         "###);
 
-        let lock = fs_err::read_to_string(context.temp_dir.join("uv.lock")).unwrap();
+    let lock = fs_err::read_to_string(context.temp_dir.join("uv.lock")).unwrap();
 
-        insta::with_settings!({
-            filters => context.filters(),
-        }, {
-            assert_snapshot!(
-                lock, @r###"
+    insta::with_settings!({
+        filters => context.filters(),
+    }, {
+        assert_snapshot!(
+            lock, @r###"
             version = 1
             requires-python = ">=3.12"
             exclude-newer = "2024-03-25 00:00:00 UTC"
@@ -3678,9 +3678,8 @@ fn lock_new_extras() -> Result<()> {
                 { url = "https://files.pythonhosted.org/packages/a2/73/a68704750a7679d0b6d3ad7aa8d4da8e14e151ae82e6fee774e6e0d05ec8/urllib3-2.2.1-py3-none-any.whl", hash = "sha256:450b20ec296a467077128bff42b73080516e71b56ff59a60a02bef2232c4fa9d", size = 121067 },
             ]
             "###
-            );
-        });
-    }
+        );
+    });
 
     Ok(())
 }
@@ -3863,14 +3862,15 @@ fn lock_resolution_mode() -> Result<()> {
 
     // Locking with `lowest-direct` should ignore the existing lockfile.
     uv_snapshot!(context.filters(), context.lock().arg("--resolution").arg("lowest-direct"), @r###"
-        success: true
-        exit_code: 0
-        ----- stdout -----
+    success: true
+    exit_code: 0
+    ----- stdout -----
 
-        ----- stderr -----
-        warning: `uv lock` is experimental and may change without warning
-        Ignoring existing lockfile due to change in resolution mode: `highest` vs. `lowest-direct`
-        Resolved 4 packages in [TIME]
+    ----- stderr -----
+    warning: `uv lock` is experimental and may change without warning
+    Ignoring existing lockfile due to change in resolution mode: `highest` vs. `lowest-direct`
+    Resolved 4 packages in [TIME]
+    Updated anyio v4.3.0 -> v3.0.0
     "###);
 
     let lock = fs_err::read_to_string(context.temp_dir.join("uv.lock")).unwrap();