Add stash apply action

crates/git/src/git.rs

@@ -60,6 +60,8 @@ actions!(
         StashAll,
         /// Pops the most recent stash.
         StashPop,
+        /// Apply the most recent stash.
+        StashApply,
         /// Restores all tracked files to their last committed state.
         RestoreTrackedFiles,
         /// Moves all untracked files to trash.

crates/git/src/repository.rs

@@ -408,6 +408,12 @@ pub trait GitRepository: Send + Sync {
         env: Arc<HashMap<String, String>>,
     ) -> BoxFuture<'_, Result<()>>;
 
+    fn stash_apply(
+        &self,
+        index: Option<usize>,
+        env: Arc<HashMap<String, String>>,
+    ) -> BoxFuture<'_, Result<()>>;
+
     fn stash_drop(
         &self,
         index: Option<usize>,
@@ -1289,6 +1295,35 @@ impl GitRepository for RealGitRepository {
             .boxed()
     }
 
+    fn stash_apply(
+        &self,
+        index: Option<usize>,
+        env: Arc<HashMap<String, String>>,
+    ) -> BoxFuture<'_, Result<()>> {
+        let working_directory = self.working_directory();
+        self.executor
+            .spawn(async move {
+                let mut cmd = new_smol_command("git");
+                let mut args = vec!["stash".to_string(), "apply".to_string()];
+                if let Some(index) = index {
+                    args.push(format!("stash@{{{}}}", index));
+                }
+                cmd.current_dir(&working_directory?)
+                    .envs(env.iter())
+                    .args(args);
+
+                let output = cmd.output().await?;
+
+                anyhow::ensure!(
+                    output.status.success(),
+                    "Failed to apply stash:\n{}",
+                    String::from_utf8_lossy(&output.stderr)
+                );
+                Ok(())
+            })
+            .boxed()
+    }
+
     fn stash_drop(
         &self,
         index: Option<usize>,