feat(shell) add wait fn to get event from child process

plugins/shell/guest-js/index.ts

@@ -339,6 +339,20 @@ class Child {
       pid: this.pid
     })
   }
+
+    /**
+   * Waits for the child to exit completely, returning the status that it exited with.
+   *
+   * @returns A promise with ExitStatus.
+   *
+   * @since 2.0.2
+   */
+  async wait(): Promise<void> {
+    await invoke('plugin:shell|wait', {
+      cmd: 'waitChild',
+      pid: this.pid
+    })
+  }
 }
 
 interface CommandEvents {

plugins/shell/src/commands.rs

@@ -13,7 +13,7 @@ use tauri::{
 
 use crate::{
     open::Program,
-    process::{CommandEvent, TerminatedPayload},
+    process::{CommandEvent, ExitStatus, TerminatedPayload},
     scope::ExecuteArgs,
     Shell,
 };
@@ -302,6 +302,19 @@ pub fn kill<R: Runtime>(
     Ok(())
 }
 
+#[tauri::command]
+pub async fn wait<R: Runtime>(
+    _window: Window<R>,
+    shell: State<'_, Shell<R>>,
+    pid: ChildId,
+) -> crate::Result<ExitStatus> {
+    if let Some(child) = shell.children.lock().unwrap().get(&pid) {
+        child.wait().await
+    } else {
+        Err(crate::Error::UnknowChildProcess)
+    }
+}
+
 #[tauri::command]
 pub async fn open<R: Runtime>(
     _window: Window<R>,

plugins/shell/src/error.rs

@@ -33,6 +33,8 @@ pub enum Error {
     /// Utf8 error.
     #[error(transparent)]
     Utf8(#[from] std::string::FromUtf8Error),
+    #[error("Child process does'nt exist")]
+    UnknowChildProcess,
 }
 
 impl Serialize for Error {

plugins/shell/src/process/mod.rs

@@ -84,6 +84,14 @@ impl CommandChild {
     pub fn pid(&self) -> u32 {
         self.inner.id()
     }
+
+    /// Waits for the child to exit completely, returning the status that it exited with.
+    pub async fn wait(self) -> crate::Result<ExitStatus> {
+        let exitstatus = self.inner.wait()?;
+        Ok(ExitStatus {
+            code: exitstatus.code(),
+        })
+    }
 }
 
 /// Describes the result of a process after it has terminated.