Reconnect button for remote projects (#12669)

Release Notes:

- N/A

---------

Co-authored-by: Max <max@zed.dev>

crates/project/src/project.rs

@@ -1816,6 +1816,9 @@ impl Project {
     }
 
     pub fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
+        if self.is_disconnected() {
+            return;
+        }
         self.disconnected_from_host_internal(cx);
         cx.emit(Event::DisconnectedFromHost);
         cx.notify();
@@ -1863,7 +1866,10 @@ impl Project {
             for open_buffer in self.opened_buffers.values_mut() {
                 // Wake up any tasks waiting for peers' edits to this buffer.
                 if let Some(buffer) = open_buffer.upgrade() {
-                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
+                    buffer.update(cx, |buffer, cx| {
+                        buffer.give_up_waiting();
+                        buffer.set_capability(Capability::ReadOnly, cx)
+                    });
                 }
 
                 if let OpenBuffer::Strong(buffer) = open_buffer {
@@ -2127,6 +2133,9 @@ impl Project {
         let remote_worktree_id = worktree.read(cx).id();
         let path = path.clone();
         let path_string = path.to_string_lossy().to_string();
+        if self.is_disconnected() {
+            return Task::ready(Err(anyhow!(ErrorCode::Disconnected)));
+        }
         cx.spawn(move |this, mut cx| async move {
             let response = rpc
                 .request(proto::OpenBufferByPath {

crates/project/src/terminals.rs

@@ -337,22 +337,10 @@ fn prepare_ssh_shell(
         "exec $SHELL -l".to_string()
     };
 
-    let (port_forward, local_dev_env) =
-        if env::var("ZED_RPC_URL").as_deref() == Ok("http://localhost:8080/rpc") {
-            (
-                "-R 8080:localhost:8080",
-                "export ZED_RPC_URL=http://localhost:8080/rpc;",
-            )
-        } else {
-            ("", "")
-        };
-
     let commands = if let Some(path) = path {
-        // I've found that `ssh -t dev sh -c 'cd; cd /tmp; pwd'` gives /tmp
-        // but `ssh -t dev sh -c 'cd /tmp; pwd'` gives /root
-        format!("cd {path}; {local_dev_env} {to_run}")
+        format!("cd {path}; {to_run}")
     } else {
-        format!("cd; {local_dev_env} {to_run}")
+        format!("cd; {to_run}")
     };
     let shell_invocation = &format!("sh -c {}", shlex::try_quote(&commands)?);
 
@@ -361,10 +349,9 @@ fn prepare_ssh_shell(
     // be run instead.
     write!(
         &mut ssh_file,
-        "#!/bin/sh\nexec {} \"$@\" {} {} {}",
+        "#!/bin/sh\nexec {} \"$@\" {} {}",
         real_ssh.to_string_lossy(),
         if spawn_task.is_none() { "-t" } else { "" },
-        port_forward,
         shlex::try_quote(shell_invocation)?,
     )?;