SSH remoting: terminal & tasks (#15321)

This also rolls back the `TerminalWorkDir` abstraction I added for the
original remoting, and tidies up the terminal creation code to be clear
about whether we're creating a task *or* a terminal. The previous logic
was a little muddy because it assumed we could be doing both at the same
time (which was not true).

Release Notes:

- remoting alpha: Removed the ability to specify `gh cs ssh` or `gcloud
compute ssh` etc. See https://zed.dev/docs/remote-development for
alternatives.
- remoting alpha: Added support for terminal and tasks to new
experimental ssh remoting

crates/task/src/lib.rs

@@ -9,9 +9,9 @@ use collections::{hash_map, HashMap, HashSet};
 use gpui::SharedString;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
+use std::borrow::Cow;
 use std::path::PathBuf;
 use std::str::FromStr;
-use std::{borrow::Cow, path::Path};
 
 pub use task_template::{HideStrategy, RevealStrategy, TaskTemplate, TaskTemplates};
 pub use vscode_format::VsCodeTaskFile;
@@ -21,38 +21,6 @@ pub use vscode_format::VsCodeTaskFile;
 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Deserialize)]
 pub struct TaskId(pub String);
 
-/// TerminalWorkDir describes where a task should be run
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum TerminalWorkDir {
-    /// Local is on this machine
-    Local(PathBuf),
-    /// SSH runs the terminal over ssh
-    Ssh {
-        /// The command to run to connect
-        ssh_command: String,
-        /// The path on the remote server
-        path: Option<String>,
-    },
-}
-
-impl TerminalWorkDir {
-    /// Returns whether the terminal task is supposed to be spawned on a local machine or not.
-    pub fn is_local(&self) -> bool {
-        match self {
-            Self::Local(_) => true,
-            Self::Ssh { .. } => false,
-        }
-    }
-
-    /// Returns a local CWD if the terminal is local, None otherwise.
-    pub fn local_path(&self) -> Option<&Path> {
-        match self {
-            Self::Local(path) => Some(path),
-            Self::Ssh { .. } => None,
-        }
-    }
-}
-
 /// Contains all information needed by Zed to spawn a new terminal tab for the given task.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct SpawnInTerminal {
@@ -70,7 +38,7 @@ pub struct SpawnInTerminal {
     /// A human-readable label, containing command and all of its arguments, joined and substituted.
     pub command_label: String,
     /// Current working directory to spawn the command into.
-    pub cwd: Option<TerminalWorkDir>,
+    pub cwd: Option<PathBuf>,
     /// Env overrides for the command, will be appended to the terminal's environment from the settings.
     pub env: HashMap<String, String>,
     /// Whether to use a new terminal tab or reuse the existing one to spawn the process.
@@ -265,7 +233,7 @@ impl IntoIterator for TaskVariables {
 
 /// Keeps track of the file associated with a task and context of tasks execution (i.e. current file or current function).
 /// Keeps all Zed-related state inside, used to produce a resolved task out of its template.
-#[derive(Clone, Debug, Default, PartialEq, Eq, Serialize)]
+#[derive(Clone, Debug, Default, PartialEq, Eq)]
 pub struct TaskContext {
     /// A path to a directory in which the task should be executed.
     pub cwd: Option<PathBuf>,