feat(dap): implement Restart request (#5651)

Add a restart debug session command, which would issue a
[Restart Request][1], if the debugger supports it and a session is
running. It uses the same arguments and requests used to start the
initial session, when recreating it.

It builds upon #5532, making use of the changes to the termination
workflow of a session.

[1]: https://microsoft.github.io/debug-adapter-protocol/specification#Requests_Restart

Closes: #5594

Signed-off-by: Filip Dutescu <filip.dutescu@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/helix-term/src/commands/dap.rs b/helix-term/src/commands/dap.rs
index 023ed377..dac1e9d5 100644
--- a/helix-term/src/commands/dap.rs
+++ b/helix-term/src/commands/dap.rs
@@ -289,6 +289,36 @@ pub fn dap_launch(cx: &mut Context) {
     ))));
 }
 
+pub fn dap_restart(cx: &mut Context) {
+    let debugger = match &cx.editor.debugger {
+        Some(debugger) => debugger,
+        None => {
+            cx.editor.set_error("Debugger is not running");
+            return;
+        }
+    };
+    if !debugger
+        .capabilities()
+        .supports_restart_request
+        .unwrap_or(false)
+    {
+        cx.editor
+            .set_error("Debugger does not support session restarts");
+        return;
+    }
+    if debugger.starting_request_args().is_none() {
+        cx.editor
+            .set_error("No arguments found with which to restart the sessions");
+        return;
+    }
+
+    dap_callback(
+        cx.jobs,
+        debugger.restart(),
+        |editor, _compositor, _resp: ()| editor.set_status("Debugging session restarted"),
+    );
+}
+
 fn debug_parameter_prompt(
     completions: Vec<DebugConfigCompletion>,
     config_name: String,