From 376c19e06bedf54c8a897068f25ff7b9a8e75198 Mon Sep 17 00:00:00 2001
From: Filip Dutescu
Date: Mon, 6 Mar 2023 11:19:53 +0200
Subject: 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>---
 helix-term/src/commands.rs       |  1 +
 helix-term/src/commands/dap.rs   | 30 ++++++++++++++++++++++++++++++
 helix-term/src/keymap/default.rs |  1 +
 3 files changed, 32 insertions(+)

(limited to 'helix-term/src')

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index cd7626eb..c76e9f2b 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -430,6 +430,7 @@ impl MappableCommand {
         goto_next_paragraph, "Goto next paragraph",
         goto_prev_paragraph, "Goto previous paragraph",
         dap_launch, "Launch debug target",
+        dap_restart, "Restart debugging session",
         dap_toggle_breakpoint, "Toggle breakpoint",
         dap_continue, "Continue program execution",
         dap_pause, "Pause program execution",
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,
diff --git a/helix-term/src/keymap/default.rs b/helix-term/src/keymap/default.rs
index 7425c815..9bd00280 100644
--- a/helix-term/src/keymap/default.rs
+++ b/helix-term/src/keymap/default.rs
@@ -223,6 +223,7 @@ pub fn default() -> HashMap<Mode, Keymap> {
             "'" => last_picker,
             "g" => { "Debug (experimental)" sticky=true
                 "l" => dap_launch,
+                "r" => dap_restart,
                 "b" => dap_toggle_breakpoint,
                 "c" => dap_continue,
                 "h" => dap_pause,
-- 
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