fix: send sigterm to languages servers on exit

Not all language servers willingly exit if we just close stdin. Eventually
we will follow the protocol's shutdown process, but for now we just send a
sigterm.

build.zig.zon

@@ -20,8 +20,8 @@
             .hash = "1220a7cf5f59b61257993bc5b02991ffc523d103f66842fa8d8ab5c9fdba52799340",
         },
         .thespian = .{
-            .url = "https://github.com/neurocyte/thespian/archive/7d441d3bcfaee66b313a333d440deac2e26f8c2a.tar.gz",
+            .url = "https://github.com/neurocyte/thespian/archive/9be51bb18aae4ff43ffcac649d540a7b4441e4b8.tar.gz",
-            .hash = "12206c348bbfb59dcbef2dd3ee5728ad9e26ae925d664eb82cd47b40d91fe6c7a063",
+            .hash = "1220b78192e49c81dde3d0810985e54be703a192fc5185d2da56929baea0b5186e74",
         },
         .themes = .{
             .url = "https://github.com/neurocyte/flow-themes/releases/download/master-69be8cd05fddcbc2a3ca2dec4abe6b8d07ed65b1/flow-themes.tar.gz",

src/LSP.zig

@@ -22,6 +22,11 @@ pub fn deinit(self: *Self) void {
     self.pid.deinit();
 }
 
+pub fn term(self: *Self) void {
+    self.pid.send(.{"term"}) catch {};
+    self.pid.deinit();
+}
+
 pub fn send_request(self: Self, a: std.mem.Allocator, method: []const u8, m: anytype) error{Exit}!tp.message {
     // const frame = tracy.initZone(@src(), .{ .name = module_name ++ ".send_request" });
     // defer frame.deinit();
@@ -107,6 +112,14 @@ const Process = struct {
         }
     }
 
+    fn term(self: *Process) tp.result {
+        if (self.sp) |*sp| {
+            defer self.sp = null;
+            try sp.term();
+            self.write_log("### terminated ###\n", .{});
+        }
+    }
+
     fn start(self: *Process) tp.result {
         const frame = tracy.initZone(@src(), .{ .name = module_name ++ " start" });
         defer frame.deinit();
@@ -137,6 +150,9 @@ const Process = struct {
         } else if (try m.match(.{"close"})) {
             self.write_log("### LSP close ###\n", .{});
             try self.close();
+        } else if (try m.match(.{"term"})) {
+            self.write_log("### LSP terminated ###\n", .{});
+            try self.term();
         } else if (try m.match(.{ self.sp_tag, "stdout", tp.extract(&bytes) })) {
             self.handle_output(bytes) catch |e| return tp.exit_error(e);
         } else if (try m.match(.{ self.sp_tag, "term", tp.extract(&err), tp.extract(&code) })) {

src/Project.zig

@@ -45,7 +45,7 @@ pub fn deinit(self: *Self) void {
     var i = self.language_servers.iterator();
     while (i.next()) |p| {
         self.a.free(p.key_ptr.*);
-        p.value_ptr.*.deinit();
+        p.value_ptr.*.term();
     }
     for (self.files.items) |file| self.a.free(file.path);
     self.files.deinit();