Fix leaked zombie processes when closing surfaces

src/config/Config.zig

@@ -22,7 +22,6 @@ const inputpkg = @import("../input.zig");
 const terminal = @import("../terminal/main.zig");
 const internal_os = @import("../os/main.zig");
 const cli = @import("../cli.zig");
-const Command = @import("../Command.zig");
 
 const conditional = @import("conditional.zig");
 const Conditional = conditional.Conditional;

src/termio/Exec.zig

@@ -1196,9 +1196,13 @@ const Subprocess = struct {
         try self.pty.?.childPreExec();
     }
 
-    /// Called to notify that we exited externally so we can unset our
-    /// running state.
+    /// Called to notify that we exited externally so we can call wait on the
+    /// process and unset our running state.
     pub fn externalExit(self: *Subprocess) void {
+        if (self.command) |*cmd| {
+            _ = cmd.wait(false) catch |err|
+                log.err("error waiting on subprocess: {}", .{err});
+        }
         self.command = null;
     }
 

src/termio/Options.zig

@@ -4,7 +4,6 @@ const builtin = @import("builtin");
 const xev = @import("xev");
 const apprt = @import("../apprt.zig");
 const renderer = @import("../renderer.zig");
-const Command = @import("../Command.zig");
 const Config = @import("../config.zig").Config;
 const termio = @import("../termio.zig");
 

src/termio/backend.zig

@@ -11,7 +11,6 @@ const renderer = @import("../renderer.zig");
 const shell_integration = @import("shell_integration.zig");
 const terminal = @import("../terminal/main.zig");
 const termio = @import("../termio.zig");
-const Command = @import("../Command.zig");
 const Pty = @import("../pty.zig").Pty;
 
 // The preallocation size for the write request pool. This should be big