Slice 2: tinywl port — kernel compositor runs nested, manages toplevels, touch added

Server contract (pimpl, create/run/dispatch/terminate) over a faithful
tinywl 0.20.1 port: outputs via wlr_scene, xdg-shell toplevels+popups,
focus, interactive move/resize, keyboard/pointer through wlr_cursor — plus
touch (down/up/motion/cancel/frame via seat notifies with per-point origin
tracking), which tinywl lacks. RAII Listener replaces manual wl_list_remove
bookkeeping; shutdown ordering documented in kernel.md. xkbcommon added as
a system dep. Verified: nested under labwc (output WL-1, foot mapped and
focused on GLES2) and a headless+pixman boot test in the kernel suite.

1 files changed, 32 insertions, 7 deletions

diff --git a/packages/host-bin/src/main.cpp b/packages/host-bin/src/main.cpp
index 713186d..eb3892c 100644
--- a/packages/host-bin/src/main.cpp
+++ b/packages/host-bin/src/main.cpp
@@ -1,14 +1,39 @@
 #include <unbox/kernel/kernel.hpp>
+#include <unbox/kernel/server.hpp>
 
 #include <cstdio>
+#include <exception>
+#include <string_view>
 
-auto main() -> int {
-    const bool probe_ok = unbox::kernel::link_probe();
+namespace {
 
-    std::printf("unbox 0.0.1 — kernel skeleton (slice 1)\n");
-    std::printf("  wlroots    %s\n", unbox::kernel::wlroots_version().c_str());
-    std::printf("  RmlUi      %s\n", unbox::kernel::rmlui_version().c_str());
-    std::printf("  link probe %s\n", probe_ok ? "ok" : "FAILED");
+void print_usage(const char* argv0) {
+    std::printf("usage: %s [-s <startup command>]\n", argv0);
+}
+
+} // namespace
+
+auto main(int argc, char* argv[]) -> int {
+    unbox::kernel::Server::Options options;
+    for (int i = 1; i < argc; ++i) {
+        const std::string_view arg = argv[i];
+        if (arg == "-s" && i + 1 < argc) {
+            options.startup_cmd = argv[++i];
+        } else {
+            print_usage(argv[0]);
+            return arg == "-h" ? 0 : 1;
+        }
+    }
 
-    return probe_ok ? 0 : 1;
+    try {
+        auto server = unbox::kernel::Server::create(std::move(options));
+        std::printf("unbox 0.0.1 (wlroots %s, RmlUi %s) on WAYLAND_DISPLAY=%s\n",
+                    unbox::kernel::wlroots_version().c_str(),
+                    unbox::kernel::rmlui_version().c_str(), server->socket_name().c_str());
+        server->run();
+    } catch (const std::exception& e) {
+        std::fprintf(stderr, "unbox: fatal: %s\n", e.what());
+        return 1;
+    }
+    return 0;
 }