[feat] add in-app updates for desktop installations

2026-10-28 00:33:06 +08:00 · 2026-10-20 20:11:12 +08:00
parent 62ba3693af
commit a625890b28
34 changed files with 1732 additions and 25 deletions
@@ -0,0 +1,54 @@
+#include "updater/update_platform.h"
+
+#include <unistd.h>
+#include <sys/stat.h>
+#include <chrono>
+#include <cstdlib>
+#include <fstream>
+#include <stdexcept>
+#include <thread>
+
+namespace crossdesk::updater {
+fs::path ExecutablePath() { return fs::read_symlink("/proc/self/exe"); }
+bool SupportedInstallation(const fs::path& application) {
+  return application == fs::path("/usr/lib/crossdesk/crossdesk-bin") &&
+         !PlatformKey(application).empty() && fs::is_regular_file(HelperPath(application)) &&
+         access("/usr/bin/pkexec", X_OK) == 0 && access("/usr/bin/apt-get", X_OK) == 0;
+}
+int RunElevated(const fs::path& executable, const fs::path& job) {
+  return Run("/usr/bin/pkexec", {executable.string(), "--install", job.string()});
+}
+void WaitForApplicationExit(const fs::path& application) {
+  const auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(45);
+  do {
+    bool running = false;
+    for (const auto& entry : fs::directory_iterator("/proc")) {
+      const auto name = entry.path().filename().string();
+      if (name.empty() || name.find_first_not_of("0123456789") != std::string::npos) continue;
+      std::error_code error;
+      const auto executable = fs::read_symlink(entry.path() / "exe", error);
+      if (!error && executable == application) running = true;
+      // Fail closed when a matching process cannot be inspected. A disappeared
+      // process has no comm file and does not block installation.
+      if (error) {
+        std::ifstream comm(entry.path() / "comm");
+        std::string process_name;
+        std::getline(comm, process_name);
+        if (process_name == "crossdesk-bin") running = true;
+      }
+    }
+    if (!running) return;
+    std::this_thread::sleep_for(std::chrono::milliseconds(200));
+  } while (std::chrono::steady_clock::now() < deadline);
+  throw std::runtime_error("CrossDesk is still running; stop other sessions or its supervisor and retry");
+}
+void InstallPackage(const fs::path& package, const fs::path&) {
+  // No shell and no automatic dependency removal. apt owns dpkg locking and
+  // dependency resolution; a busy/broken package manager is reported as failure.
+  setenv("DEBIAN_FRONTEND", "noninteractive", 1);
+  if (Run("/usr/bin/apt-get", {"install", "--yes", "--no-remove",
+                              "-o", "Dpkg::Options::=--force-confold", package.string()}) != 0)
+    throw std::runtime_error("The package manager could not install the update");
+}
+void Restart(const fs::path&) { Launch("/usr/bin/crossdesk", {}); }
+}  // namespace crossdesk::updater