Implement uninstall command

HACKING.md

@@ -87,3 +87,9 @@ There are two important reasons for this:
 By default, driver starts RPC server at `127.0.0.1:9712`.
 
 If you want to change this address, you can edit `DriverSocket` key in `/Library/Audio/Plug-Ins/HAL/roc_vad.driver/Contents/Info.plist` plist file. Both driver and command-line tool read socket address from that file.
+
+You may need to regenerate driver signature after changing that file:
+
+```
+$ sudo codesign --force -s <CODESIGN_ID> /Library/Audio/Plug-Ins/HAL/roc_vad.driver
+```

README.md

@@ -38,7 +38,25 @@ Compatible Roc Toolkit senders and receivers include:
 * [C library](https://roc-streaming.org/toolkit/docs/api.html) and [bindings for other languages](https://roc-streaming.org/toolkit/docs/api/bindings.html) (Go, Java)
 * [Android app](https://github.com/roc-streaming/roc-droid)
 
-## Installation
+## Install from binaries
+
+Install driver and command-line tool:
+
+```
+$ TODO
+```
+
+Then reboot your Mac.
+
+To **uninstall** everything, run:
+
+```
+$ sudo roc-vad uninstall
+```
+
+Then reboot your Mac.
+
+## Install from sources
 
 Prerequisites:
 
@@ -129,7 +147,7 @@ $ roc-vad logcat
 ...
 ```
 
-Alternatively, use `syslog` makefile target. It streams logs that driver sends to system log. Basically they are the same logs as produced by `logcat` command, but in other format:
+Alternatively, you can use `syslog` makefile target. It streams logs that driver sends to system log. Basically they are the same logs as produced by `logcat` command, but in slightly different format, and possibly truncated and deduplicated:
 
 ```
 $ make syslog

common/build_info.cpp.in

@@ -21,4 +21,7 @@ const char* BuildInfo::driver_bundle_path =
 const char* BuildInfo::driver_uuid = "${DRIVER_UUID}";
 const char* BuildInfo::driver_socket = "${DRIVER_SOCKET}";
 
+const char* BuildInfo::tool_name = "${TOOL_NAME}";
+const char* BuildInfo::tool_path = "/usr/local/bin/${TOOL_NAME}";
+
 } // namespace rocvad

common/build_info.hpp

@@ -21,6 +21,9 @@ struct BuildInfo
     static const char* driver_bundle_path;
     static const char* driver_uuid;
     static const char* driver_socket;
+
+    static const char* tool_name;
+    static const char* tool_path;
 };
 
 } // namespace rocvad

tool/CMakeLists.txt

@@ -16,6 +16,7 @@ add_executable(${TOOL_NAME}
   "cmd_info.cpp"
   "cmd_logcat.cpp"
   "cmd_root.cpp"
+  "cmd_uninstall.cpp"
   "connector.cpp"
   "main.cpp"
   "parse.cpp"

tool/cmd_root.cpp

@@ -10,6 +10,7 @@
 #include "cmd_device.hpp"
 #include "cmd_info.hpp"
 #include "cmd_logcat.hpp"
+#include "cmd_uninstall.hpp"
 
 using namespace rocvad;
 
@@ -20,4 +21,5 @@ CmdRoot::CmdRoot(CLI::App& parent)
     register_subcommand(std::make_shared<CmdInfo>(parent));
     register_subcommand(std::make_shared<CmdLogcat>(parent));
     register_subcommand(std::make_shared<CmdDevice>(parent));
+    register_subcommand(std::make_shared<CmdUninstall>(parent));
 }

tool/cmd_uninstall.cpp

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) Roc Streaming authors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "cmd_uninstall.hpp"
+#include "build_info.hpp"
+
+#include <fmt/core.h>
+#include <spdlog/spdlog.h>
+
+#include <unistd.h>
+#include <filesystem>
+
+using namespace rocvad;
+
+CmdUninstall::CmdUninstall(CLI::App& parent)
+{
+    register_command(parent.add_subcommand("uninstall", "uninstall driver and tool"));
+}
+
+bool CmdUninstall::execute(const Environment& env)
+{
+    if (geteuid() != 0) {
+        spdlog::error("should be run with root privileges\ntry \"sudo {} uninstall\"",
+            BuildInfo::tool_name);
+        return false;
+    }
+
+    int n_ok = 0, n_warn = 0, n_err = 0;
+
+    for (auto path : {BuildInfo::driver_bundle_path, BuildInfo::tool_path}) {
+        std::error_code err;
+        const auto n_removed = std::filesystem::remove_all(path, err);
+
+        if (n_removed != 0 && !err) {
+            fmt::println("removed {}", path);
+            n_ok++;
+        } else if (n_removed == 0 && !err) {
+            spdlog::warn("can't remove \"{}\": Not found", path);
+            n_warn++;
+        } else if (err) {
+            spdlog::error("can't remove \"{}\": {}", path, err.message());
+            n_err++;
+        }
+    }
+
+    if (n_ok == 0) {
+        fmt::println("nothing removed");
+    } else if (n_err == 0) {
+        fmt::println("everything removed");
+    } else {
+        fmt::println("completed with errors");
+    }
+
+    return (n_err == 0);
+}

tool/cmd_uninstall.hpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) Roc Streaming authors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "cmd_base.hpp"
+
+namespace rocvad {
+
+class CmdUninstall : public CmdBase
+{
+public:
+    CmdUninstall(CLI::App& parent);
+
+    bool execute(const Environment& env) override;
+};
+
+} // namespace rocvad