From 58e0e48d5968209fde7d53d4f338b625f2a3e66a Mon Sep 17 00:00:00 2001
From: Dingxuan Jiang <30750959+xezzon@users.noreply.github.com>
Date: Mon, 19 Aug 2024 12:25:36 +0800
Subject: [PATCH] easytier-gui: prevent multiple instances (#265)

* easytier-gui: prevent multiple instances
* ignore single instance for Android and iOS
---
 Cargo.lock                        | 412 +++++++++++++++++++++++++++++-
 easytier-gui/src-tauri/Cargo.toml |   3 +
 easytier-gui/src-tauri/src/lib.rs |  13 +
 3 files changed, 427 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 5cf88703..8b47fccc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -170,6 +170,30 @@ version = "1.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69f7f8c3906b62b754cd5326047894316021dcfe5a194c8ea52bdd94934a3457"
 
+[[package]]
+name = "async-broadcast"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20cd0e2e25ea8e5f7e9df04578dc6cf5c83577fd09b1a46aaf5c85e1c33f2a7e"
+dependencies = [
+ "event-listener",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-channel"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89b47800b0be77592da0afd425cc03468052844aff33b84e33cc696f64e77b6a"
+dependencies = [
+ "concurrent-queue",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "async-event"
 version = "0.2.1"
@@ -180,6 +204,80 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "async-executor"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7ebdfa2ebdab6b1760375fa7d6f382b9f486eac35fc994625a00e89280bdbb7"
+dependencies = [
+ "async-task",
+ "concurrent-queue",
+ "fastrand",
+ "futures-lite",
+ "slab",
+]
+
+[[package]]
+name = "async-fs"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebcd09b382f40fcd159c2d695175b2ae620ffa5f3bd6f664131efff4e8b9e04a"
+dependencies = [
+ "async-lock",
+ "blocking",
+ "futures-lite",
+]
+
+[[package]]
+name = "async-io"
+version = "2.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "444b0228950ee6501b3568d3c93bf1176a1fdbc3b758dcd9475046d30f4dc7e8"
+dependencies = [
+ "async-lock",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-io",
+ "futures-lite",
+ "parking",
+ "polling",
+ "rustix",
+ "slab",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "async-lock"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff6e472cdea888a4bd64f342f09b3f50e1886d32afe8df3d663c01140b811b18"
+dependencies = [
+ "event-listener",
+ "event-listener-strategy",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-process"
+version = "2.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8a07789659a4d385b79b18b9127fc27e1a59e1e89117c78c5ea3b806f016374"
+dependencies = [
+ "async-channel",
+ "async-io",
+ "async-lock",
+ "async-signal",
+ "async-task",
+ "blocking",
+ "cfg-if",
+ "event-listener",
+ "futures-lite",
+ "rustix",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "async-recursion"
 version = "1.1.1"
@@ -191,6 +289,24 @@ dependencies = [
  "syn 2.0.74",
 ]
 
+[[package]]
+name = "async-signal"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "637e00349800c0bdf8bfc21ebbc0b6524abea702b0da4168ac00d070d0c0b9f3"
+dependencies = [
+ "async-io",
+ "async-lock",
+ "atomic-waker",
+ "cfg-if",
+ "futures-core",
+ "futures-io",
+ "rustix",
+ "signal-hook-registry",
+ "slab",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "async-stream"
 version = "0.3.5"
@@ -213,6 +329,12 @@ dependencies = [
  "syn 2.0.74",
 ]
 
+[[package]]
+name = "async-task"
+version = "4.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b75356056920673b02621b35afd0f7dda9306d03c79a30f5c56c44cf256e3de"
+
 [[package]]
 name = "async-trait"
 version = "0.1.81"
@@ -451,6 +573,19 @@ dependencies = [
  "objc2",
 ]
 
+[[package]]
+name = "blocking"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "703f41c54fc768e63e091340b424302bb1c29ef4aa0c7f10fe849dfb114d29ea"
+dependencies = [
+ "async-channel",
+ "async-task",
+ "futures-io",
+ "futures-lite",
+ "piper",
+]
+
 [[package]]
 name = "boringtun-easytier"
 version = "0.6.0"
@@ -913,6 +1048,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "concurrent-queue"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
@@ -1560,6 +1704,7 @@ dependencies = [
  "tauri-plugin-positioner",
  "tauri-plugin-process",
  "tauri-plugin-shell",
+ "tauri-plugin-single-instance",
  "tauri-plugin-vpnservice",
  "tokio",
 ]
@@ -1669,6 +1814,33 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "endi"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3d8a32ae18130a3c84dd492d4215c3d913c3b07c6b63c2eb3eb7ff1101ab7bf"
+
+[[package]]
+name = "enumflags2"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d232db7f5956f3f14313dc2f87985c58bd2c695ce124c8cdd984e08e15ac133d"
+dependencies = [
+ "enumflags2_derive",
+ "serde",
+]
+
+[[package]]
+name = "enumflags2_derive"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de0d48a183585823424a4ce1aa132d174a6a81bd540895822eb4c8373a8e49e8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.74",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -1701,6 +1873,27 @@ version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a0474425d51df81997e2f90a21591180b38eccf27292d755f3e30750225c175b"
 
+[[package]]
+name = "event-listener"
+version = "5.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6032be9bd27023a771701cc49f9f053c751055f71efb2e0ae5c15809093675ba"
+dependencies = [
+ "concurrent-queue",
+ "parking",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "event-listener-strategy"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f214dc438f977e6d4e3500aaa277f5ad94ca83fbbd9b1a15713ce2344ccc5a1"
+dependencies = [
+ "event-listener",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "exr"
 version = "1.72.0"
@@ -1888,6 +2081,19 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a44623e20b9681a318efdd71c299b6b222ed6f231972bfe2f224ebad6311f0c1"
 
+[[package]]
+name = "futures-lite"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52527eb5074e35e9339c6b4e8d12600c7128b68fb25dcb9fa9dec18f7c25f3a5"
+dependencies = [
+ "fastrand",
+ "futures-core",
+ "futures-io",
+ "parking",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "futures-macro"
 version = "0.3.30"
@@ -2426,6 +2632,12 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
+[[package]]
+name = "hermit-abi"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbf6a919d6cf397374f7dfeeea91d974c7c0a7221d0d0f4f20d859d329e53fcc"
+
 [[package]]
 name = "hex"
 version = "0.4.3"
@@ -3236,7 +3448,7 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "80e04d1dcff3aae0704555fe5fee3bcfaf3d1fdf8a7e521d5b9d2b42acb52cec"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.9",
  "libc",
  "wasi 0.11.0+wasi-snapshot-preview1",
  "windows-sys 0.52.0",
@@ -3439,6 +3651,7 @@ dependencies = [
  "cfg-if",
  "cfg_aliases",
  "libc",
+ "memoffset",
 ]
 
 [[package]]
@@ -3765,6 +3978,16 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
+[[package]]
+name = "ordered-stream"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9aa2b01e1d916879f73a53d01d1d6cee68adbb31d6d9177a8cfce093cced1d50"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "os_info"
 version = "3.8.2"
@@ -3828,6 +4051,12 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "parking"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb813b8af86854136c6922af0598d719255ecb2179515e6e7730d468f05c9cae"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -4078,6 +4307,17 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "piper"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96c8c490f422ef9a4efd2cb5b42b76c8613d7e7dfc1caf667b8a3350a5acc066"
+dependencies = [
+ "atomic-waker",
+ "fastrand",
+ "futures-io",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.30"
@@ -4203,6 +4443,21 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "polling"
+version = "3.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc2790cd301dec6cd3b7a025e4815cf825724a51c98dccfe6a3e55f05ffb6511"
+dependencies = [
+ "cfg-if",
+ "concurrent-queue",
+ "hermit-abi 0.4.0",
+ "pin-project-lite",
+ "rustix",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "poly1305"
 version = "0.8.0"
@@ -4300,6 +4555,15 @@ dependencies = [
  "toml_edit 0.20.7",
 ]
 
+[[package]]
+name = "proc-macro-crate"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d37c51ca738a55da99dc0c4a34860fd675453b8b36209178c2249bb13651284"
+dependencies = [
+ "toml_edit 0.21.1",
+]
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -5994,6 +6258,21 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tauri-plugin-single-instance"
+version = "2.0.0-rc.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de552151b4c9ba9ff72c7244dccaadd47f88d1f0d5caa2603c5c1c12b7636edc"
+dependencies = [
+ "log",
+ "serde",
+ "serde_json",
+ "tauri",
+ "thiserror",
+ "windows-sys 0.52.0",
+ "zbus",
+]
+
 [[package]]
 name = "tauri-plugin-vpnservice"
 version = "0.0.0"
@@ -6392,6 +6671,17 @@ dependencies = [
  "winnow 0.5.40",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.21.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a8534fd7f78b5405e860340ad6575217ce99f38d4d5c8f2442cb5ecb50090e1"
+dependencies = [
+ "indexmap 2.4.0",
+ "toml_datetime",
+ "winnow 0.5.40",
+]
+
 [[package]]
 name = "toml_edit"
 version = "0.22.20"
@@ -6667,6 +6957,17 @@ version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
+[[package]]
+name = "uds_windows"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89daebc3e6fd160ac4aa9fc8b3bf71e1f74fbf92367ae71fb83a037e8bf164b9"
+dependencies = [
+ "memoffset",
+ "tempfile",
+ "winapi",
+]
+
 [[package]]
 name = "unic-char-property"
 version = "0.9.0"
@@ -7606,6 +7907,16 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "xdg-home"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec1cdab258fb55c0da61328dc52c8764709b249011b2cad0454c72f0bf10a1f6"
+dependencies = [
+ "libc",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "yasna"
 version = "0.5.2"
@@ -7615,6 +7926,68 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "zbus"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb97012beadd29e654708a0fdb4c84bc046f537aecfde2c3ee0a9e4b4d48c725"
+dependencies = [
+ "async-broadcast",
+ "async-executor",
+ "async-fs",
+ "async-io",
+ "async-lock",
+ "async-process",
+ "async-recursion",
+ "async-task",
+ "async-trait",
+ "blocking",
+ "enumflags2",
+ "event-listener",
+ "futures-core",
+ "futures-sink",
+ "futures-util",
+ "hex",
+ "nix 0.29.0",
+ "ordered-stream",
+ "rand 0.8.5",
+ "serde",
+ "serde_repr",
+ "sha1",
+ "static_assertions",
+ "tracing",
+ "uds_windows",
+ "windows-sys 0.52.0",
+ "xdg-home",
+ "zbus_macros",
+ "zbus_names",
+ "zvariant",
+]
+
+[[package]]
+name = "zbus_macros"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "267db9407081e90bbfa46d841d3cbc60f59c0351838c4bc65199ecd79ab1983e"
+dependencies = [
+ "proc-macro-crate 3.1.0",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.74",
+ "zvariant_utils",
+]
+
+[[package]]
+name = "zbus_names"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b9b1fef7d021261cc16cba64c351d291b715febe0fa10dc3a443ac5a5022e6c"
+dependencies = [
+ "serde",
+ "static_assertions",
+ "zvariant",
+]
+
 [[package]]
 name = "zerocopy"
 version = "0.7.35"
@@ -7713,3 +8086,40 @@ checksum = "73ab332fe2f6680068f3582b16a24f90ad7096d5d39b974d1c0aff0125116f02"
 dependencies = [
  "simd-adler32",
 ]
+
+[[package]]
+name = "zvariant"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2084290ab9a1c471c38fc524945837734fbf124487e105daec2bb57fd48c81fe"
+dependencies = [
+ "endi",
+ "enumflags2",
+ "serde",
+ "static_assertions",
+ "zvariant_derive",
+]
+
+[[package]]
+name = "zvariant_derive"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73e2ba546bda683a90652bac4a279bc146adad1386f25379cf73200d2002c449"
+dependencies = [
+ "proc-macro-crate 3.1.0",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.74",
+ "zvariant_utils",
+]
+
+[[package]]
+name = "zvariant_utils"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c51bcff7cc3dbb5055396bcf774748c3dab426b4b8659046963523cee4808340"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.74",
+]
diff --git a/easytier-gui/src-tauri/Cargo.toml b/easytier-gui/src-tauri/Cargo.toml
index b88c766e..d7e8b262 100644
--- a/easytier-gui/src-tauri/Cargo.toml
+++ b/easytier-gui/src-tauri/Cargo.toml
@@ -49,3 +49,6 @@ tauri-plugin-autostart = "2.0.0-rc"
 [features]
 # This feature is used for production builds or when a dev server is not specified, DO NOT REMOVE!!
 custom-protocol = ["tauri/custom-protocol"]
+
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+tauri-plugin-single-instance = "2.0.0-rc.0"
diff --git a/easytier-gui/src-tauri/src/lib.rs b/easytier-gui/src-tauri/src/lib.rs
index 49652abc..cbbcaaca 100644
--- a/easytier-gui/src-tauri/src/lib.rs
+++ b/easytier-gui/src-tauri/src/lib.rs
@@ -298,6 +298,19 @@ pub fn run() {
         ));
     }
 
+    #[cfg(not(any(target_os = "android", target_os = "ios")))]
+    {
+        builder = builder
+            .plugin(tauri_plugin_single_instance::init(|app, args, cwd| {
+                app.webview_windows()
+                    .values()
+                    .next()
+                    .expect("Sorry, no window found")
+                    .set_focus()
+                    .expect("Can't Bring Window to Focus");
+            }));
+    }
+
     builder
         .plugin(tauri_plugin_os::init())
         .plugin(tauri_plugin_clipboard_manager::init())