version: stop using go version tags in repo

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

4 files changed, 33 insertions, 5 deletions

diff --git a/go.mod b/go.mod
index bd2d5d25..c13f089b 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	golang.org/x/net v0.0.0-20210119194325-5f4716e94777
 	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
 	golang.org/x/text v0.3.5
-	golang.zx2c4.com/wireguard v0.0.20201119-0.20210128142622-6a128dde71d9
+	golang.zx2c4.com/wireguard v0.0.0-20210128162339-bf3bb888512e
 )
 
 replace (
diff --git a/go.sum b/go.sum
index 0d6c9189..7aeea8c2 100644
--- a/go.sum
+++ b/go.sum
@@ -20,8 +20,8 @@ golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e h1:FDhOuMEY4JVRztM/gsbk+IKUQ8kj74bxZrgw87eMMVc=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.zx2c4.com/wireguard v0.0.20201119-0.20210128142622-6a128dde71d9 h1:9qTywLj02s2UQn7z8++V8sFSXblOg+Uc8vDA7MM6rwk=
-golang.zx2c4.com/wireguard v0.0.20201119-0.20210128142622-6a128dde71d9/go.mod h1:r0ExowOoGFfDoLDxx+M9SYbNVsoZ0xviLL+K4f2mt+A=
+golang.zx2c4.com/wireguard v0.0.0-20210128162339-bf3bb888512e h1:l1b5JcJtTQvleon/yyzRy3q7FltfkVrQL7SPdxj5KXI=
+golang.zx2c4.com/wireguard v0.0.0-20210128162339-bf3bb888512e/go.mod h1:r0ExowOoGFfDoLDxx+M9SYbNVsoZ0xviLL+K4f2mt+A=
 golang.zx2c4.com/wireguard/windows v0.0.0-20201107183008-659a4e955570 h1:sbXpfRwl+7YQY72KBuzyacG7ucr6w4OueJiEb7+pvSk=
 golang.zx2c4.com/wireguard/windows v0.0.0-20201107183008-659a4e955570/go.mod h1:KxxjdtRkfNoYDCUP5ryK7XJJNTnpC8atvtmTheChOtk=
 golang.zx2c4.com/wireguard/windows v0.0.0-20210121140954-e7fc19d483bd h1:kAUzMAITME2MCtrXBaUa9P4tndiXGWO674k9gn6ZR28=
diff --git a/ui/aboutdialog.go b/ui/aboutdialog.go
index 19fe02e9..cb05b5f4 100644
--- a/ui/aboutdialog.go
+++ b/ui/aboutdialog.go
@@ -12,7 +12,7 @@ import (
 	"github.com/lxn/walk"
 	"github.com/lxn/win"
 	"golang.org/x/sys/windows"
-	"golang.zx2c4.com/wireguard/device"
+
 	"golang.zx2c4.com/wireguard/windows/l18n"
 	"golang.zx2c4.com/wireguard/windows/version"
 )
@@ -95,7 +95,7 @@ func runAboutDialog(owner walk.Form) error {
 		return err
 	}
 	detailsLbl.SetTextAlignment(walk.AlignHCenterVNear)
-	detailsLbl.SetText(l18n.Sprintf("App version: %s\nGo backend version: %s\nGo version: %s-%s\nOperating system: %s\nArchitecture: %s", version.Number, device.WireGuardGoVersion, strings.TrimPrefix(runtime.Version(), "go"), runtime.GOARCH, version.OsName(), version.NativeArch()))
+	detailsLbl.SetText(l18n.Sprintf("App version: %s\nGo backend version: %s\nGo version: %s-%s\nOperating system: %s\nArchitecture: %s", version.Number, version.ProtoImplementation(), strings.TrimPrefix(runtime.Version(), "go"), runtime.GOARCH, version.OsName(), version.NativeArch()))
 
 	copyrightLbl, err := walk.NewTextLabel(showingAboutDialog)
 	if err != nil {
diff --git a/version/protocol.go b/version/protocol.go
new file mode 100644
index 00000000..72a35e95
--- /dev/null
+++ b/version/protocol.go
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
+ */
+
+package version
+
+import (
+	"runtime/debug"
+	"strings"
+)
+
+func ProtoImplementation() string {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "unknown"
+	}
+	for _, dep := range info.Deps {
+		if dep.Path == "golang.zx2c4.com/wireguard" {
+			parts := strings.Split(dep.Version, "-")
+			if len(parts) == 3 && len(parts[2]) == 12 {
+				return parts[2][:7]
+			}
+			return dep.Version
+		}
+	}
+	return "unknown"
+}