fix: robust wireguard-go build with Go version fallback

Show build output instead of suppressing errors. Try make first, then
direct go build. If both fail (old Go version), install newer Go via
snap and retry. JetPack ships Go 1.18 but wireguard-go needs 1.20+.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: SashaMIT

scripts/install-arm.sh

@@ -230,25 +230,75 @@ install_wireguard() {
                 fi
 
                 if command -v go &>/dev/null; then
-                    print_step "Building wireguard-go from source (takes 1-2 minutes)..."
+                    GO_VERSION=$(go version 2>/dev/null | grep -oP 'go\K[0-9]+\.[0-9]+' || echo "0.0")
+                    print_step "Building wireguard-go from source (Go $GO_VERSION, takes 1-2 minutes)..."
                     TMPDIR_WG=$(mktemp -d)
+                    WG_BUILT=false
+
                     if git clone --depth 1 https://git.zx2c4.com/wireguard-go "$TMPDIR_WG/wireguard-go" 2>/dev/null; then
                         cd "$TMPDIR_WG/wireguard-go"
-                        if make 2>/dev/null; then
+                        # Try make first (uses Makefile), fall back to direct go build
+                        if make 2>&1; then
+                            sudo cp wireguard-go /usr/local/bin/
+                            sudo chmod +x /usr/local/bin/wireguard-go
+                            WG_BUILT=true
+                        elif go build -o wireguard-go 2>&1; then
                             sudo cp wireguard-go /usr/local/bin/
                             sudo chmod +x /usr/local/bin/wireguard-go
-                            print_ok "wireguard-go built and installed"
-                            WG_MODE="userspace"
+                            WG_BUILT=true
                         else
-                            print_warn "wireguard-go build failed"
+                            print_warn "wireguard-go source build failed (Go version may be too old, need 1.20+)"
                         fi
                         cd "$HOME"
-                    else
-                        print_warn "Failed to clone wireguard-go repository"
                     fi
                     rm -rf "$TMPDIR_WG"
+
+                    # If source build failed, try upgrading Go and retrying
+                    if [ "$WG_BUILT" = false ]; then
+                        print_step "Trying newer Go version via snap..."
+                        if sudo snap install go --classic 2>/dev/null; then
+                            export PATH="/snap/bin:$PATH"
+                            TMPDIR_WG2=$(mktemp -d)
+                            if git clone --depth 1 https://git.zx2c4.com/wireguard-go "$TMPDIR_WG2/wireguard-go" 2>/dev/null; then
+                                cd "$TMPDIR_WG2/wireguard-go"
+                                if make 2>&1 || go build -o wireguard-go 2>&1; then
+                                    sudo cp wireguard-go /usr/local/bin/
+                                    sudo chmod +x /usr/local/bin/wireguard-go
+                                    WG_BUILT=true
+                                fi
+                                cd "$HOME"
+                            fi
+                            rm -rf "$TMPDIR_WG2"
+                        fi
+                    fi
+
+                    if [ "$WG_BUILT" = true ]; then
+                        print_ok "wireguard-go built and installed"
+                        WG_MODE="userspace"
+                    else
+                        print_warn "Could not build wireguard-go -- will fall back to Boson relay"
+                    fi
                 else
                     print_warn "Go compiler not available, cannot build wireguard-go"
+                    print_step "Installing Go compiler..."
+                    sudo apt-get install -y -qq golang-go 2>/dev/null || sudo snap install go --classic 2>/dev/null || true
+                    if command -v go &>/dev/null; then
+                        print_step "Retrying wireguard-go build..."
+                        TMPDIR_WG=$(mktemp -d)
+                        if git clone --depth 1 https://git.zx2c4.com/wireguard-go "$TMPDIR_WG/wireguard-go" 2>/dev/null; then
+                            cd "$TMPDIR_WG/wireguard-go"
+                            if make 2>&1 || go build -o wireguard-go 2>&1; then
+                                sudo cp wireguard-go /usr/local/bin/
+                                sudo chmod +x /usr/local/bin/wireguard-go
+                                print_ok "wireguard-go built and installed"
+                                WG_MODE="userspace"
+                            else
+                                print_warn "wireguard-go build failed even with fresh Go"
+                            fi
+                            cd "$HOME"
+                        fi
+                        rm -rf "$TMPDIR_WG"
+                    fi
                 fi
             fi
         fi