chore: Enable golangci-lint (#7)

.github/workflows/golangci-lint.yml

@@ -0,0 +1,34 @@
+---
+name: golangci-lint
+on:
+  push:
+    paths:
+      - "go.sum"
+      - "go.mod"
+      - "**.go"
+      - ".github/workflows/golangci-lint.yml"
+      - ".golangci.yml"
+  pull_request:
+
+permissions:  # added using https://github.com/step-security/secure-repo
+  contents: read
+
+jobs:
+  golangci:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      pull-requests: read  # for golangci/golangci-lint-action to fetch pull requests
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Install Go
+        uses: actions/setup-go@41dfa10bad2bb2ae585af6ee5bb4d7d973ad74ed # v5.1.0
+        with:
+          go-version: 1.23.x
+      - name: Lint
+        uses: golangci/golangci-lint-action@971e284b6050e8a5849b72094c50ab08da042db8 # v6.1.1
+        with:
+          args: --verbose
+          version: v1.62.0

.golangci.yml

@@ -0,0 +1,12 @@
+---
+linters:
+  enable:
+  # - goimports
+  # - misspell
+  # - revive
+
+issues:
+  exclude-rules:
+    - path: _test.go
+      linters:
+        - errcheck

cloud.go

@@ -150,7 +150,7 @@ func runWebsocketClient() error {
 	if err != nil {
 		return err
 	}
-	defer c.CloseNow()
+	defer c.CloseNow() //nolint:errcheck
 	cloudLogger.Infof("websocket connected to %s", wsURL)
 	runCtx, cancelRun := context.WithCancel(context.Background())
 	defer cancelRun()

cmd/main.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"kvm"
+	"github.com/jetkvm/kvm"
 )
 
 func main() {

config.go

@@ -3,9 +3,10 @@ package kvm
 import (
 	"encoding/json"
 	"fmt"
-	"kvm/internal/usbgadget"
 	"os"
 	"sync"
+
+	"github.com/jetkvm/kvm/internal/usbgadget"
 )
 
 type WakeOnLanDevice struct {

display.go

@@ -211,7 +211,7 @@ func startBacklightTickers() {
 	// Don't start the tickers if the display is switched off.
 	// Set the display to off if that's the case.
 	if config.DisplayMaxBrightness == 0 {
-		setDisplayBrightness(0)
+		_ = setDisplayBrightness(0)
 		return
 	}
 
@@ -221,7 +221,7 @@ func startBacklightTickers() {
 		defer dimTicker.Stop()
 
 		go func() {
-			for {
+			for { //nolint:gosimple
 				select {
 				case <-dimTicker.C:
 					tick_displayDim()
@@ -236,7 +236,7 @@ func startBacklightTickers() {
 		defer offTicker.Stop()
 
 		go func() {
-			for {
+			for { //nolint:gosimple
 				select {
 				case <-offTicker.C:
 					tick_displayOff()

go.mod

@@ -1,4 +1,4 @@
-module kvm
+module github.com/jetkvm/kvm
 
 go 1.21.0
 
@@ -15,7 +15,6 @@ require (
 	github.com/gwatts/rootcerts v0.0.0-20240401182218-3ab9db955caf
 	github.com/hanwen/go-fuse/v2 v2.5.1
 	github.com/hashicorp/go-envparse v0.1.0
-	github.com/openstadia/go-usb-gadget v0.0.0-20231115171102-aebd56bbb965
 	github.com/pion/logging v0.2.2
 	github.com/pion/mdns/v2 v2.0.7
 	github.com/pion/webrtc/v4 v4.0.0

go.sum

@@ -87,8 +87,6 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/openstadia/go-usb-gadget v0.0.0-20231115171102-aebd56bbb965 h1:bZGtUfkOl0dqvem8ltx9KCYied0gSlRuDhaZDxgppN4=
-github.com/openstadia/go-usb-gadget v0.0.0-20231115171102-aebd56bbb965/go.mod h1:6cAIK2c4O3/yETSrRjmNwsBL3yE4Vcu9M9p/Qwx5+gM=
 github.com/pelletier/go-toml/v2 v2.2.2 h1:aYUidT7k73Pcl9nb2gScu7NSrKCSHIDE89b3+6Wq+LM=
 github.com/pelletier/go-toml/v2 v2.2.2/go.mod h1:1t835xjRzz80PqgE6HHgN2JOsmgYu/h4qDAS4n929Rs=
 github.com/pilebones/go-udev v0.9.0 h1:N1uEO/SxUwtIctc0WLU0t69JeBxIYEYnj8lT/Nabl9Q=

hw.go

@@ -14,7 +14,7 @@ func extractSerialNumber() (string, error) {
 		return "", err
 	}
 
-	r, err := regexp.Compile("Serial\\s*:\\s*(\\S+)")
+	r, err := regexp.Compile(`Serial\s*:\s*(\S+)`)
 	if err != nil {
 		return "", fmt.Errorf("failed to compile regex: %w", err)
 	}
@@ -27,7 +27,7 @@ func extractSerialNumber() (string, error) {
 	return matches[1], nil
 }
 
-func readOtpEntropy() ([]byte, error) {
+func readOtpEntropy() ([]byte, error) { //nolint:unused
 	content, err := os.ReadFile("/sys/bus/nvmem/devices/rockchip-otp0/nvmem")
 	if err != nil {
 		return nil, err

jiggler.go

@@ -6,10 +6,6 @@ import (
 
 var lastUserInput = time.Now()
 
-func resetUserInputTime() {
-	lastUserInput = time.Now()
-}
-
 var jigglerEnabled = false
 
 func rpcSetJigglerState(enabled bool) {

jsonrpc.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"kvm/internal/usbgadget"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -15,6 +14,8 @@ import (
 
 	"github.com/pion/webrtc/v4"
 	"go.bug.st/serial"
+
+	"github.com/jetkvm/kvm/internal/usbgadget"
 )
 
 type JSONRPCRequest struct {
@@ -195,8 +196,7 @@ func rpcSetEDID(edid string) error {
 
 	// Save EDID to config, allowing it to be restored on reboot.
 	config.EdidString = edid
-	SaveConfig()
+	_ = SaveConfig()
-
 	return nil
 }
 
@@ -596,18 +596,18 @@ func rpcSetActiveExtension(extensionId string) error {
 		return nil
 	}
 	if config.ActiveExtension == "atx-power" {
-		unmountATXControl()
+		_ = unmountATXControl()
 	} else if config.ActiveExtension == "dc-power" {
-		unmountDCControl()
+		_ = unmountDCControl()
 	}
 	config.ActiveExtension = extensionId
 	if err := SaveConfig(); err != nil {
 		return fmt.Errorf("failed to save config: %w", err)
 	}
 	if extensionId == "atx-power" {
-		mountATXControl()
+		_ = mountATXControl()
 	} else if extensionId == "dc-power" {
-		mountDCControl()
+		_ = mountDCControl()
 	}
 	return nil
 }
@@ -728,7 +728,7 @@ func rpcSetSerialSettings(settings SerialSettings) error {
 		Parity:   parity,
 	}
 
-	port.SetMode(serialPortMode)
+	_ = port.SetMode(serialPortMode)
 
 	return nil
 }

log.go

@@ -5,5 +5,4 @@ import "github.com/pion/logging"
 // we use logging framework from pion
 // ref: https://github.com/pion/webrtc/wiki/Debugging-WebRTC
 var logger = logging.NewDefaultLoggerFactory().NewLogger("jetkvm")
-var usbLogger = logging.NewDefaultLoggerFactory().NewLogger("usb")
 var cloudLogger = logging.NewDefaultLoggerFactory().NewLogger("cloud")

main.go

@@ -49,7 +49,7 @@ func Main() {
 		time.Sleep(15 * time.Minute)
 		for {
 			logger.Debugf("UPDATING - Auto update enabled: %v", config.AutoUpdateEnabled)
-			if config.AutoUpdateEnabled == false {
+			if !config.AutoUpdateEnabled {
 				return
 			}
 			if currentSession != nil {

native.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"kvm/resource"
 	"net"
 	"os"
 	"os/exec"
@@ -13,6 +12,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/jetkvm/kvm/resource"
+
 	"github.com/pion/webrtc/v4/pkg/media"
 )
 
@@ -90,8 +91,8 @@ func WriteCtrlMessage(message []byte) error {
 	return err
 }
 
-var nativeCtrlSocketListener net.Listener
+var nativeCtrlSocketListener net.Listener  //nolint:unused
-var nativeVideoSocketListener net.Listener
+var nativeVideoSocketListener net.Listener //nolint:unused
 
 var ctrlClientConnected = make(chan struct{})
 

network.go

@@ -107,7 +107,7 @@ func checkNetworkState() {
 	if newState != networkState {
 		logger.Info("network state changed")
 		// restart MDNS
-		startMDNS()
+		_ = startMDNS()
 		networkState = newState
 		requestDisplayUpdate()
 	}

ntp.go

@@ -20,7 +20,6 @@ const (
 )
 
 var (
-	timeSynced            = false
 	timeSyncRetryInterval = 0 * time.Second
 	defaultNTPServers     = []string{
 		"time.cloudflare.com",
@@ -58,7 +57,6 @@ func TimeSyncLoop() {
 			continue
 		}
 		logger.Infof("Time sync successful, now is: %v, time taken: %v", time.Now(), time.Since(start))
-		timeSynced = true
 		time.Sleep(timeSyncInterval) // after the first sync is done
 	}
 }

remote_mount.go

@@ -49,7 +49,7 @@ func (w *WebRTCDiskReader) Read(ctx context.Context, offset int64, size int64) (
 	if err != nil {
 		return nil, err
 	}
-	buf := make([]byte, 0)
+	var buf []byte
 	for {
 		select {
 		case data := <-diskReadChan:

serial.go

@@ -16,14 +16,14 @@ const serialPortPath = "/dev/ttyS3"
 var port serial.Port
 
 func mountATXControl() error {
-	port.SetMode(defaultMode)
+	_ = port.SetMode(defaultMode)
 	go runATXControl()
 
 	return nil
 }
 
 func unmountATXControl() error {
-	reopenSerialPort()
+	_ = reopenSerialPort()
 	return nil
 }
 
@@ -122,13 +122,13 @@ func pressATXResetButton(duration time.Duration) error {
 }
 
 func mountDCControl() error {
-	port.SetMode(defaultMode)
+	_ = port.SetMode(defaultMode)
 	go runDCControl()
 	return nil
 }
 
 func unmountDCControl() error {
-	reopenSerialPort()
+	_ = reopenSerialPort()
 	return nil
 }
 
@@ -212,11 +212,11 @@ var defaultMode = &serial.Mode{
 }
 
 func initSerialPort() {
-	reopenSerialPort()
+	_ = reopenSerialPort()
 	if config.ActiveExtension == "atx-power" {
-		mountATXControl()
+		_ = mountATXControl()
 	} else if config.ActiveExtension == "dc-power" {
-		mountDCControl()
+		_ = mountDCControl()
 	}
 }
 

terminal.go

@@ -55,11 +55,13 @@ func handleTerminalChannel(d *webrtc.DataChannel) {
 			var size TerminalSize
 			err := json.Unmarshal([]byte(msg.Data), &size)
 			if err == nil {
-				pty.Setsize(ptmx, &pty.Winsize{
+				err = pty.Setsize(ptmx, &pty.Winsize{
 					Rows: uint16(size.Rows),
 					Cols: uint16(size.Cols),
 				})
-				return
+				if err == nil {
+					return
+				}
 			}
 			logger.Errorf("Failed to parse terminal size: %v", err)
 		}
@@ -74,7 +76,7 @@ func handleTerminalChannel(d *webrtc.DataChannel) {
 			ptmx.Close()
 		}
 		if cmd != nil && cmd.Process != nil {
-			cmd.Process.Kill()
+			_ = cmd.Process.Kill()
 		}
 	})
 }

usb.go

@@ -1,7 +1,7 @@
 package kvm
 
 import (
-	"kvm/internal/usbgadget"
+	"github.com/jetkvm/kvm/internal/usbgadget"
 	"time"
 )
 
@@ -37,10 +37,6 @@ func rpcWheelReport(wheelY int8) error {
 	return gadget.AbsMouseWheelReport(wheelY)
 }
 
-func rpcRelMouseReport(mx, my int8, buttons uint8) error {
-	return gadget.RelMouseReport(mx, my, buttons)
-}
-
 var usbState = "unknown"
 
 func rpcGetUSBState() (state string) {

usb_mass_storage.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"kvm/resource"
 	"net/http"
 	"os"
 	"path"
@@ -16,14 +15,12 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
-
 	"github.com/psanford/httpreadat"
-
 	"github.com/google/uuid"
 	"github.com/pion/webrtc/v4"
-)
 
-const massStorageName = "mass_storage.usb0"
+	"github.com/jetkvm/kvm/resource"
+)
 
 func writeFile(path string, data string) error {
 	return os.WriteFile(path, []byte(data), 0644)
@@ -65,11 +62,11 @@ func onDiskMessage(msg webrtc.DataChannelMessage) {
 func mountImage(imagePath string) error {
 	err := setMassStorageImage("")
 	if err != nil {
-		return fmt.Errorf("Remove Mass Storage Image Error", err)
+		return fmt.Errorf("Remove Mass Storage Image Error: %w", err)
 	}
 	err = setMassStorageImage(imagePath)
 	if err != nil {
-		return fmt.Errorf("Set Mass Storage Image Error", err)
+		return fmt.Errorf("Set Mass Storage Image Error: %w", err)
 	}
 	return nil
 }

wol.go

@@ -43,7 +43,7 @@ func createMagicPacket(mac net.HardwareAddr) []byte {
 
 	// Write the target MAC address 16 times
 	for i := 0; i < 16; i++ {
-		binary.Write(&buf, binary.BigEndian, mac)
+		_ = binary.Write(&buf, binary.BigEndian, mac)
 	}
 
 	return buf.Bytes()