feat: add CLI with Cobra and timestamped logging

Introduce structured CLI argument parsing using Cobra with three
configurable flags:
  --vendor: USB vendor ID (default: 0x0fcf)
  --product: USB product ID (default: 0x1008)
  --device: ANT+ device number (default: 3001)

Add timestamped logging for all log statements with format
YYYY-MM-DD HH:MM:SS. Log vendor, product, and device values at
startup in both hex and decimal.

Remove hardcoded USB identifiers from main.go and consolidate all
startup logic into cli.go with a dedicated Config struct.

Update ant.go ListenForTrainer signature to accept uint16 for
vendor and product IDs.

Makefile

@@ -15,7 +15,7 @@ vet: fmt
 
 build: vet
 	mkdir -p bin
-	go build -ldflags "-X main.Version=$(shell git rev-parse HEAD ) -X main.BuildTime=$(shell date +'%Y-%m-%dT%H:%M:%S')" -o bin ./cmd/...
+	go build -ldflags "-X main.Version=$(shell git rev-parse HEAD ) -X main.BuildTime=$(shell date +'%Y-%m-%dT%H:%M:%S')" -o bin/bridge ./cmd/...
 
 install: build
 	go install ./...

cmd/bridge/ant.go

@@ -26,9 +26,9 @@ func resetAndWait(drv io.ReadWriter) error {
 	}
 }
 
-func ListenForTrainer(vendorId gousb.ID, productId gousb.ID, deviceNumber uint32,
+func ListenForTrainer(vendorId uint16, productId uint16, deviceNumber uint32,
 	events chan<- Event) {
-	drv, err := usb.GetDevice(vendorId, productId)
+	drv, err := usb.GetDevice(gousb.ID(vendorId), gousb.ID(productId))
 	if err != nil {
 		panic(err)
 	}

cmd/bridge/cli.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strconv"
+
+	"github.com/spf13/cobra"
+)
+
+// Version and BuildTime are injected via ldflags at build time.
+var Version = "unknown"
+var BuildTime = "unknown"
+
+func parseHex(s string, bits int) (uint64, error) {
+	return strconv.ParseUint(s, 0, bits)
+}
+
+type config struct {
+	vendor       string
+	product      string
+	device       string
+	vendorID     uint64
+	productID    uint64
+	deviceNumber uint32
+}
+
+func newConfig() *config {
+	return &config{}
+}
+
+var rootCmd = &cobra.Command{
+	Use:   "bridge",
+	Short: "ANT+ to Bluetooth LE bridge",
+	Long: `Bridge an ANT+ cycling power trainer over Bluetooth Low Energy.
+This allows these trainers to be used with modern devices that don't support ANT+.`,
+	Version: fmt.Sprintf("%s (built %s)", Version, BuildTime),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c := newConfig()
+
+		c.vendor = cmd.Flags().Lookup("vendor").Value.String()
+		c.product = cmd.Flags().Lookup("product").Value.String()
+		c.device = cmd.Flags().Lookup("device").Value.String()
+
+		vendorID, err := parseHex(c.vendor, 16)
+		if err != nil {
+			return fmt.Errorf("invalid --vendor %q: %w", c.vendor, err)
+		}
+		productID, err := parseHex(c.product, 16)
+		if err != nil {
+			return fmt.Errorf("invalid --product %q: %w", c.product, err)
+		}
+		deviceNumber, err := parseHex(c.device, 32)
+		if err != nil {
+			return fmt.Errorf("invalid --device %q: %w", c.device, err)
+		}
+
+		c.vendorID = vendorID
+		c.productID = productID
+		c.deviceNumber = uint32(deviceNumber)
+
+		logMsgf("ANT Bridge %s built %s", Version, BuildTime)
+		logMsgf("vendor: 0x%04x/%d", vendorID, vendorID)
+		logMsgf("product: 0x%04x/%d", productID, productID)
+		logMsgf("device: 0x%03x/%d", deviceNumber, deviceNumber)
+
+		exec.Command("hciconfig", "hci0", "down").Run()
+		exec.Command("hciconfig", "hci0", "up").Run()
+
+		events := make(chan Event)
+		go ListenForTrainer(uint16(c.vendorID), uint16(c.productID), c.deviceNumber, events)
+		ExposeBluetooth(events)
+
+		return nil
+	},
+}
+
+func init() {
+	rootCmd.Flags().String("vendor", "0x0fcf", "USB vendor ID (hex, e.g. 0x0fcf)")
+	rootCmd.Flags().String("product", "0x1008", "USB product ID (hex, e.g. 0x1008)")
+	rootCmd.Flags().String("device", "3001", "ANT+ device number (hex or decimal, e.g. 3001 or 0xbb9)")
+}
+
+func main() {
+	if err := rootCmd.Execute(); err != nil {
+		os.Exit(1)
+	}
+}

cmd/bridge/log.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func logMsg(msg string) {
+	fmt.Println(time.Now().Format("2006-01-02 15:04:05") + " " + msg)
+}
+
+func logPrintf(format string, a ...any) {
+	fmt.Printf(time.Now().Format("2006-01-02 15:04:05")+" "+format, a...)
+}
+
+func logMsgf(format string, a ...any) {
+	logPrintf(format+"\n", a...)
+}

cmd/bridge/main.go

@@ -1,20 +0,0 @@
-package main
-
-import (
-	"os/exec"
-
-	"github.com/google/gousb"
-)
-
-func main() {
-	exec.Command("hciconfig", "hci0", "down").Run()
-	exec.Command("hciconfig", "hci0", "up").Run()
-
-	var vendorId gousb.ID = 0x0fcf
-	var productId gousb.ID = 0x1008
-	var deviceNumber uint32 = 3001
-
-	events := make(chan Event)
-	go ListenForTrainer(vendorId, productId, deviceNumber, events)
-	ExposeBluetooth(events)
-}

go.mod

@@ -4,9 +4,15 @@ go 1.26.2
 
 require (
 	github.com/half2me/antgo v0.0.0-20240825222428-e6b9ddc9c32f
+	github.com/spf13/cobra v1.10.2
 	tinygo.org/x/bluetooth v0.15.0
 )
 
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.9 // indirect
+)
+
 require (
 	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect

go.sum

@@ -1,3 +1,4 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -9,9 +10,12 @@ github.com/google/gousb v1.1.3 h1:xt6M5TDsGSZ+rlomz5Si5Hmd/Fvbmo2YCJHN+yGaK4o=
 github.com/google/gousb v1.1.3/go.mod h1:GGWUkK0gAXDzxhwrzetW592aOmkkqSGcj5KLEgmCVUg=
 github.com/half2me/antgo v0.0.0-20240825222428-e6b9ddc9c32f h1:T1EVnxPi3CqwmJdOs/s76vplnG8t0MEFmwo3bvHrZAo=
 github.com/half2me/antgo v0.0.0-20240825222428-e6b9ddc9c32f/go.mod h1:BXp/M+7//3V0GY2ytRJw4vcxZve8mQ0zRVuow+fANkE=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/saltosystems/winrt-go v0.0.0-20260317170058-9c2fec580d96 h1:IXxzj3yjfDNXZJ35foY+RpFShqPsZZ81hhCckgfh5PI=
 github.com/saltosystems/winrt-go v0.0.0-20260317170058-9c2fec580d96/go.mod h1:CIltaIm7qaANUIvzr0Vmz71lmQMAIbGJ7cvgzX7FMfA=
 github.com/sirupsen/logrus v1.5.0/go.mod h1:+F7Ogzej0PZc/94MaYx/nvG9jOFMD2osvC3s+Squfpo=
@@ -23,6 +27,10 @@ github.com/soypat/lneto v0.1.0 h1:VAHCJ33hvC3wDqhM0Vm7w0k6vwNsOCAsQ8XTrXJpS7I=
 github.com/soypat/lneto v0.1.0/go.mod h1:g/8Lk+hIsMZydyWDJjK2YfsCuG6jA5mWCO6U+4S7w1U=
 github.com/soypat/seqs v0.0.0-20250124201400-0d65bc7c1710 h1:Y9fBuiR/urFY/m76+SAZTxk2xAOS2n85f+H1CugajeA=
 github.com/soypat/seqs v0.0.0-20250124201400-0d65bc7c1710/go.mod h1:oCVCNGCHMKoBj97Zp9znLbQ1nHxpkmOY9X+UAGzOxc8=
+github.com/spf13/cobra v1.10.2 h1:DMTTonx5m65Ic0GOoRY2c16WCbHxOOw6xxezuLaBpcU=
+github.com/spf13/cobra v1.10.2/go.mod h1:7C1pvHqHw5A4vrJfjNwvOdzYu0Gml16OCs2GRiTUUS4=
+github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
+github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@@ -32,6 +40,7 @@ github.com/tinygo-org/cbgo v0.0.4 h1:3D76CRYbH03Rudi8sEgs/YO0x3JIMdyq8jlQtk/44fU
 github.com/tinygo-org/cbgo v0.0.4/go.mod h1:7+HgWIHd4nbAz0ESjGlJ1/v9LDU1Ox8MGzP9mah/fLk=
 github.com/tinygo-org/pio v0.3.0 h1:opEnOtw58KGB4RJD3/n/Rd0/djYGX3DeJiXLI6y/yDI=
 github.com/tinygo-org/pio v0.3.0/go.mod h1:wf6c6lKZp+pQOzKKcpzchmRuhiMc27ABRuo7KVnaMFU=
+go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
 golang.org/x/exp v0.0.0-20241204233417-43b7b7cde48d h1:0olWaB5pg3+oychR51GUVCEsGkeCU/2JxjBgIo4f3M0=
 golang.org/x/exp v0.0.0-20241204233417-43b7b7cde48d/go.mod h1:qj5a5QZpwLU2NLQudwIN5koi3beDhSAlJwa67PuM98c=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=