add MIT license, AUR packaging files, and credits

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024-2026 Wakatron
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -398,6 +398,16 @@ Dependencies:
 
 ---
 
+## Credits
+
+This project builds on the work of the following open-source libraries:
+
+- **[dh1tw/streamdeck](https://github.com/dh1tw/streamdeck)** (MIT) — Go protocol driver for Elgato Stream Deck devices
+- **[bearsh/hid](https://github.com/bearsh/hid)** (MIT) — Go USB HID bindings via CGO / libusb
+- **[disintegration/gift](https://github.com/disintegration/gift)** (MIT) — Go Image Filtering Toolkit
+
+---
+
 ## License
 
 MIT

daemon.go

@@ -15,6 +15,7 @@ type RunOptions struct {
 	HTTPAddr    string
 	HTTPEnabled bool
 	NoDeck      bool
+	StartPage   string
 }
 
 func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
@@ -63,6 +64,16 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 	primaryPM := pageMgrs[0]
 	primaryDeck := decks[0]
 
+	startPage := opts.StartPage
+	if startPage == "" {
+		startPage = cfg.DefaultPage
+	}
+	if !pageExists(cfg.Pages, startPage) {
+		slog.Warn("start page not found in pages, falling back to default",
+			"requested", startPage, "default", cfg.DefaultPage)
+		startPage = cfg.DefaultPage
+	}
+
 	defer func() {
 		for _, d := range decks {
 			d.Close()
@@ -78,8 +89,8 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 	web.SetExtraPageManagers(pageMgrs[1:])
 
 	for _, pm := range pageMgrs {
-		if err := pm.ActivatePage(cfg.DefaultPage); err != nil {
-			slog.Warn("activate default page", "error", err)
+		if err := pm.ActivatePage(startPage); err != nil {
+			slog.Warn("activate start page", "error", err)
 		}
 		pm.startPeriodicKeys()
 	}
@@ -98,7 +109,7 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 		windowCh, _ = detector.Start(ctx)
 	}
 
-	asm := NewAutoSwitchManager(cfg.AutoSwitch, cfg.DefaultPage)
+	asm := NewAutoSwitchManager(cfg.AutoSwitch, startPage)
 
 	ssCtrl := NewScreensaver(&cfg.Screensaver)
 
@@ -149,7 +160,7 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 				asm.Pause()
 
 				primaryDeck.Close()
-				newDeck := reconnectDeck(ctx, cfg, &primaryPM)
+				newDeck := reconnectDeck(ctx, cfg, &primaryPM, startPage)
 				if newDeck == nil {
 					return ctx.Err()
 				}
@@ -162,7 +173,7 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 				web.SetPageManager(primaryPM)
 
 				newDeck.SetBrightness(deviceBrightness(cfg, newDeck.Serial()))
-				asm.NotifyManualPage(cfg.DefaultPage)
+				asm.NotifyManualPage(startPage)
 				asm.Resume()
 				continue
 			}
@@ -288,7 +299,7 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 				asm.Pause()
 
 				primaryDeck.Close()
-				newDeck := reconnectDeck(ctx, cfg, &primaryPM)
+				newDeck := reconnectDeck(ctx, cfg, &primaryPM, startPage)
 				if newDeck == nil {
 					return ctx.Err()
 				}
@@ -301,7 +312,7 @@ func Run(ctx context.Context, cfg *config.Config, opts RunOptions) error {
 				web.SetPageManager(primaryPM)
 
 				newDeck.SetBrightness(deviceBrightness(cfg, newDeck.Serial()))
-				asm.NotifyManualPage(cfg.DefaultPage)
+				asm.NotifyManualPage(startPage)
 				asm.Resume()
 			}
 
@@ -353,7 +364,7 @@ func deviceBrightness(cfg *config.Config, serial string) int {
 	return 75
 }
 
-func reconnectDeck(ctx context.Context, cfg *config.Config, pm **PageManager) *Deck {
+func reconnectDeck(ctx context.Context, cfg *config.Config, pm **PageManager, startPage string) *Deck {
 	for {
 		newDeck, err := OpenDeck("")
 		if err == nil {
@@ -361,7 +372,7 @@ func reconnectDeck(ctx context.Context, cfg *config.Config, pm **PageManager) *D
 			(*pm).defaultFont = cfg.Font
 			(*pm).showLabelBackground = cfg.ShowLabelBackground
 			(*pm).LoadPages(cfg.Pages)
-			(*pm).ActivatePage(cfg.DefaultPage)
+			(*pm).ActivatePage(startPage)
 			(*pm).startPeriodicKeys()
 			return newDeck
 		}
@@ -372,3 +383,13 @@ func reconnectDeck(ctx context.Context, cfg *config.Config, pm **PageManager) *D
 		}
 	}
 }
+
+// pageExists reports whether pages contains a page with the given name.
+func pageExists(pages []config.PageConfig, name string) bool {
+	for _, p := range pages {
+		if p.Name == name {
+			return true
+		}
+	}
+	return false
+}

dist/arch/.SRCINFO

@@ -0,0 +1,23 @@
+pkgbase = streamdeck-lets-go-git
+	pkgdesc = Lightweight daemon for controlling Elgato Stream Deck devices with a built-in web UI
+	pkgver = r0.unknown
+	pkgrel = 1
+	url = https://github.com/Wakatron/streamdeck-lets-go
+	arch = x86_64
+	arch = aarch64
+	license = MIT
+	makedepends = go>=1.26
+	makedepends = git
+	depends = libusb-1.0
+	optdepends = librsvg: SVG icon rendering
+	optdepends = fontconfig: system font detection
+	provides = streamdeck-lets-go
+	conflicts = streamdeck-lets-go
+	source = streamdeck-lets-go-git::git+https://github.com/Wakatron/streamdeck-lets-go.git
+	source = streamdeck-lets-go.service
+	source = 90-streamdeck.rules
+	b2sums = SKIP
+	b2sums = SKIP
+	b2sums = SKIP
+
+pkgname = streamdeck-lets-go-git

dist/arch/90-streamdeck.rules

@@ -0,0 +1,7 @@
+# Elgato Stream Deck — allow access for locally logged-in users
+# Vendor 0fd9
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0fd9", ATTRS{idProduct}=="0060", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0fd9", ATTRS{idProduct}=="0063", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0fd9", ATTRS{idProduct}=="006c", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0fd9", ATTRS{idProduct}=="006d", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0fd9", ATTRS{idProduct}=="0080", TAG+="uaccess"

dist/arch/PKGBUILD

@@ -0,0 +1,48 @@
+# Maintainer: Wakatron <wakatron@example.com>
+
+pkgname=streamdeck-lets-go-git
+_giturl=https://github.com/Wakatron/streamdeck-lets-go.git
+pkgver=r0.unknown
+pkgrel=1
+pkgdesc="Lightweight daemon for controlling Elgato Stream Deck devices with a built-in web UI"
+arch=('x86_64' 'aarch64')
+url="https://github.com/Wakatron/streamdeck-lets-go"
+license=('MIT')
+depends=('libusb-1.0')
+optdepends=('librsvg: SVG icon rendering'
+            'fontconfig: system font detection')
+makedepends=('go>=1.26' 'git')
+provides=('streamdeck-lets-go')
+conflicts=('streamdeck-lets-go')
+
+source=("${pkgname}::git+${_giturl}"
+        "streamdeck-lets-go.service"
+        "90-streamdeck.rules")
+b2sums=('SKIP'
+        'SKIP'
+        'SKIP')
+
+pkgver() {
+  cd "${srcdir}/${pkgname}"
+  git describe --always --tags 2>/dev/null || echo "r0.$(git rev-parse --short HEAD)"
+}
+
+build() {
+  cd "${srcdir}/${pkgname}"
+  export CGO_ENABLED=1
+  go build \
+    -ldflags "-s -w" \
+    -o streamdeck-lets-go .
+}
+
+package() {
+  cd "${srcdir}/${pkgname}"
+
+  install -Dm755 streamdeck-lets-go "${pkgdir}/usr/bin/streamdeck-lets-go"
+
+  install -Dm644 "${srcdir}/streamdeck-lets-go.service" \
+    "${pkgdir}/usr/lib/systemd/user/streamdeck-lets-go.service"
+
+  install -Dm644 "${srcdir}/90-streamdeck.rules" \
+    "${pkgdir}/usr/lib/udev/rules.d/90-streamdeck.rules"
+}

dist/arch/streamdeck-lets-go.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Stream Deck Lets Go daemon
+Documentation=https://github.com/Wakatron/streamdeck-lets-go
+After=graphical-session.target
+Wants=graphical-session.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/streamdeck-lets-go daemon
+Restart=on-failure
+RestartSec=3
+
+[Install]
+WantedBy=default.target

main.go

@@ -1,12 +1,16 @@
 package main
 
 import (
+	"bytes"
 	"context"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"log/slog"
+	"net/http"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 
 	_ "image/gif"
@@ -22,15 +26,16 @@ func main() {
 	fs := flag.NewFlagSet("streamdeck-lets-go", flag.ExitOnError)
 	configPath := fs.String("config", "", "path to config.json (default: ~/.config/streamdeck-lets-go/config.json)")
 	httpAddr := fs.String("addr", ":9090", "web UI listen address")
+	startPage := fs.String("page", "", "page to activate on startup (default: config's default_page)")
 	noDeck := fs.Bool("no-deck", false, "run without Stream Deck hardware (config editing only)")
 	verbose := fs.Bool("v", false, "verbose output")
 
-	if len(os.Args) < 2 {
+	if len(os.Args) < 2 || os.Args[1] == "--help" || os.Args[1] == "-help" || os.Args[1] == "-h" {
 		fmt.Fprintf(os.Stderr, "Usage: streamdeck-lets-go [flags] [command]\n\n")
 		fmt.Fprintf(os.Stderr, "Commands:\n")
-		fmt.Fprintf(os.Stderr, "  daemon  run the Stream Deck daemon with web UI (default)\n")
-		fmt.Fprintf(os.Stderr, "  serve   run web UI only (no deck hardware)\n")
-		fmt.Fprintf(os.Stderr, "  discover  list connected Stream Decks\n")
+		fmt.Fprintf(os.Stderr, "  daemon   run the Stream Deck daemon with web UI (default)\n")
+		fmt.Fprintf(os.Stderr, "  switch   switch running daemon to a page (e.g. 'switch games')\n")
+		fmt.Fprintf(os.Stderr, "  discover list connected Stream Decks\n")
 		fmt.Fprintf(os.Stderr, "\nFlags:\n")
 		fs.PrintDefaults()
 		os.Exit(0)
@@ -42,13 +47,26 @@ func main() {
 	switch cmd {
 	case "daemon":
 		fs.Parse(args)
-	case "serve":
+	case "switch":
 		fs.Parse(args)
-		*noDeck = true
+		if fs.NArg() == 0 {
+			fmt.Fprintf(os.Stderr, "Usage: streamdeck-lets-go switch <page>\n")
+			os.Exit(1)
+		}
+		if err := switchToPage(*httpAddr, fs.Arg(0)); err != nil {
+			fmt.Fprintf(os.Stderr, "error: %v\n", err)
+			os.Exit(1)
+		}
+		fmt.Printf("switched to page %q\n", fs.Arg(0))
+		return
 	case "discover":
 		discover()
 		return
 	default:
+		if cmd == "serve" {
+			fmt.Fprintf(os.Stderr, "streamdeck-lets-go: 'serve' removed; use 'daemon --no-deck' instead\n")
+			os.Exit(1)
+		}
 		fs.Parse(os.Args[1:])
 	}
 
@@ -71,6 +89,7 @@ func main() {
 		HTTPAddr:    *httpAddr,
 		HTTPEnabled: httpEnabled,
 		NoDeck:      *noDeck,
+		StartPage:   *startPage,
 	}); err != nil {
 		slog.Error("run", "error", err)
 		os.Exit(1)
@@ -92,3 +111,25 @@ func discover() {
 		fmt.Printf("  Serial: %s  Model: %s  PID: 0x%04x\n", d.Serial, d.Model, d.PID)
 	}
 }
+
+// switchToPage tells the running daemon (at httpAddr) to activate the given page
+// by POSTing to its /api/activate-page endpoint.
+func switchToPage(httpAddr, page string) error {
+	host := httpAddr
+	if strings.HasPrefix(host, ":") {
+		host = "127.0.0.1" + host
+	}
+	url := "http://" + host + "/api/activate-page"
+
+	body, _ := json.Marshal(map[string]string{"page": page})
+	resp, err := http.Post(url, "application/json", bytes.NewReader(body))
+	if err != nil {
+		return fmt.Errorf("daemon not running? %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("switch failed (HTTP %d)", resp.StatusCode)
+	}
+	return nil
+}