feat: add portable Windows zone manager

cmd/fancywin/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/stevec/fancywin/internal/config"
+	"github.com/stevec/fancywin/internal/platform"
+	"gopkg.in/yaml.v3"
+)
+
+const version = "0.2.1"
+
+func main() {
+	exe, err := os.Executable()
+	if err != nil {
+		fatal(err)
+	}
+	configPath := flag.String("config", config.DefaultPath(exe), "path to YAML configuration")
+	check := flag.Bool("check", false, "validate configuration and exit")
+	printDefault := flag.Bool("print-default", false, "print a default configuration and exit")
+	showVersion := flag.Bool("version", false, "print version and exit")
+	debug := flag.Bool("debug", false, "log window move and snap diagnostics")
+	flag.Parse()
+
+	if *showVersion {
+		fmt.Println("fancywin", version)
+		return
+	}
+	if *printDefault {
+		b, err := yaml.Marshal(config.Default())
+		if err != nil {
+			fatal(err)
+		}
+		_, _ = os.Stdout.Write(b)
+		return
+	}
+	cfg, err := config.Load(*configPath)
+	if err != nil {
+		fatal(fmt.Errorf("%s: %w", filepath.Clean(*configPath), err))
+	}
+	if *check {
+		fmt.Printf("configuration OK: %s\n", filepath.Clean(*configPath))
+		return
+	}
+	fmt.Printf("fancywin %s using %s\n", version, filepath.Clean(*configPath))
+	if err := platform.Run(*configPath, cfg, *debug); err != nil {
+		fatal(err)
+	}
+}
+
+func fatal(err error) { fmt.Fprintln(os.Stderr, "fancywin:", err); os.Exit(1) }