gust: introduce cli

.gitignore

···
 *.log
 *.txt
 gust
+!cmd/gust
 .envrc
 .direnv
 result

cmd/gust/main.go

···
 package main
 
 import (
+	"fmt"
 	"log"
 	"os"
 	"path/filepath"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/fsnotify/fsnotify"
+
 	"tangled.sh/oppili.bsky.social/gust"
 )
 
···
 		defer f.Close()
 	}
 
-	// Create new watcher
+	if len(os.Args) < 2 {
+		fmt.Println("Usage: gust [build|run|dump] [package path]")
+		os.Exit(1)
+	}
+
+	cmd := os.Args[1]
+
+	switch cmd {
+	case "dump":
+		gust.DefaultConfig().Dump()
+		return
+	case "build", "run":
+		pkg := "./"
+		if len(os.Args) >= 3 {
+			pkg = os.Args[2]
+		}
+		run(cmd, pkg)
+	default:
+		fmt.Printf("Unknown command: %s\n", cmd)
+		os.Exit(1)
+	}
+}
+
+func run(mode, pkg string) {
 	w, err := fsnotify.NewWatcher()
 	if err != nil {
 		log.Println(err)
···
 		log.Println(err)
 	}
 
-	m := gust.NewModel(w)
+	cfg := gust.LoadConfig()
+
+	m := gust.NewModel(w, cfg, gust.WithMode(mode), gust.WithPackage(pkg))
 
 	p := tea.NewProgram(m, tea.WithAltScreen())
 	if _, err := p.Run(); err != nil {
···
 }
 
 func watchRecursively(watcher *fsnotify.Watcher, path string) error {
-	err := filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
+	return filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}
···
 		}
 		return nil
 	})
-	return err
 }

config.go

···
 func LoadConfig() Config {
 	cfg := DefaultConfig()
 
-	if _, err := toml.DecodeFile("config.toml", &cfg); err != nil {
+	if _, err := toml.DecodeFile(".gust.toml", &cfg); err != nil {
 		fmt.Fprintf(os.Stderr, "%s", err.Error())
 	}
 

flake.nix

···
         version = "0.1.0";
         src = gitignoreSource ./.;
         subPackages = ["cmd/gust"];
-        vendorHash = "sha256-0+WwkJj/ZovrTrhPL4aimmaBfEgaIEtTt6HYDWzUIFE=";
+        vendorHash = "sha256-BXjnNZMITu8uC/B5hFv41QRXtOv5tDMBRySU4dcyu6E=";
         env.CGO_ENABLED = 0;
       };
     };