Add wen cmd

cmd/wen/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+
+	"code.chimeric.al/dwrz/wen/internal/editor"
+	"code.chimeric.al/dwrz/wen/pkg/terminal"
+)
+
+func main() {
+	var log = slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
+		AddSource: true,
+		Level:     slog.LevelDebug,
+	}))
+
+	// Setup the main context.
+	// The context cancels on SIGINT or SIGTERM.
+	ctx, stop := signal.NotifyContext(
+		context.Background(),
+		syscall.SIGINT,
+		syscall.SIGTERM,
+	)
+	defer stop()
+
+	if err := run(ctx); err != nil {
+		log.Error("failed", slog.Any("error", err))
+		os.Exit(1)
+	}
+}
+
+func run(ctx context.Context) error {
+	// Setup workspace and log file.
+	cdir, err := os.UserCacheDir()
+	if err != nil {
+		return fmt.Errorf(
+			"failed to determine user cache directory: %w", err,
+		)
+	}
+	wdir := filepath.Join(cdir, "wen")
+
+	if err := os.MkdirAll(wdir, os.ModeDir|0700); err != nil {
+		return fmt.Errorf("failed to create tmp dir: %w", err)
+	}
+
+	f, err := os.Create(wdir + "/log")
+	if err != nil {
+		return fmt.Errorf("failed to create log file: %w", err)
+	}
+	defer f.Close()
+
+	var editorLog = slog.New(slog.NewTextHandler(f, &slog.HandlerOptions{
+		AddSource: true,
+		Level:     slog.LevelDebug,
+	}))
+
+	// Retrieve terminal info.
+	t, err := terminal.New(os.Stdin.Fd())
+	if err != nil {
+		return fmt.Errorf("failed to get terminal attributes: %w", err)
+	}
+
+	// Create the editor.
+	editor, err := editor.New(editor.Parameters{
+		In:       os.Stdin,
+		Log:      editorLog,
+		Out:      os.Stdout,
+		TempDir:  wdir,
+		Terminal: t,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to create editor: %w", err)
+	}
+
+	// Run the editor.
+	return editor.Run(ctx, os.Args[1:])
+}