Add --version flag and display version on startup

.env

@@ -1 +0,0 @@
-DSN=root:Maal12345678@tcp(localhost:3306)/nalu

cmd/gormcol/main.go

@@ -16,11 +16,33 @@ import (
 	"gorm.io/gorm"
 )
 
+// version returns the current version from git tag and last modification date.
+func version() string {
+	tag := "dev"
+	if out, err := exec.Command("git", "describe", "--tags", "--abbrev=0").Output(); err == nil {
+		tag = strings.TrimSpace(string(out))
+	}
+
+	date := ""
+	if out, err := exec.Command("git", "log", "-1", "--format=%ci").Output(); err == nil {
+		date = strings.TrimSpace(string(out))
+		if len(date) >= 10 {
+			date = date[:10]
+		}
+	}
+
+	if date != "" {
+		return fmt.Sprintf("%s (%s)", tag, date)
+	}
+	return tag
+}
+
 // main is the entry point for the gormcol-gen CLI tool.
 // It parses flags, loads configuration from .env, connects to the database,
 // and generates GORM models with column descriptors.
 func main() {
 
+	versionFlag := flag.Bool("version", false, "display version information")
 	dsn := flag.String("dsn", "", "database DSN (e.g. user:pass@tcp(host:3306)/dbname)")
 	filter := flag.String("filter", "", "regex to match table names (triggers batch mode)")
 	all := flag.Bool("all", false, "generate all tables matching filter (shows confirmation)")
@@ -44,7 +66,15 @@ func main() {
 
 	flag.Parse()
 
-	// Get DSN from flag or environment variable.
+	// Display version on startup.
+	fmt.Printf("gormcol %s\n", version())
+
+	// Display version if requested.
+	if *versionFlag {
+		return
+	}
+
+	// Connect to the database.
 	dsnValue := *dsn
 	if dsnValue == "" {
 		dsnValue = os.Getenv("DSN")

gencols.go

@@ -181,37 +181,6 @@ func generateColsVarBlock(si *structInfo) string {
 	return b.String()
 }
 
-// findGoMod searches upward from startDir for a go.mod file.
-func findGoMod(startDir string) (string, error) {
-	dir := startDir
-	for {
-		path := filepath.Join(dir, "go.mod")
-		if _, err := os.Stat(path); err == nil {
-			return path, nil
-		}
-		parent := filepath.Dir(dir)
-		if parent == dir {
-			return "", fmt.Errorf("go.mod not found from %s", startDir)
-		}
-		dir = parent
-	}
-}
-
-// readModulePath extracts the module path from a go.mod file.
-func readModulePath(goModPath string) (string, error) {
-	content, err := os.ReadFile(goModPath)
-	if err != nil {
-		return "", err
-	}
-	for _, line := range strings.Split(string(content), "\n") {
-		line = strings.TrimSpace(line)
-		if strings.HasPrefix(line, "module ") {
-			return strings.TrimSpace(strings.TrimPrefix(line, "module ")), nil
-		}
-	}
-	return "", fmt.Errorf("module directive not found in %s", goModPath)
-}
-
 // generateCols appends <Model>Cols variables to generated model files.
 // It parses each .go file in the output directory, extracts struct fields
 // with gorm column tags, and generates type-safe Field descriptors.
@@ -231,15 +200,7 @@ func (m *GormGen) generateCols() error {
 		return err
 	}
 
-	goModPath, err := findGoMod(absDir)
+	gormcolImport := `"git.ma-al.com/goc_marek/gormcol"`
-	if err != nil {
-		return err
-	}
-	modulePath, err := readModulePath(goModPath)
-	if err != nil {
-		return err
-	}
-	gormcolImport := fmt.Sprintf("%q", modulePath+"")
 
 	var fileFilter *regexp.Regexp
 	if len(m.cfg.SelectedTables) > 0 {