start beta versioning

main.go

@@ -13,6 +13,7 @@ import (
 	"fes/src/doc"
 	"fes/src/new"
 	"fes/src/server"
+	"fes/src/version"
 )
 
 //go:embed core/*
@@ -38,8 +39,14 @@ func main() {
 		fmt.Println("Options:")
 		flag.PrintDefaults()
 	}
+
+	showVersion := flag.Bool("version", false, "Show version and exit")
 	flag.Parse()
 
+	if *showVersion {
+		version.Version()
+	}
+
 	if *config.Color {
 		color.NoColor = true
 	}

src/ui/ui.go

@@ -2,10 +2,12 @@ package ui
 
 import (
 	"errors"
-	"fes/src/config"
 	"fmt"
 	"strings"
 
+	"fes/src/config"
+	"fes/src/version"
+
 	"github.com/fatih/color"
 )
 
@@ -28,17 +30,17 @@ func Path(path string, err error) {
 }
 
 func Warning(msg string, err error) error {
-	fmt.Printf("fes: %s: %v\n", color.MagentaString("warning"), err)
+	fmt.Printf("%s: %s: %v\n", version.PROGRAM_NAME, color.MagentaString("warning"), err)
 	return err
 }
 
 func Error(msg string, err error) error {
-	fmt.Printf("fes: %s: %v\n", color.RedString("error"), err)
+	fmt.Printf("%s: %s: %v\n", version.PROGRAM_NAME, color.RedString("error"), err)
 	return err
 }
 
 func Fatal(msg string, err error) error {
-	fmt.Printf("fes: %s: %v\n", color.RedString("fatal"), err)
+	fmt.Printf("%s: %s: %v\n", version.PROGRAM_NAME, color.RedString("fatal"), err)
 	panic(err)
 }
 

src/version/version.go

@@ -0,0 +1,15 @@
+package version
+
+import (
+	"fmt"
+	"os"
+)
+
+const PROGRAM_NAME string = "fes"
+const PROGRAM_NAME_LONG string = "fes/fSD"
+const VERSION string = "beta"
+
+func Version() {
+	fmt.Printf("%s version %s\n", PROGRAM_NAME_LONG, VERSION)
+	os.Exit(0)
+}