package main import ( "bufio" "bytes" "context" "flag" "fmt" "strings" "os" "git.defalsify.org/festive/engine" ) func main() { var dir string var root string flag.StringVar(&dir, "d", ".", "resource dir to read from") flag.StringVar(&root, "root", "root", "entry point symbol") flag.Parse() fmt.Fprintf(os.Stderr, "starting session at symbol '%s' using resource dir: %s\n", root, dir) ctx := context.Background() en := engine.NewDefaultEngine(dir) err := en.Init(root, ctx) if err != nil { fmt.Fprintf(os.Stderr, "cannot init: %v\n", err) os.Exit(1) } running := true for running { reader := bufio.NewReader(os.Stdin) in, err := reader.ReadString('\n') if err != nil { fmt.Fprintf(os.Stderr, "cannot read input: %v\n", err) os.Exit(1) } in = strings.TrimSpace(in) err = en.Exec([]byte(in), ctx) if err != nil { fmt.Fprintf(os.Stderr, "execution terminated: %v\n", err) os.Exit(1) } b := bytes.NewBuffer(nil) en.WriteResult(b) fmt.Println(b.String()) } }