Main gpython binary - slightly working

ncw · ncw · commit 1f524540dd42 · 2013-11-15T14:52:26.000Z
diff --git a/.gitignore b/.gitignore
@@ -1 +1,5 @@
 *~
+gpython
+hello.py
+hello.pyc
+__pycache__
diff --git a/main.go b/main.go
@@ -0,0 +1,63 @@
+// Gpython binary
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	//"github.com/ncw/gpython/vm"
+	"github.com/ncw/gpython/marshal"
+	"log"
+	"strings"
+)
+
+// Globals
+var (
+	// Flags
+	debug = flag.Bool("d", false, "Print lots of debugging")
+)
+
+// syntaxError prints the syntax
+func syntaxError() {
+	fmt.Fprintf(os.Stderr, `GPython
+
+A python implementation in Go
+
+Full options:
+`)
+	flag.PrintDefaults()
+}
+
+// Exit with the message
+func fatal(message string, args ...interface{}) {
+	if !strings.HasSuffix(message, "\n") {
+		message += "\n"
+	}
+	syntaxError()
+	fmt.Fprintf(os.Stderr, message, args...)
+	os.Exit(1)
+}
+
+func main() {
+	flag.Usage = syntaxError
+	flag.Parse()
+	args := flag.Args()
+	if len(args) != 1 {
+		fatal("Need program to run")
+	}
+	prog := args[0]
+	fmt.Printf("Running %q\n", prog)
+
+	f, err := os.Open(prog)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	obj, err := marshal.ReadPyc(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(obj)
+
+}
