Compiler update (#21)

* added seperate folders for cmd packages.

* Fix netmodes in test + reverse bigint bytes

* glide get deps

* add, sub, mul, div

* booleans

* strings

* binary expressions

* if statements

* function calls

* composite literals (slice, array)

* Added lots of test cases and update readme.

cli/smartcontract/smart_contract.go

@@ -1,9 +1,14 @@
 package smartcontract
 
 import (
+	"encoding/hex"
+	"errors"
 	"fmt"
+	"io"
+	"os"
+	"strings"
 
-	"github.com/CityOfZion/neo-go/pkg/vm"
+	"github.com/CityOfZion/neo-go/pkg/vm/compiler"
 	"github.com/urfave/cli"
 )
 
@@ -17,6 +22,12 @@ func NewCommand() cli.Command {
 				Name:   "compile",
 				Usage:  "compile a smart contract to a .avm file",
 				Action: contractCompile,
+				Flags: []cli.Flag{
+					cli.StringFlag{
+						Name:  "out, o",
+						Usage: "Output of the compiled contract",
+					},
+				},
 			},
 			{
 				Name:   "opdump",
@@ -28,14 +39,40 @@ func NewCommand() cli.Command {
 }
 
 func contractCompile(ctx *cli.Context) error {
-	fmt.Println("compile")
-	return nil
+	if len(ctx.Args()) == 0 {
+		return errors.New("not enough arguments")
+	}
+
+	src := ctx.Args()[0]
+	c := compiler.New()
+	if err := c.CompileSource(src); err != nil {
+		return err
+	}
+
+	filename := strings.Split(src, ".")[0]
+	filename = filename + ".avm"
+
+	out := ctx.String("out")
+	if len(out) > 0 {
+		filename = out
+	}
+
+	f, err := os.Create(out)
+	if err != nil {
+		return err
+	}
+
+	hx := hex.EncodeToString(c.Buffer().Bytes())
+	fmt.Println(hx)
+
+	_, err = io.Copy(f, c.Buffer())
+	return err
 }
 
 func contractDumpOpcode(ctx *cli.Context) error {
 	src := ctx.Args()[0]
 
-	c := vm.NewCompiler()
+	c := compiler.New()
 	if err := c.CompileSource(src); err != nil {
 		return err
 	}