github.com/clem109/go-ethereum@v1.8.3-0.20180316121352-fe6cf00f480a/cmd/evm/compiler.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of go-ethereum.
     3  //
     4  // go-ethereum is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // go-ethereum is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU General Public License
    15  // along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package main
    18  
    19  import (
    20  	"errors"
    21  	"fmt"
    22  	"io/ioutil"
    23  
    24  	"github.com/ethereum/go-ethereum/cmd/evm/internal/compiler"
    25  
    26  	cli "gopkg.in/urfave/cli.v1"
    27  )
    28  
    29  var compileCommand = cli.Command{
    30  	Action:    compileCmd,
    31  	Name:      "compile",
    32  	Usage:     "compiles easm source to evm binary",
    33  	ArgsUsage: "<file>",
    34  }
    35  
    36  func compileCmd(ctx *cli.Context) error {
    37  	debug := ctx.GlobalBool(DebugFlag.Name)
    38  
    39  	if len(ctx.Args().First()) == 0 {
    40  		return errors.New("filename required")
    41  	}
    42  
    43  	fn := ctx.Args().First()
    44  	src, err := ioutil.ReadFile(fn)
    45  	if err != nil {
    46  		return err
    47  	}
    48  
    49  	bin, err := compiler.Compile(fn, src, debug)
    50  	if err != nil {
    51  		return err
    52  	}
    53  	fmt.Println(bin)
    54  	return nil
    55  }