• willian.eth's avatar
    cmd: migrate to urfave/cli/v2 (#24751) · 52ed3570
    willian.eth authored
    This change updates our urfave/cli dependency to the v2 branch of the library.
    There are some Go API changes in cli v2:
    
    - Flag values can now be accessed using the methods ctx.Bool,
      ctx.Int, ctx.String, ... regardless of whether the flag is 'local' or
      'global'.
    
    - v2 has built-in support for flag categories. Our home-grown category
      system is removed and the categories of flags are assigned as part of
      the flag definition.
    
    For users, there is only one observable difference with cli v2: flags must now
    strictly appear before regular arguments. For example, the following command is
    now invalid:
    
       geth account import mykey.json --password file.txt
    
    Instead, the command must be invoked as follows:
    
       geth account import --password file.txt mykey.json
    52ed3570
compiler.go 1.35 KB
// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"errors"
	"fmt"
	"os"

	"github.com/ethereum/go-ethereum/cmd/evm/internal/compiler"

	"github.com/urfave/cli/v2"
)

var compileCommand = &cli.Command{
	Action:    compileCmd,
	Name:      "compile",
	Usage:     "compiles easm source to evm binary",
	ArgsUsage: "<file>",
}

func compileCmd(ctx *cli.Context) error {
	debug := ctx.Bool(DebugFlag.Name)

	if len(ctx.Args().First()) == 0 {
		return errors.New("filename required")
	}

	fn := ctx.Args().First()
	src, err := os.ReadFile(fn)
	if err != nil {
		return err
	}

	bin, err := compiler.Compile(fn, src, debug)
	if err != nil {
		return err
	}
	fmt.Println(bin)
	return nil
}