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root.go
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root.go
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// Copyright 2020 ConsenSys Software Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package cmd is the CLI interface for goff
package cmd
import (
"fmt"
"math/bits"
"os"
"path/filepath"
"strings"
"github.com/consensys/gnark-crypto/field/generator"
field "github.com/consensys/gnark-crypto/field/generator/config"
"github.com/spf13/cobra"
)
var rootCmd = &cobra.Command{
Use: "goff",
Short: "goff generates arithmetic operations for any moduli",
Run: cmdGenerate,
Version: Version,
}
// flags
var (
fModulus string
fOutputDir string
fPackageName string
fElementName string
)
func init() {
cobra.OnInitialize()
rootCmd.PersistentFlags().StringVarP(&fElementName, "element", "e", "", "name of the generated struct and file")
rootCmd.PersistentFlags().StringVarP(&fModulus, "modulus", "m", "", "field modulus (base 10)")
rootCmd.PersistentFlags().StringVarP(&fOutputDir, "output", "o", "", "destination path to create output files")
rootCmd.PersistentFlags().StringVarP(&fPackageName, "package", "p", "", "package name in generated files")
if bits.UintSize != 64 {
panic("goff only supports 64bits architectures")
}
}
func cmdGenerate(cmd *cobra.Command, args []string) {
fmt.Println()
fmt.Println("running goff version", Version)
fmt.Println()
// parse flags
if err := parseFlags(cmd); err != nil {
_ = cmd.Usage()
fmt.Printf("\n%s\n", err.Error())
os.Exit(-1)
}
// generate code
F, err := field.NewFieldConfig(fPackageName, fElementName, fModulus, false)
if err != nil {
fmt.Printf("\n%s\n", err.Error())
os.Exit(-1)
}
if err := generator.GenerateFF(F, fOutputDir); err != nil {
fmt.Printf("\n%s\n", err.Error())
os.Exit(-1)
}
}
func parseFlags(cmd *cobra.Command) error {
if fModulus == "" ||
fOutputDir == "" ||
fPackageName == "" ||
fElementName == "" {
return errMissingArgument
}
// clean inputs
fOutputDir = filepath.Clean(fOutputDir)
fPackageName = strings.ToLower(fPackageName)
return nil
}
// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
if err := rootCmd.Execute(); err != nil {
fmt.Println(err)
os.Exit(1)
}
}