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//go:generate go run defaults.go default.json defs.go
package main //build !none
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
)
func fatal(str string, v ...interface{}) {
fmt.Fprintf(os.Stderr, str, v...)
os.Exit(1)
}
type setting struct {
Value int64 `json:"v"`
Comment string `json:"d"`
}
func main() {
if len(os.Args) < 3 {
fatal("usage %s <input> <output>\n", os.Args[0])
}
content, err := ioutil.ReadFile(os.Args[1])
if err != nil {
fatal("error reading file %v\n", err)
}
m := make(map[string]setting)
json.Unmarshal(content, &m)
filepath := filepath.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "params", os.Args[2])
output, err := os.OpenFile(filepath, os.O_RDWR|os.O_CREATE, os.ModePerm /*0777*/)
if err != nil {
fatal("error opening file for writing %v\n", err)
}
output.WriteString(`// DO NOT EDIT!!!
// AUTOGENERATED FROM generators/defaults.go
package params
import "math/big"
var (
`)
for name, setting := range m {
output.WriteString(fmt.Sprintf("%s=big.NewInt(%d) // %s\n", strings.Title(name), setting.Value, setting.Comment))
}
output.WriteString(")\n")
output.Close()
cmd := exec.Command("gofmt", "-w", filepath)
if err := cmd.Run(); err != nil {
fatal("gofmt failed: %v\n", err)
}
}
|
