/
main.go
55 lines (49 loc) · 1013 Bytes
/
main.go
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package main
import (
"flag"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
)
func isDir(name string) bool {
info, err := os.Stat(name)
if err != nil {
log.Fatal(err)
}
return info.IsDir()
}
func main() {
log.SetFlags(0)
log.SetPrefix("encodegen: ")
flag.Usage = func() {
os.Stderr.WriteString("Usage: encodgen [flags] -t T [directory]\n\nFlags:\n")
flag.PrintDefaults()
}
dst := flag.String("o", "", "output file name; default srcdir/encoding.go")
typs := flag.String("t", "", "comma-separated list of type names; required")
flag.Parse()
args := flag.Args()
if len(args) > 1 || *typs == "" {
flag.Usage()
os.Exit(2)
}
dir := "."
if len(args) > 0 {
dir = args[0]
if !isDir(dir) {
log.Fatalln(dir, "is not a directory")
}
}
code, err := Generate(dir, strings.Split(*typs, ",")...)
if err != nil {
log.Fatal(err)
}
if *dst == "" {
*dst = filepath.Join(dir, "encoding.go")
}
if err := ioutil.WriteFile(*dst, code, 0644); err != nil {
log.Fatal(err)
}
}