forked from diamondburned/arikawa
/
main.go
86 lines (67 loc) · 1.4 KB
/
main.go
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package main
import (
"bytes"
"flag"
"go/format"
"log"
"os"
"path/filepath"
"text/template"
_ "embed"
)
type data struct {
Package string
ImportDiscord bool
Snowflakes []snowflakeType
}
type snowflakeType struct {
TypeName string
}
//go:embed template.tmpl
var packageTmpl string
var tmpl = template.Must(template.New("").Parse(packageTmpl))
func main() {
var pkg string
var out string
log.SetFlags(0)
flag.Usage = func() {
log.Printf("usage: %s [-p package] <type names...>", filepath.Base(os.Args[0]))
flag.PrintDefaults()
}
flag.StringVar(&out, "o", "", "output, empty for stdout")
flag.StringVar(&pkg, "p", "discord", "package name")
flag.Parse()
if len(flag.Args()) == 0 {
flag.Usage()
os.Exit(1)
}
d := data{
Package: pkg,
ImportDiscord: pkg != "discord",
}
for _, arg := range flag.Args() {
d.Snowflakes = append(d.Snowflakes, snowflakeType{
TypeName: arg,
})
}
buf := bytes.Buffer{}
if err := tmpl.Execute(&buf, d); err != nil {
log.Fatalln("failed to execute template:", err)
}
b, err := format.Source(buf.Bytes())
if err != nil {
log.Fatalln("failed to fmt:", err)
}
outFile := os.Stdout
if out != "" {
f, err := os.Create(out)
if err != nil {
log.Fatalln("failed to create output file:", err)
}
defer f.Close()
outFile = f
}
if _, err := outFile.Write(b); err != nil {
log.Fatalln("failed to write to file:", err)
}
}