func fromHTMLToBNF(htmlFile string, w io.Writer) {
root := gs.WebPage{}.Load(htmlFile).Parse()
root.Descendants(td, class("code")).For(func(def *query.Node) {
for i, line := range def.Descendants(code, not(class("spaces"))).All() {
if i != 0 {
w.Write([]byte{'\t'})
}
if txt := line.Text(); txt != nil {
w.Write(bytes.TrimSpace([]byte(*txt)))
} else {
fmt.Sprintf("%#v", line)
}
w.Write([]byte{'\n'})
}
w.Write([]byte{'\n'})
})
}
func genErrorCodes(htmlFile string, w io.Writer) {
root := gs.WebPage{}.Load(htmlFile).Parse()
table := root.Find(id("AGuideToTheKafkaProtocol-ErrorCodes")).FindNext(class("table-wrap")).Find(tbody)
var errors []errorInfo
table.Children(tr).For(func(row *query.Node) {
cols := row.Children(td).All()
errors = append(errors, errorInfo{
name: *cols[0].PlainText(),
code: *cols[1].PlainText(),
msg: cleanMsg(*cols[2].PlainText()),
})
})
fpl(w, "package "+packageName)
fpl(w, "const (")
for _, e := range errors {
if e.code != "0" {
fp(w, "Err")
}
fp(w, e.name)
fp(w, " ErrorCode = ")
fpl(w, e.code)
}
fpl(w, ")")
fpl(w, "var errTexts = []string{")
for _, e := range errors {
if e.code != "-1" {
fp(w, e.code)
fp(w, ":")
fp(w, `"proto(`)
fp(w, e.code)
fp(w, "): ")
fp(w, e.msg)
fpl(w, `",`)
}
}
fpl(w, "}")
}