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// confluent-kafka-go internal tool to generate error constants from librdkafka
package main
/**
* Copyright 2016 Confluent 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.
*/
import (
"fmt"
"os"
"strings"
"time"
)
/*
#cgo pkg-config: --static rdkafka
#cgo LDFLAGS: -lrdkafka
#include <librdkafka/rdkafka.h>
static const char *errdesc_to_string (const struct rd_kafka_err_desc *ed, int idx) {
return ed[idx].name;
}
static const char *errdesc_to_desc (const struct rd_kafka_err_desc *ed, int idx) {
return ed[idx].desc;
}
*/
import "C"
func camelCase(s string) string {
ret := ""
for _, v := range strings.Split(s, "_") {
if len(v) == 0 {
continue
}
ret += strings.ToUpper((string)(v[0])) + strings.ToLower(v[1:])
}
return ret
}
func main() {
outfile := os.Args[1]
f, err := os.Create(outfile)
if err != nil {
panic(err)
}
defer f.Close()
f.WriteString("package kafka\n")
f.WriteString("// Copyright 2016 Confluent Inc.\n")
f.WriteString(fmt.Sprintf("// AUTOMATICALLY GENERATED BY %s ON %v USING librdkafka %s\n",
os.Args[0], time.Now(), C.GoString(C.rd_kafka_version_str())))
var errdescs *C.struct_rd_kafka_err_desc
var csize C.size_t
C.rd_kafka_get_err_descs(&errdescs, &csize)
f.WriteString(`
/*
#include <librdkafka/rdkafka.h>
*/
import "C"
// ErrorCode is the integer representation of local and broker error codes
type ErrorCode int
// String returns a human readable representation of an error code
func (c ErrorCode) String() string {
return C.GoString(C.rd_kafka_err2str(C.rd_kafka_resp_err_t(c)))
}
const (
`)
for i := 0; i < int(csize); i++ {
orig := C.GoString(C.errdesc_to_string(errdescs, C.int(i)))
if len(orig) == 0 {
continue
}
desc := C.GoString(C.errdesc_to_desc(errdescs, C.int(i)))
if len(desc) == 0 {
continue
}
errname := "Err" + camelCase(orig)
// Special handling to please golint
// Eof -> EOF
// Id -> ID
errname = strings.Replace(errname, "Eof", "EOF", -1)
errname = strings.Replace(errname, "Id", "ID", -1)
f.WriteString(fmt.Sprintf(" // %s %s\n", errname, desc))
f.WriteString(fmt.Sprintf(" %s ErrorCode = ErrorCode(C.RD_KAFKA_RESP_ERR_%s)\n",
errname, orig))
}
f.WriteString(")\n")
}
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