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// Copyright 2016 The etcd Authors
//
// 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.
// etcdctl is a command line application that controls etcd.
package main
import (
"fmt"
"os"
"go.etcd.io/etcd/etcdctl/v3/ctlv2"
"go.etcd.io/etcd/etcdctl/v3/ctlv3"
)
const (
apiEnv = "ETCDCTL_API"
)
/*
mainWithError is fully analogous to main, but instead of signaling errors
by os.Exit, it exposes the error explicitly, such that test-logic can intercept
control to e.g. dump coverage data (even for test-for-failure scenarios).
*/
func mainWithError() error {
apiv := os.Getenv(apiEnv)
// unset apiEnv to avoid side-effect for future env and flag parsing.
os.Unsetenv(apiEnv)
if len(apiv) == 0 || apiv == "3" {
return ctlv3.Start()
}
if apiv == "2" {
return ctlv2.Start()
}
fmt.Fprintf(os.Stderr, "unsupported API version: %s\n", apiv)
return fmt.Errorf("unsupported API version: %s", apiv)
}
func main() {
apiv := os.Getenv(apiEnv)
// unset apiEnv to avoid side-effect for future env and flag parsing.
os.Unsetenv(apiEnv)
if len(apiv) == 0 || apiv == "3" {
ctlv3.MustStart()
return
}
if apiv == "2" {
ctlv2.MustStart()
return
}
fmt.Fprintf(os.Stderr, "unsupported API version: %v\n", apiv)
os.Exit(1)
}
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