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// Copyright 2020 PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"os"
"path/filepath"
"github.com/pingcap/errors"
)
// targetTag find the target playground we want to send the command.
// first try the tag of current instance, then find the first playground.
// so, if running multi playground, you must specify the tag to send the command to.
// note the flowing two instance will use two different tag.
// 1. tiup playground
// 2. tiup playground display
func targetTag() (port int, err error) {
port, err = loadPort(dataDir)
if err == nil {
return port, nil
}
err = nil
_ = filepath.Walk(filepath.Dir(dataDir), func(path string, info os.FileInfo, err error) error {
if port != 0 {
return filepath.SkipDir
}
// ignore error
if err != nil {
return nil
}
if !info.IsDir() {
return nil
}
port, _ = loadPort(path)
return nil
})
if port == 0 {
return 0, errors.Errorf("no playground running")
}
return
}
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