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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 (
"bufio"
"context"
"fmt"
"io"
"log"
"os"
"os/user"
"path"
"github.com/go-git/go-billy/v5/osfs"
ui "github.com/gizak/termui/v3"
"github.com/gizak/termui/v3/widgets"
"github.com/pingcap/tiup/pkg/environment"
"github.com/pingcap/tiup/pkg/localdata"
"github.com/pingcap/tiup/pkg/repository"
gops "github.com/shirou/gopsutil/process"
"github.com/spf13/cobra"
_ "github.com/xo/usql/drivers/mysql"
"github.com/xo/usql/env"
"github.com/xo/usql/handler"
"github.com/xo/usql/rline"
)
func main() {
if err := execute(); err != nil {
os.Exit(1)
}
}
func execute() error {
rootCmd := &cobra.Command{
Use: "tiup client",
Short: "Connect a TiDB cluster in your local host",
SilenceUsage: true,
RunE: func(cmd *cobra.Command, args []string) error {
target := ""
if len(args) > 0 {
target = args[0]
}
env, err := environment.InitEnv(repository.Options{}, repository.MirrorOptions{})
if err != nil {
return err
}
environment.SetGlobalEnv(env)
return connect(target)
},
PostRunE: func(cmd *cobra.Command, args []string) error {
return environment.GlobalEnv().Close()
},
}
return rootCmd.Execute()
}
func connect(target string) error {
tiupHome := os.Getenv(localdata.EnvNameHome)
if tiupHome == "" {
return fmt.Errorf("env variable %s not set, are you running client out of tiup?", localdata.EnvNameHome)
}
endpoints, err := scanEndpoint(tiupHome)
if err != nil {
return fmt.Errorf("error on read files: %s", err.Error())
}
if len(endpoints) == 0 {
return fmt.Errorf("It seems no playground is running, execute `tiup playground` to start one")
}
var ep *endpoint
if target == "" {
if ep = selectEndpoint(endpoints); ep == nil {
os.Exit(0)
}
} else {
for _, end := range endpoints {
if end.component == target {
ep = end
}
}
if ep == nil {
return fmt.Errorf("specified instance %s not found, maybe it's not alive now, execute `tiup status` to see instance list", target)
}
}
u, err := user.Current()
if err != nil {
return fmt.Errorf("can't get current user: %s", err.Error())
}
l, err := rline.New(false, false, false, "", env.HistoryFile(u))
if err != nil {
return fmt.Errorf("can't open history file: %s", err.Error())
}
dataDir := os.Getenv(localdata.EnvNameInstanceDataDir)
h := handler.New(l, u, dataDir, osfs.New(dataDir), true)
if err = h.Open(context.TODO(), ep.dsn); err != nil {
return fmt.Errorf("can't open connection to %s: %s", ep.dsn, err.Error())
}
if err = h.Run(); err != io.EOF {
return err
}
return nil
}
func scanEndpoint(tiupHome string) ([]*endpoint, error) {
endpoints := []*endpoint{}
files, err := os.ReadDir(path.Join(tiupHome, localdata.DataParentDir))
if err != nil {
return nil, err
}
for _, file := range files {
if !isInstanceAlive(tiupHome, file.Name()) {
continue
}
endpoints = append(endpoints, readDsn(path.Join(tiupHome, localdata.DataParentDir, file.Name()), file.Name())...)
}
return endpoints, nil
}
func isInstanceAlive(tiupHome, instance string) bool {
s, err := environment.GlobalEnv().Profile().ReadMetaFile(instance)
if err != nil {
return false
}
exist, _ := gops.PidExists(int32(s.Pid))
return exist
}
func readDsn(dir, component string) []*endpoint {
endpoints := []*endpoint{}
file, err := os.Open(path.Join(dir, "dsn"))
if err != nil {
return endpoints
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
endpoints = append(endpoints, &endpoint{
component: component,
dsn: scanner.Text(),
})
}
return endpoints
}
func selectEndpoint(endpoints []*endpoint) *endpoint {
if err := ui.Init(); err != nil {
log.Fatalf("failed to initialize termui: %v", err)
}
defer ui.Close()
l := widgets.NewList()
l.Title = "Choose an endpoint to connect"
ml := 0
for _, ep := range endpoints {
if ml < len(ep.component) {
ml = len(ep.component)
}
}
fmtStr := fmt.Sprintf(" %%-%ds %%s", ml)
for _, ep := range endpoints {
l.Rows = append(l.Rows, fmt.Sprintf(fmtStr, ep.component, ep.dsn))
}
l.TextStyle = ui.NewStyle(ui.ColorWhite)
l.SelectedRowStyle = ui.NewStyle(ui.ColorGreen)
l.WrapText = false
size := min(len(endpoints), 16)
l.SetRect(0, 0, 80, size+2)
ui.Render(l)
uiEvents := ui.PollEvents()
for {
e := <-uiEvents
_ = os.WriteFile("/tmp/log", []byte(e.ID+"\n"), 0664)
switch e.ID {
case "q", "<C-c>":
return nil
case "j", "<Down>":
l.ScrollDown()
case "k", "<Up>":
l.ScrollUp()
case "<Enter>":
return endpoints[l.SelectedRow]
}
ui.Render(l)
}
}
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