mirror of
https://github.com/beego/bee.git
synced 2024-11-29 16:51:28 +00:00
136 lines
3.7 KiB
Go
136 lines
3.7 KiB
Go
// Copyright 2017 bee authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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// Package dlv ...
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package dlv
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import (
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"flag"
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"fmt"
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"net"
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"os"
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"path/filepath"
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"github.com/beego/bee/cmd/commands"
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"github.com/beego/bee/cmd/commands/version"
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beeLogger "github.com/beego/bee/logger"
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"github.com/beego/bee/utils"
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"github.com/derekparker/delve/pkg/terminal"
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"github.com/derekparker/delve/service"
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"github.com/derekparker/delve/service/rpc2"
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"github.com/derekparker/delve/service/rpccommon"
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)
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var cmdDlv = &commands.Command{
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CustomFlags: true,
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UsageLine: "dlv [-package=\"\"] [-port=8181]",
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Short: "Start a debugging session using Delve",
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Long: `dlv command start a debugging session using debugging tool Delve.
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To debug your application using Delve, use: {{"$ bee dlv" | bold}}
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For more information on Delve: https://github.com/derekparker/delve
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`,
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PreRun: func(cmd *commands.Command, args []string) { version.ShowShortVersionBanner() },
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Run: runDlv,
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}
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var (
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packageName string
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port int
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)
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func init() {
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fs := flag.NewFlagSet("dlv", flag.ContinueOnError)
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fs.IntVar(&port, "port", 8181, "Port to listen to for clients")
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fs.StringVar(&packageName, "package", "", "The package to debug (Must have a main package)")
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cmdDlv.Flag = *fs
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commands.AvailableCommands = append(commands.AvailableCommands, cmdDlv)
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}
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func runDlv(cmd *commands.Command, args []string) int {
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if err := cmd.Flag.Parse(args); err != nil {
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beeLogger.Log.Fatalf("Error parsing flags: %v", err.Error())
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}
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debugname := "debug"
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addr := fmt.Sprintf("127.0.0.1:%d", port)
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return runDelve(addr, debugname)
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}
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// runDelve runs the Delve debugger server
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func runDelve(addr, debugname string) int {
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beeLogger.Log.Info("Starting Delve Debugger...")
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err := gobuild(debugname, packageName)
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if err != nil {
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beeLogger.Log.Fatalf("%v", err)
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}
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fp, err := filepath.Abs("./" + debugname)
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if err != nil {
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beeLogger.Log.Fatalf("%v", err)
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}
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defer os.Remove(fp)
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abs, err := filepath.Abs(debugname)
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if err != nil {
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beeLogger.Log.Fatalf("%v", err)
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}
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// Create and start the debugger server
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listener, err := net.Listen("tcp", addr)
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if err != nil {
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beeLogger.Log.Fatalf("Could not start listener: %s", err)
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}
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defer listener.Close()
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server := rpccommon.NewServer(&service.Config{
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Listener: listener,
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AcceptMulti: true,
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AttachPid: 0,
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APIVersion: 2,
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WorkingDir: "./",
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ProcessArgs: []string{abs},
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}, false)
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if err := server.Run(); err != nil {
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beeLogger.Log.Fatalf("Could not start debugger server: %v", err)
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}
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// Start the Delve client REPL
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client := rpc2.NewClient(addr)
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term := terminal.New(client, nil)
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status, err := term.Run()
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if err != nil {
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beeLogger.Log.Fatalf("Could not start Delve REPL: %v", err)
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}
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defer term.Close()
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// Stop and kill the debugger server once
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// user quits the REPL
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if err := server.Stop(true); err != nil {
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beeLogger.Log.Fatalf("Could not stop Delve server: %v", err)
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}
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return status
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}
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// gobuild runs the "go build" command on the specified package
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func gobuild(debugname, pkg string) error {
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args := []string{"-gcflags", "-N -l", "-o", debugname}
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args = append(args, utils.SplitQuotedFields("-ldflags='-linkmode internal'")...)
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args = append(args, pkg)
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return utils.GoCommand("build", args...)
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}
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