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https://github.com/golang/go
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da4261a3d0
I've been using the inspect command to find data about the daemon and its various sessions while debugging gopls. In practice, however, I don't simply want to view the debug information: I want to script it. This change removes the custom output formatting in favor of indented JSON, so that we can do things like the following: tail -f $(gopls inspect sessions | gq -r .logfile) Which tails the daemon logs for the current gopls binary version. Change-Id: I8895644b1493862f027e6c4b06e32612a4f3927d Reviewed-on: https://go-review.googlesource.com/c/tools/+/233357 Run-TryBot: Robert Findley <rfindley@google.com> Reviewed-by: Heschi Kreinick <heschi@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cmd
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import (
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"context"
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"encoding/json"
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"flag"
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"fmt"
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"log"
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"os"
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"golang.org/x/tools/internal/lsp/lsprpc"
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"golang.org/x/tools/internal/tool"
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)
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type inspect struct {
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app *Application
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}
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func (i *inspect) subCommands() []tool.Application {
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return []tool.Application{
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&listSessions{app: i.app},
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}
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}
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func (i *inspect) Name() string { return "inspect" }
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func (i *inspect) Usage() string { return "<subcommand> [args...]" }
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func (i *inspect) ShortHelp() string {
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return "inspect server state (daemon mode only)"
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}
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func (i *inspect) DetailedHelp(f *flag.FlagSet) {
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fmt.Fprint(f.Output(), "\nsubcommands:\n")
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for _, c := range i.subCommands() {
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fmt.Fprintf(f.Output(), " %s: %s\n", c.Name(), c.ShortHelp())
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}
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f.PrintDefaults()
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}
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func (i *inspect) Run(ctx context.Context, args ...string) error {
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if len(args) == 0 {
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return tool.CommandLineErrorf("must provide subcommand to %q", i.Name())
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}
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command, args := args[0], args[1:]
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for _, c := range i.subCommands() {
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if c.Name() == command {
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return tool.Run(ctx, c, args)
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}
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}
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return tool.CommandLineErrorf("unknown command %v", command)
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}
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// listSessions is an inspect subcommand to list current sessions.
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type listSessions struct {
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app *Application
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}
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func (c *listSessions) Name() string { return "sessions" }
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func (c *listSessions) Usage() string { return "" }
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func (c *listSessions) ShortHelp() string {
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return "print information about current gopls sessions"
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}
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const listSessionsExamples = `
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Examples:
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1) list sessions for the default daemon:
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$ gopls -remote=auto inspect sessions
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or just
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$ gopls inspect sessions
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2) list sessions for a specific daemon:
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$ gopls -remote=localhost:8082 inspect sessions
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`
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func (c *listSessions) DetailedHelp(f *flag.FlagSet) {
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fmt.Fprint(f.Output(), listSessionsExamples)
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f.PrintDefaults()
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}
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func (c *listSessions) Run(ctx context.Context, args ...string) error {
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remote := c.app.Remote
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if remote == "" {
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remote = "auto"
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}
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network, address := parseAddr(remote)
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state, err := lsprpc.QueryServerState(ctx, network, address)
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if err != nil {
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return err
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}
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v, err := json.MarshalIndent(state, "", "\t")
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if err != nil {
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log.Fatal(err)
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}
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os.Stdout.Write(v)
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return nil
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}
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