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bd435c612c
Add a new toplevel `inspect` verb to the gopls command, to expose the internal state of a running gopls server. For now, this verb exposes a single subcommand `sessions`, which lists some information about current server sessions on a gopls daemon. This can be used even if the debug server is not running, which will become the default in a later CL. Updates golang/go#34111 Change-Id: Ib7d654a659fa47280584f9a7301b952cbccc565a Reviewed-on: https://go-review.googlesource.com/c/tools/+/222669 Run-TryBot: Robert Findley <rfindley@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Heschi Kreinick <heschi@google.com>
107 lines
2.6 KiB
Go
107 lines
2.6 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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"flag"
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"fmt"
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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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fmt.Printf("Server logfile: %s\n", state.Logfile)
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fmt.Printf("Server debug address: %v\n", state.DebugAddr)
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for _, c := range state.Clients {
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if c.ClientID == state.CurrentClientID {
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// This is the client for the listsessions command itself.
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continue
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}
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fmt.Println()
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fmt.Printf("Client %s:\n", c.ClientID)
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fmt.Printf("\tsession: %s:\n", c.SessionID)
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fmt.Printf("\tlogfile: %s:\n", c.Logfile)
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fmt.Printf("\tdebug address: %s:\n", c.DebugAddr)
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}
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return nil
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}
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