mirror of
https://github.com/golang/go
synced 2024-11-18 21:44:45 -07:00
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
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// Copyright 2019 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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"sort"
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"golang.org/x/tools/internal/lsp/protocol"
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"golang.org/x/tools/internal/span"
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"golang.org/x/tools/internal/tool"
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)
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// references implements the references verb for gopls
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type symbols struct {
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app *Application
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}
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func (r *symbols) Name() string { return "symbols" }
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func (r *symbols) Usage() string { return "<file>" }
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func (r *symbols) ShortHelp() string { return "display selected file's symbols" }
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func (r *symbols) DetailedHelp(f *flag.FlagSet) {
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fmt.Fprint(f.Output(), `
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Example:
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$ gopls symbols helper/helper.go
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`)
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f.PrintDefaults()
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}
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func (r *symbols) Run(ctx context.Context, args ...string) error {
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if len(args) != 1 {
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return tool.CommandLineErrorf("symbols expects 1 argument (position)")
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}
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conn, err := r.app.connect(ctx)
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if err != nil {
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return err
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}
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defer conn.terminate(ctx)
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from := span.Parse(args[0])
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p := protocol.DocumentSymbolParams{
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TextDocument: protocol.TextDocumentIdentifier{
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URI: string(from.URI()),
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},
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}
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symbols, err := conn.DocumentSymbol(ctx, &p)
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if err != nil {
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return err
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}
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for _, s := range symbols {
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fmt.Println(symbolToString(s))
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// Sort children for consistency
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sort.Slice(s.Children, func(i, j int) bool {
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return s.Children[i].Name < s.Children[j].Name
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})
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for _, c := range s.Children {
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fmt.Println("\t" + symbolToString(c))
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}
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}
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return nil
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}
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func symbolToString(symbol protocol.DocumentSymbol) string {
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r := symbol.SelectionRange
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// convert ranges to user friendly 1-based positions
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position := fmt.Sprintf("%v:%v-%v:%v",
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r.Start.Line+1,
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r.Start.Character+1,
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r.End.Line+1,
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r.End.Character+1,
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)
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return fmt.Sprintf("%s %s %s", symbol.Name, symbol.Kind, position)
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}
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