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https://github.com/golang/go
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20805546e7
This change adds command line support for highlight. Provided with an identifier position, it will display the list of highlights for that within the same file. Example: $ gopls highlight ~/tmp/foo/main.go:3:9 $ $ 3:9-6:0 $ 10:22-11:32 $ 12:10-12:9 $ 12:20-30:0 Updates golang/go#32875 Change-Id: I5de73d9fbd9bcc59a3f62e7e9a1331bc3866bc75 Reviewed-on: https://go-review.googlesource.com/c/tools/+/207291 Run-TryBot: Rebecca Stambler <rstambler@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
82 lines
1.8 KiB
Go
82 lines
1.8 KiB
Go
// 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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"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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// highlight implements the highlight verb for gopls
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type highlight struct {
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app *Application
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}
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func (r *highlight) Name() string { return "highlight" }
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func (r *highlight) Usage() string { return "<position>" }
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func (r *highlight) ShortHelp() string { return "display selected identifier's highlights" }
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func (r *highlight) DetailedHelp(f *flag.FlagSet) {
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fmt.Fprint(f.Output(), `
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Example:
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$ # 1-indexed location (:line:column or :#offset) of the target identifier
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$ gopls highlight helper/helper.go:8:6
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$ gopls highlight helper/helper.go:#53
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gopls highlight flags are:
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`)
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f.PrintDefaults()
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}
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func (r *highlight) Run(ctx context.Context, args ...string) error {
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if len(args) != 1 {
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return tool.CommandLineErrorf("highlight 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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file := conn.AddFile(ctx, from.URI())
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if file.err != nil {
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return file.err
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}
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loc, err := file.mapper.Location(from)
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if err != nil {
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return err
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}
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p := protocol.DocumentHighlightParams{
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TextDocumentPositionParams: protocol.TextDocumentPositionParams{
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TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
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Position: loc.Range.Start,
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},
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}
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highlights, err := conn.DocumentHighlight(ctx, &p)
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if err != nil {
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return err
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}
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for _, h := range highlights {
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l := protocol.Location{Range: h.Range}
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s, err := file.mapper.Span(l)
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if err != nil {
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return err
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}
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fmt.Println(s)
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}
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return nil
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}
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