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go/internal/lsp/cmd/links.go
Heschi Kreinick f7b8cc7bd0 internal/span,lsp: disambiguate URIs, DocumentURIs, and paths
Create a real type for protocol.DocumentURIs. Remove span.NewURI in
favor of path/URI-specific constructors. Remove span.Parse's ability to
parse URI-based spans, which appears to be totally unused.

As a consequence, we no longer mangle non-file URIs to start with
file://, and crash all over the place when one is opened.

Updates golang/go#33699.

Change-Id: Ic7347c9768e38002b4ad9c84471329d0af7d2e05
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219482
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-14 22:51:03 +00:00

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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cmd
import (
"context"
"encoding/json"
"flag"
"fmt"
"os"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/span"
"golang.org/x/tools/internal/tool"
errors "golang.org/x/xerrors"
)
// links implements the links verb for gopls.
type links struct {
JSON bool `flag:"json" help:"emit document links in JSON format"`
app *Application
}
func (l *links) Name() string { return "links" }
func (l *links) Usage() string { return "<filename>" }
func (l *links) ShortHelp() string { return "list links in a file" }
func (l *links) DetailedHelp(f *flag.FlagSet) {
fmt.Fprintf(f.Output(), `
Example: list links contained within a file:
  $ gopls links internal/lsp/cmd/check.go
gopls links flags are:
`)
f.PrintDefaults()
}
// Run finds all the links within a document
// - if -json is specified, outputs location range and uri
// - otherwise, prints the a list of unique links
func (l *links) Run(ctx context.Context, args ...string) error {
if len(args) != 1 {
return tool.CommandLineErrorf("links expects 1 argument")
}
conn, err := l.app.connect(ctx)
if err != nil {
return err
}
defer conn.terminate(ctx)
from := span.Parse(args[0])
uri := from.URI()
file := conn.AddFile(ctx, uri)
if file.err != nil {
return file.err
}
results, err := conn.DocumentLink(ctx, &protocol.DocumentLinkParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.URIFromSpanURI(uri),
},
})
if err != nil {
return errors.Errorf("%v: %v", from, err)
}
if l.JSON {
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", "\t")
return enc.Encode(results)
}
for _, v := range results {
fmt.Println(v.Target)
}
return nil
}