blob: bb5b1c24edbba182a08724fae29a37b490aaf5a7 [file] [log] [blame]
// 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"
"flag"
"fmt"
"sort"
"golang.org/x/tools/gopls/internal/lsp/protocol"
"golang.org/x/tools/gopls/internal/span"
"golang.org/x/tools/internal/tool"
)
// implementation implements the implementation verb for gopls
type implementation struct {
app *Application
}
func (i *implementation) Name() string { return "implementation" }
func (i *implementation) Parent() string { return i.app.Name() }
func (i *implementation) Usage() string { return "<position>" }
func (i *implementation) ShortHelp() string { return "display selected identifier's implementation" }
func (i *implementation) DetailedHelp(f *flag.FlagSet) {
fmt.Fprint(f.Output(), `
Example:
$ # 1-indexed location (:line:column or :#offset) of the target identifier
$ gopls implementation helper/helper.go:8:6
$ gopls implementation helper/helper.go:#53
`)
printFlagDefaults(f)
}
func (i *implementation) Run(ctx context.Context, args ...string) error {
if len(args) != 1 {
return tool.CommandLineErrorf("implementation expects 1 argument (position)")
}
conn, err := i.app.connect(ctx)
if err != nil {
return err
}
defer conn.terminate(ctx)
from := span.Parse(args[0])
file := conn.openFile(ctx, from.URI())
if file.err != nil {
return file.err
}
loc, err := file.mapper.SpanLocation(from)
if err != nil {
return err
}
p := protocol.ImplementationParams{
TextDocumentPositionParams: protocol.LocationTextDocumentPositionParams(loc),
}
implementations, err := conn.Implementation(ctx, &p)
if err != nil {
return err
}
var spans []string
for _, impl := range implementations {
f := conn.openFile(ctx, fileURI(impl.URI))
span, err := f.mapper.LocationSpan(impl)
if err != nil {
return err
}
spans = append(spans, fmt.Sprint(span))
}
sort.Strings(spans)
for _, s := range spans {
fmt.Println(s)
}
return nil
}