github.com/april1989/origin-go-tools@v0.0.32/internal/lsp/cmd/prepare_rename.go (about) 1 // Copyright 2019 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package cmd 6 7 import ( 8 "context" 9 "flag" 10 "fmt" 11 12 "github.com/april1989/origin-go-tools/internal/lsp/protocol" 13 "github.com/april1989/origin-go-tools/internal/span" 14 "github.com/april1989/origin-go-tools/internal/tool" 15 errors "golang.org/x/xerrors" 16 ) 17 18 // prepareRename implements the prepare_rename verb for gopls. 19 type prepareRename struct { 20 app *Application 21 } 22 23 func (r *prepareRename) Name() string { return "prepare_rename" } 24 func (r *prepareRename) Usage() string { return "<position>" } 25 func (r *prepareRename) ShortHelp() string { return "test validity of a rename operation at location" } 26 func (r *prepareRename) DetailedHelp(f *flag.FlagSet) { 27 fmt.Fprint(f.Output(), ` 28 Example: 29 30 $ # 1-indexed location (:line:column or :#offset) of the target identifier 31 $ gopls prepare_rename helper/helper.go:8:6 32 $ gopls prepare_rename helper/helper.go:#53 33 34 gopls prepare_rename flags are: 35 `) 36 f.PrintDefaults() 37 } 38 39 // ErrInvalidRenamePosition is returned when prepareRename is run at a position that 40 // is not a candidate for renaming. 41 var ErrInvalidRenamePosition = errors.New("request is not valid at the given position") 42 43 func (r *prepareRename) Run(ctx context.Context, args ...string) error { 44 if len(args) != 1 { 45 return tool.CommandLineErrorf("prepare_rename expects 1 argument (file)") 46 } 47 48 conn, err := r.app.connect(ctx) 49 if err != nil { 50 return err 51 } 52 defer conn.terminate(ctx) 53 54 from := span.Parse(args[0]) 55 file := conn.AddFile(ctx, from.URI()) 56 if file.err != nil { 57 return file.err 58 } 59 loc, err := file.mapper.Location(from) 60 if err != nil { 61 return err 62 } 63 p := protocol.PrepareRenameParams{ 64 TextDocumentPositionParams: protocol.TextDocumentPositionParams{ 65 TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI}, 66 Position: loc.Range.Start, 67 }, 68 } 69 result, err := conn.PrepareRename(ctx, &p) 70 if err != nil { 71 return errors.Errorf("prepare_rename failed: %w", err) 72 } 73 if result == nil { 74 return ErrInvalidRenamePosition 75 } 76 77 l := protocol.Location{Range: *result} 78 s, err := file.mapper.Span(l) 79 if err != nil { 80 return err 81 } 82 83 fmt.Println(s) 84 return nil 85 }