| // 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" |
| "io/ioutil" |
| "os" |
| "path/filepath" |
| "sort" |
| |
| "golang.org/x/tools/internal/lsp/diff" |
| "golang.org/x/tools/internal/lsp/protocol" |
| "golang.org/x/tools/internal/lsp/source" |
| "golang.org/x/tools/internal/span" |
| "golang.org/x/tools/internal/tool" |
| errors "golang.org/x/xerrors" |
| ) |
| |
| // rename implements the rename verb for gopls. |
| type rename struct { |
| Diff bool `flag:"d" help:"display diffs instead of rewriting files"` |
| Write bool `flag:"w" help:"write result to (source) file instead of stdout"` |
| |
| app *Application |
| } |
| |
| func (r *rename) Name() string { return "rename" } |
| func (r *rename) Usage() string { return "<position>" } |
| func (r *rename) ShortHelp() string { return "rename selected identifier" } |
| func (r *rename) DetailedHelp(f *flag.FlagSet) { |
| fmt.Fprint(f.Output(), ` |
| Example: |
| |
| $ # 1-based location (:line:column or :#position) of the thing to change |
| $ gopls rename helper/helper.go:8:6 |
| $ gopls rename helper/helper.go:#53 |
| |
| gopls rename flags are: |
| `) |
| f.PrintDefaults() |
| } |
| |
| // Run renames the specified identifier and either; |
| // - if -w is specified, updates the file(s) in place; |
| // - if -d is specified, prints out unified diffs of the changes; or |
| // - otherwise, prints the new versions to stdout. |
| func (r *rename) Run(ctx context.Context, args ...string) error { |
| if len(args) != 2 { |
| return tool.CommandLineErrorf("definition expects 2 arguments (position, new name)") |
| } |
| conn, err := r.app.connect(ctx) |
| if err != nil { |
| return err |
| } |
| defer conn.terminate(ctx) |
| |
| from := span.Parse(args[0]) |
| file := conn.AddFile(ctx, from.URI()) |
| if file.err != nil { |
| return file.err |
| } |
| |
| loc, err := file.mapper.Location(from) |
| if err != nil { |
| return err |
| } |
| |
| p := protocol.RenameParams{ |
| TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI}, |
| Position: loc.Range.Start, |
| NewName: args[1], |
| } |
| we, err := conn.Rename(ctx, &p) |
| if err != nil { |
| return err |
| } |
| |
| // Make output order predictable |
| var keys []string |
| for u := range *we.Changes { |
| keys = append(keys, u) |
| } |
| sort.Strings(keys) |
| changeCount := len(keys) |
| |
| for _, u := range keys { |
| edits := (*we.Changes)[u] |
| uri := span.NewURI(u) |
| cmdFile := conn.AddFile(ctx, uri) |
| filename := cmdFile.uri.Filename() |
| |
| // convert LSP-style edits to []diff.TextEdit cuz Spans are handy |
| renameEdits, err := source.FromProtocolEdits(cmdFile.mapper, edits) |
| if err != nil { |
| return errors.Errorf("%v: %v", edits, err) |
| } |
| |
| newContent := diff.ApplyEdits(string(cmdFile.mapper.Content), renameEdits) |
| |
| switch { |
| case r.Write: |
| fmt.Fprintln(os.Stderr, filename) |
| err := os.Rename(filename, filename+".orig") |
| if err != nil { |
| return errors.Errorf("%v: %v", edits, err) |
| } |
| ioutil.WriteFile(filename, []byte(newContent), 0644) |
| case r.Diff: |
| diffs := diff.ToUnified(filename+".orig", filename, string(cmdFile.mapper.Content), renameEdits) |
| fmt.Print(diffs) |
| default: |
| if len(keys) > 1 { |
| fmt.Printf("%s:\n", filepath.Base(filename)) |
| } |
| fmt.Print(string(newContent)) |
| if changeCount > 1 { // if this wasn't last change, print newline |
| fmt.Println() |
| } |
| changeCount -= 1 |
| } |
| } |
| return nil |
| } |