gopls/cmd/gorename/main.go

1	// Copyright 2014 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	// The gorename command performs precise type-safe renaming of
6	// identifiers in Go source code.
7	//
8	// Run with -help for usage information, or view the Usage constant in
9	// package golang.org/x/tools/refactor/rename, which contains most of
10	// the implementation.
11	package main // import "golang.org/x/tools/cmd/gorename"
12
13	import (
14	"flag"
15	"fmt"
16	"go/build"
17	"log"
18	"os"
19
20	"golang.org/x/tools/go/buildutil"
21	"golang.org/x/tools/refactor/rename"
22	)
23
24	var (
25	offsetFlag = flag.String("offset", "", "file and byte offset of identifier to be renamed, e.g. 'file.go:#123'. For use by editors.")
26	fromFlag = flag.String("from", "", "identifier to be renamed; see -help for formats")
27	toFlag = flag.String("to", "", "new name for identifier")
28	helpFlag = flag.Bool("help", false, "show usage message")
29	)
30
31	func init() {
32	flag.Var((*buildutil.TagsFlag)(&build.Default.BuildTags), "tags", buildutil.TagsFlagDoc)
33	flag.BoolVar(&rename.Force, "force", false, "proceed, even if conflicts were reported")
34	flag.BoolVar(&rename.Verbose, "v", false, "print verbose information")
35	flag.BoolVar(&rename.Diff, "d", false, "display diffs instead of rewriting files")
36	flag.StringVar(&rename.DiffCmd, "diffcmd", "diff", "diff command invoked when using -d")
37	}
38
39	func main() {
40	log.SetPrefix("gorename: ")
41	log.SetFlags(0)
42	flag.Parse()
43	if len(flag.Args()) > 0 {
44	log.Fatal("surplus arguments")
45	}
46
47	if helpFlag \|\| (offsetFlag == "" && fromFlag == "" && toFlag == "") {
48	fmt.Print(rename.Usage)
49	return
50	}
51
52	if err := rename.Main(&build.Default, offsetFlag, fromFlag, *toFlag); err != nil {
53	if err != rename.ConflictError {
54	log.Fatal(err)
55	}
56	os.Exit(1)
57	}
58	}
59

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