github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/tools/cmd/gorename/main.go (about)

     1  // The gorename command performs precise type-safe renaming of
     2  // identifiers in Go source code.
     3  //
     4  // Run with -help for usage information, or view the Usage constant in
     5  // package golang.org/x/tools/refactor/rename, which contains most of
     6  // the implementation.
     7  //
     8  package main // import "golang.org/x/tools/cmd/gorename"
     9  
    10  import (
    11  	"flag"
    12  	"fmt"
    13  	"go/build"
    14  	"log"
    15  	"os"
    16  
    17  	"golang.org/x/tools/go/buildutil"
    18  	"golang.org/x/tools/refactor/rename"
    19  )
    20  
    21  var (
    22  	offsetFlag = flag.String("offset", "", "file and byte offset of identifier to be renamed, e.g. 'file.go:#123'.  For use by editors.")
    23  	fromFlag   = flag.String("from", "", "identifier to be renamed; see -help for formats")
    24  	toFlag     = flag.String("to", "", "new name for identifier")
    25  	helpFlag   = flag.Bool("help", false, "show usage message")
    26  )
    27  
    28  func init() {
    29  	flag.Var((*buildutil.TagsFlag)(&build.Default.BuildTags), "tags", buildutil.TagsFlagDoc)
    30  	flag.BoolVar(&rename.Force, "force", false, "proceed, even if conflicts were reported")
    31  	flag.BoolVar(&rename.Verbose, "v", false, "print verbose information")
    32  	flag.BoolVar(&rename.Diff, "d", false, "display diffs instead of rewriting files")
    33  	flag.StringVar(&rename.DiffCmd, "diffcmd", "diff", "diff command invoked when using -d")
    34  }
    35  
    36  func main() {
    37  	log.SetPrefix("gorename: ")
    38  	log.SetFlags(0)
    39  	flag.Parse()
    40  	if len(flag.Args()) > 0 {
    41  		log.Fatal("surplus arguments")
    42  	}
    43  
    44  	if *helpFlag || (*offsetFlag == "" && *fromFlag == "" && *toFlag == "") {
    45  		fmt.Println(rename.Usage)
    46  		return
    47  	}
    48  
    49  	if err := rename.Main(&build.Default, *offsetFlag, *fromFlag, *toFlag); err != nil {
    50  		if err != rename.ConflictError {
    51  			log.Fatal(err)
    52  		}
    53  		os.Exit(1)
    54  	}
    55  }