code review 5416060: io: new FileInfo, FileMode types + update tree

src/cmd/godoc/codewalk.go

 // Copyright 2010 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.
 
 // The /doc/codewalk/ tree is synthesized from codewalk descriptions,
 // files named $GOROOT/doc/codewalk/*.xml.
 // For an example and a description of the format, see
 // http://golang.org/doc/codewalk/codewalk or run godoc -http=:6060
 // and see http://localhost:6060/doc/codewalk/codewalk .
 // That page is itself a codewalk; the source code for it is
@@ skipping 23 matching lines @@
         abspath := absolutePath(r.URL.Path[1:], *goroot)
 
         r.ParseForm()
         if f := r.FormValue("fileprint"); f != "" {
                 codewalkFileprint(w, r, f)
                 return
         }
 
         // If directory exists, serve list of code walks.
         dir, err := fs.Lstat(abspath)
-        if err == nil && dir.Mode().IsDir() {
+        if err == nil && dir.IsDir() {
                 codewalkDir(w, r, relpath, abspath)
                 return
         }
 
         // If file exists, serve using standard file server.
         if err == nil {
                 serveFile(w, r)
                 return
         }
 
@@ skipping 124 matching lines @@
 
         dir, err := fs.ReadDir(abspath)
         if err != nil {
                 log.Print(err)
                 serveError(w, r, relpath, err)
                 return
         }
         var v []interface{}
         for _, fi := range dir {
                 name := fi.Name()
-                if fi.Mode().IsDir() {
+                if fi.IsDir() {
                         v = append(v, &elem{name + "/", ""})
                 } else if strings.HasSuffix(name, ".xml") {
                         cw, err := loadCodewalk(abspath + "/" + name)
                         if err != nil {
                                 continue
                         }
                         v = append(v, &elem{name[0 : len(name)-len(".xml")], cw.Title})
                 }
         }
 
@@ skipping 278 matching lines @@
         for j, c := range data {
                 if j == i {
                         return l
                 }
                 if c == '\n' {
                         l++
                 }
         }
         return l
 }