安装 1.5 时,直接覆盖 1.4.2,结果不能用了,报错:imports runtime: C source files not allowed when not using cgo or SWIG
解决方法是删掉 go 1.5……然后修复安装一遍。
优化:1、加了计时功能,纯属蛋疼。2、学到一个不占空间的 struct{},map[string]bool 改为 map[string]struct{}。
// UMU @ 2015-08-17 11:30 // Last update: 2015-08-21 17:40 package main import ( "bufio" "fmt" "os" "path" "path/filepath" "time" ) func isSourceFile(ext string) bool { var kSourceFileExts = []string{".c", ".cc", ".cpp", ".h", ".hpp", ".go", ".java"} for _, r := range kSourceFileExts { if r == ext { return true } } return false } func main() { if len(os.Args) < 2 { fmt.Println("Usage: ", os.Args[0], "[file or folder]...") return } start := time.Now() files := make(map[string]struct{}) lines := 0 for _, r := range os.Args { fi, err := os.Stat(r) if err == nil || os.IsExist(err) { if fi.IsDir() { AddDirectory(r, files) } else { AddFile(r, files) } } } for file, _ := range files { l := CountLine(file) lines += l fmt.Println(file, l) } fmt.Printf("Total lines: %d, cost %fs\n", lines, timeElapsed(start)) } func AddDirectory(name string, files map[string]struct{}) { filepath.Walk(name, func(path string, fi os.FileInfo, err error) error { if nil == fi { return err } if fi.IsDir() { return nil } AddFile(path, files) return nil }) } func AddFile(name string, files map[string]struct{}) { ext := path.Ext(name) if isSourceFile(ext) { path, err := filepath.Abs(name) if err == nil { _, exists := files[path] if exists { fmt.Println("Duplicated", path) } else { files[path] = struct{}{} fmt.Println("Add", path) } } } } func CountLine(path string) (num int) { f, err := os.Open(path) if nil != err { return } defer f.Close() s := bufio.NewScanner(f) for s.Scan() { num += 1 } return } func timeElapsed(start time.Time) float64 { dis := time.Since(start).Seconds() return dis }
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