172 lines
2.6 KiB
Go
172 lines
2.6 KiB
Go
package ls
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import(
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"os"
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"fmt"
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"strings"
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"regexp"
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"path"
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"vultras.su/core/cli/mtool"
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)
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var(
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listHidden bool
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args []string
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)
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var slashRegexp = regexp.MustCompile("/+")
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func IsDir(p string) (bool, error) {
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finfo, e := os.Stat(p)
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if e != nil {
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return false, e
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}
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return finfo.IsDir(), e
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}
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func ReadDir(p string) ([]os.FileInfo, error) {
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f, e := os.Open(p)
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if e != nil {
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return nil, e
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}
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l, e := f.Readdir(-1)
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if e != nil {
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return nil, e
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}
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f.Close()
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return l, nil
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}
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func
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Stat(p string) (os.FileInfo, error) {
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f, e := os.Open(p)
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if e != nil {
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return nil, e
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}
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s, e := f.Stat()
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f.Close()
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return s, nil
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}
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func findString(slice []string, val string) (int, bool) {
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for i, v := range slice {
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if v == val {
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return i, true
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}
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}
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return -1, false
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}
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func
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isHidden(p string) bool {
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if path.Base(p)[0] == '.' {
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return true
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}
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return false
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}
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func shouldList(p string) bool {
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if _, found := findString(args, p) ; found {
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return true
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}
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if !listHidden && isHidden(p) {
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return false
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}
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return true
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}
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func
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deleteExceedSlashes(p string) string {
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p = slashRegexp.ReplaceAllString(p, "/")
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if p != "/" { // Do not trim if it is root dir.
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p = strings.TrimRight(p, "/")
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}
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return p
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}
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func
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ls(p string, fold int) error {
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if !shouldList(p) {
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return nil
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}
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p = deleteExceedSlashes(p)
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isDir, e := IsDir(p)
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if e != nil {
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return e
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}
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if !isDir {
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fmt.Println(p)
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return nil
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}
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if fold>0 {
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/* It's a directory and it can be ls-ed. */
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l, e := ReadDir(p)
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if e!=nil {
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return e
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}
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for _, f := range l {
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s := p+"/"+f.Name()
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if b, _ := IsDir(s) ; b && fold!=1 {
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fmt.Println(s)
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}
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ls(s, fold-1)
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}
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} else {
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/* It's finish directory. Fold==0 or fold<0. */
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fmt.Println(p)
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}
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return nil
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}
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func Run(flagSet *mtool.Flags) {
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var foldLvl int
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flagSet.IntVar(&foldLvl, "r", 1, "List recursively with choosing deepness, can't be negative or zero.")
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flagSet.BoolVar(&listHidden, "a", false, "List hidden files.")
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flagSet.Parse()
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args = flagSet.Args()
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if foldLvl<0 {
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flagSet.Usage()
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}
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if foldLvl==0 && len(args)==0 {
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flagSet.Usage()
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}
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if len(args) == 0 {
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foldLvl -= 1
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if l, e := ReadDir(".") ; e != nil {
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fmt.Fprintf(os.Stderr, "%s.\n", e)
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} else {
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for _, f := range l {
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if !shouldList(f.Name()) {
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continue
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}
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isDir, _ := IsDir(f.Name())
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fmt.Println(f.Name())
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if isDir && foldLvl>0 {
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e := ls(f.Name(), foldLvl)
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if e!=nil {
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fmt.Fprintf(os.Stderr,
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"%s\n", e)
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}
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}
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}
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}
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} else {
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for _, p := range args {
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e := ls(p, foldLvl)
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if e != nil {
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fmt.Fprintf(os.Stderr, "%s\n", e)
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}
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}
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}
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}
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