|
|
@@ -0,0 +1,84 @@
|
|
|
+package main
|
|
|
+
|
|
|
+import (
|
|
|
+ "bufio"
|
|
|
+ "fmt"
|
|
|
+ "log"
|
|
|
+ "os"
|
|
|
+ "strings"
|
|
|
+)
|
|
|
+
|
|
|
+type file struct {
|
|
|
+ name string
|
|
|
+ size int
|
|
|
+}
|
|
|
+
|
|
|
+type dir struct {
|
|
|
+ name string
|
|
|
+ parent *dir
|
|
|
+ dirs []dir
|
|
|
+ files []file
|
|
|
+}
|
|
|
+
|
|
|
+func cd(line string, current *dir, dirsRead map[string]*dir, root *dir) *dir {
|
|
|
+ var name string
|
|
|
+ n, err := fmt.Sscanf(line, "$ cd %s", &name)
|
|
|
+ if n != 1 || err != nil {
|
|
|
+ log.Fatal("Can't parse cd:", err)
|
|
|
+ }
|
|
|
+
|
|
|
+ if name == "/" {
|
|
|
+ current = root
|
|
|
+ } else if name == ".." {
|
|
|
+ current = current.parent
|
|
|
+ } else {
|
|
|
+ parent := current
|
|
|
+ current, _ = dirsRead[name]
|
|
|
+ if current == nil {
|
|
|
+ newDir := dir{name: name, parent: parent}
|
|
|
+ parent.dirs = append(parent.dirs, newDir)
|
|
|
+ current = &newDir
|
|
|
+ fmt.Println(name, current, newDir)
|
|
|
+ dirsRead[name] = current
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return current
|
|
|
+}
|
|
|
+
|
|
|
+func readInput(file *os.File) dir {
|
|
|
+ scanner := bufio.NewScanner(file)
|
|
|
+ root := dir{name: "/"}
|
|
|
+ dirsRead := make(map[string]*dir)
|
|
|
+ var current *dir
|
|
|
+
|
|
|
+ for scanner.Scan() {
|
|
|
+ line := scanner.Text()
|
|
|
+ if line == "" {
|
|
|
+ continue
|
|
|
+ }
|
|
|
+
|
|
|
+ if strings.HasPrefix(line, "$ cd") {
|
|
|
+ current = cd(line, current, dirsRead, &root)
|
|
|
+ fmt.Println(line, current)
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return root
|
|
|
+}
|
|
|
+
|
|
|
+func main() {
|
|
|
+ if len(os.Args) < 2 {
|
|
|
+ log.Fatal("You need to specify a file!")
|
|
|
+ }
|
|
|
+
|
|
|
+ filePath := os.Args[1]
|
|
|
+ file, err := os.Open(filePath)
|
|
|
+ if err != nil {
|
|
|
+ log.Fatalf("Failed to open %s!\n", filePath)
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ root := readInput(file)
|
|
|
+ fmt.Println(root)
|
|
|
+}
|
