Add Walk

examples/directories/directories.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 )
 
 func check(e error) {
@@ -53,7 +54,7 @@ func main() {
 
 	fmt.Println("Listing subdir/parent")
 	for _, entry := range c {
-		fmt.Println(entry.Name(), entry.IsDir())
+		fmt.Println(" ", entry.Name(), entry.IsDir())
 	}
 
 	// `Chdir` lets us change the current working directory,
@@ -68,10 +69,27 @@ func main() {
 
 	fmt.Println("Listing subdir/parent/child")
 	for _, entry := range c {
-		fmt.Println(entry.Name(), entry.IsDir())
+		fmt.Println(" ", entry.Name(), entry.IsDir())
 	}
 
 	// `cd` back to where we started.
 	err = os.Chdir("../../..")
 	check(err)
+
+	// We can also visit a directory *recursively*,
+	// including all its sub-directories. `Walk` accepts
+	// a callback function to handle every file or
+	// directory visited.
+	fmt.Println("Visiting subdir")
+	err = filepath.Walk("subdir", visit)
+}
+
+// visit is called for every file or directory found
+// recursively by `filepath.Walk`.
+func visit(p string, info os.FileInfo, err error) error {
+	if err != nil {
+		return err
+	}
+	fmt.Println(" ", p, info.IsDir())
+	return nil
 }

examples/directories/directories.hash

@@ -1,2 +1,2 @@
-7b2eed223a00c8a84df582bd254a642c7a57dd9b
-UnjBL6NmR8-
+57a8f629f040270c15a0375be4424b392edf3c95
+LI7ty_KDozd

examples/directories/directories.sh

@@ -1,7 +1,15 @@
 $ go run directories.go
 Listing subdir/parent
-child true
-file2 false
-file3 false
+  child true
+  file2 false
+  file3 false
 Listing subdir/parent/child
-file4 false
+  file4 false
+Visiting subdir
+  subdir true
+  subdir/file1 false
+  subdir/parent true
+  subdir/parent/child true
+  subdir/parent/child/file4 false
+  subdir/parent/file2 false
+  subdir/parent/file3 false