create RecursiveTouch() and test

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
 /release
+/test

touchp.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"time"
+)
+
+func RecursiveTouch(name string) {
+	dirs := filepath.Dir(name)
+	os.MkdirAll(dirs, 0755)
+
+	_, err := os.Stat(name)
+	if os.IsNotExist(err) {
+		os.Create(name)
+	} else {
+		os.Chtimes(name, time.Now(), time.Now())
+	}
+}

touchp_test.go

@@ -0,0 +1,27 @@
+package main
+
+// TODO: mock the filesystem instead? http://nf.wh3rd.net/10things/#8
+
+import (
+	"os"
+	"testing"
+)
+
+const (
+	dir = "test"
+)
+
+func init() {
+	os.RemoveAll(dir)
+	os.Mkdir(dir, 0755)
+}
+
+func TestRecursiveTouchNew(t *testing.T) {
+	name := dir + "/new/file.ext"
+	RecursiveTouch(name)
+
+	_, err := os.Stat(name)
+	if err != nil {
+		t.Errorf("no such file or directory: '%v'", name)
+	}
+}