Add file management functions

file_ops.go

@@ -0,0 +1,53 @@
+package confection2
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"path"
+)
+
+const (
+	dirPerm  = 0755
+	filePerm = 0633
+)
+
+func readFile(file string) ([]byte, error) {
+	if ok := fileExist(file); ok {
+		return ioutil.ReadFile(file)
+	}
+
+	return nil, errors.New("Config file does not exist")
+}
+
+func writeFile(file string, body []byte) error {
+	var fd *os.File
+	var err error
+	if ok := fileExist(file); !ok {
+		if err = mkdirp(file); err != nil {
+			return err
+		}
+		if fd, err = os.Create(file); err != nil {
+			return err
+		}
+	} else if fd, err = os.OpenFile(file, os.O_TRUNC|os.O_WRONLY, filePerm); err != nil {
+		return err
+	}
+	defer fd.Close()
+
+	if _, err := fd.Write(body); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func fileExist(file string) bool {
+	_, err := os.Stat(file)
+	return (err == nil)
+}
+
+func mkdirp(file string) error {
+	dir := path.Dir(file)
+	return os.MkdirAll(dir, dirPerm)
+}