feat: v2 (#599)

Read https://github.com/filebrowser/filebrowser/pull/575.

Former-commit-id: 7aedcaaf72b863033e3f089d6df308d41a3fd00c [formerly bdbe4d49161b901c4adf9c245895a1be2d62e4a7] [formerly acfc1ec67c423e0b3e065a8c1f8897c5249af65b [formerly d309066def]]
Former-commit-id: 0c7d925a38a68ccabdf2c4bbd8c302ee89b93509 [formerly a6173925a1382955d93b334ded93f70d6dddd694]
Former-commit-id: e032e0804dd051df86f42962de2b39caec5318b7

fileutils/file.go

@@ -0,0 +1,51 @@
+package fileutils
+
+import (
+	"io"
+	"path/filepath"
+
+	"github.com/spf13/afero"
+)
+
+// CopyFile copies a file from source to dest and returns
+// an error if any.
+func CopyFile(fs afero.Fs, source string, dest string) error {
+	// Open the source file.
+	src, err := fs.Open(source)
+	if err != nil {
+		return err
+	}
+	defer src.Close()
+
+	// Makes the directory needed to create the dst
+	// file.
+	err = fs.MkdirAll(filepath.Dir(dest), 0666)
+	if err != nil {
+		return err
+	}
+
+	// Create the destination file.
+	dst, err := fs.Create(dest)
+	if err != nil {
+		return err
+	}
+	defer dst.Close()
+
+	// Copy the contents of the file.
+	_, err = io.Copy(dst, src)
+	if err != nil {
+		return err
+	}
+
+	// Copy the mode if the user can't
+	// open the file.
+	info, err := fs.Stat(source)
+	if err != nil {
+		err = fs.Chmod(dest, info.Mode())
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}