1 files changed, 37 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/go-multierror/prefix.go b/vendor/github.com/hashicorp/go-multierror/prefix.go
new file mode 100644
index 0000000..5c477ab
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-multierror/prefix.go
@@ -0,0 +1,37 @@
+package multierror
+
+import (
+        "fmt"
+
+        "github.com/hashicorp/errwrap"
+)
+
+// Prefix is a helper function that will prefix some text
+// to the given error. If the error is a multierror.Error, then
+// it will be prefixed to each wrapped error.
+//
+// This is useful to use when appending multiple multierrors
+// together in order to give better scoping.
+func Prefix(err error, prefix string) error {
+        if err == nil {
+                return nil
+        }
+
+        format := fmt.Sprintf("%s {{err}}", prefix)
+        switch err := err.(type) {
+        case *Error:
+                // Typed nils can reach here, so initialize if we are nil
+                if err == nil {
+                        err = new(Error)
+                }
+
+                // Wrap each of the errors
+                for i, e := range err.Errors {
+                        err.Errors[i] = errwrap.Wrapf(format, e)
+                }
+
+                return err
+        default:
+                return errwrap.Wrapf(format, err)
+        }
+}