Bump google.golang.org/api

vendor/github.com/google/martian/multierror.go

@@ -0,0 +1,71 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package martian
+
+import (
+	"strings"
+	"sync"
+)
+
+// MultiError is a collection of errors that implements the error interface.
+type MultiError struct {
+	mu   sync.RWMutex
+	errs []error
+}
+
+// NewMultiError returns a new MultiError.
+func NewMultiError() *MultiError {
+	return &MultiError{}
+}
+
+// Error returns the list of errors separated by newlines.
+func (merr *MultiError) Error() string {
+	merr.mu.RLock()
+	defer merr.mu.RUnlock()
+
+	var errs []string
+	for _, err := range merr.errs {
+		errs = append(errs, err.Error())
+	}
+
+	return strings.Join(errs, "\n")
+}
+
+// Errors returns the error slice containing the error collection.
+func (merr *MultiError) Errors() []error {
+	merr.mu.RLock()
+	defer merr.mu.RUnlock()
+
+	return merr.errs
+}
+
+// Add appends an error to the error collection.
+func (merr *MultiError) Add(err error) {
+	merr.mu.Lock()
+	defer merr.mu.Unlock()
+
+	// Unwrap *MultiError to ensure that depth never exceeds 1.
+	if merr2, ok := err.(*MultiError); ok {
+		merr.errs = append(merr.errs, merr2.Errors()...)
+		return
+	}
+
+	merr.errs = append(merr.errs, err)
+}
+
+// Empty returns whether the *MultiError contains any errors.
+func (merr *MultiError) Empty() bool {
+	return len(merr.errs) == 0
+}