vendor dependencies

vendor/k8s.io/component-base/cli/flag/map_string_string.go

@@ -0,0 +1,112 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+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 flag
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// MapStringString can be set from the command line with the format `--flag "string=string"`.
+// Multiple flag invocations are supported. For example: `--flag "a=foo" --flag "b=bar"`. If this is desired
+// to be the only type invocation `NoSplit` should be set to true.
+// Multiple comma-separated key-value pairs in a single invocation are supported if `NoSplit`
+// is set to false. For example: `--flag "a=foo,b=bar"`.
+type MapStringString struct {
+	Map         *map[string]string
+	initialized bool
+	NoSplit     bool
+}
+
+// NewMapStringString takes a pointer to a map[string]string and returns the
+// MapStringString flag parsing shim for that map
+func NewMapStringString(m *map[string]string) *MapStringString {
+	return &MapStringString{Map: m}
+}
+
+// NewMapStringString takes a pointer to a map[string]string and sets `NoSplit`
+// value to `true` and returns the MapStringString flag parsing shim for that map
+func NewMapStringStringNoSplit(m *map[string]string) *MapStringString {
+	return &MapStringString{
+		Map:     m,
+		NoSplit: true,
+	}
+}
+
+// String implements github.com/spf13/pflag.Value
+func (m *MapStringString) String() string {
+	if m == nil || m.Map == nil {
+		return ""
+	}
+	pairs := []string{}
+	for k, v := range *m.Map {
+		pairs = append(pairs, fmt.Sprintf("%s=%s", k, v))
+	}
+	sort.Strings(pairs)
+	return strings.Join(pairs, ",")
+}
+
+// Set implements github.com/spf13/pflag.Value
+func (m *MapStringString) Set(value string) error {
+	if m.Map == nil {
+		return fmt.Errorf("no target (nil pointer to map[string]string)")
+	}
+	if !m.initialized || *m.Map == nil {
+		// clear default values, or allocate if no existing map
+		*m.Map = make(map[string]string)
+		m.initialized = true
+	}
+
+	// account for comma-separated key-value pairs in a single invocation
+	if !m.NoSplit {
+		for _, s := range strings.Split(value, ",") {
+			if len(s) == 0 {
+				continue
+			}
+			arr := strings.SplitN(s, "=", 2)
+			if len(arr) != 2 {
+				return fmt.Errorf("malformed pair, expect string=string")
+			}
+			k := strings.TrimSpace(arr[0])
+			v := strings.TrimSpace(arr[1])
+			(*m.Map)[k] = v
+		}
+		return nil
+	}
+
+	// account for only one key-value pair in a single invocation
+	arr := strings.SplitN(value, "=", 2)
+	if len(arr) != 2 {
+		return fmt.Errorf("malformed pair, expect string=string")
+	}
+	k := strings.TrimSpace(arr[0])
+	v := strings.TrimSpace(arr[1])
+	(*m.Map)[k] = v
+	return nil
+
+}
+
+// Type implements github.com/spf13/pflag.Value
+func (*MapStringString) Type() string {
+	return "mapStringString"
+}
+
+// Empty implements OmitEmpty
+func (m *MapStringString) Empty() bool {
+	return len(*m.Map) == 0
+}