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mergelabels.go
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/
mergelabels.go
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// Copyright © 2019 The Tekton 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 labels
import (
"errors"
"strings"
)
const invalidLabel = "invalid input format for label parameter: "
func MergeLabels(l map[string]string, optLabel []string) (map[string]string, error) {
labels, err := parseLabels(optLabel)
if err != nil {
return nil, err
}
if len(labels) == 0 {
return l, nil
}
if l == nil {
return labels, nil
}
for k, v := range labels {
l[k] = v
}
return l, nil
}
func parseLabels(p []string) (map[string]string, error) {
labels := map[string]string{}
for _, v := range p {
r := strings.SplitN(v, "=", 2)
if len(r) != 2 {
return nil, errors.New(invalidLabel + v)
}
labels[r[0]] = r[1]
}
return labels, nil
}