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env.go
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env.go
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// Copyright 2022 Google LLC
//
// 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 env implements helper functions for dealing with environment variables.
package env
import (
"fmt"
"strings"
)
// Split splits an environment variable of the form key=value into its
// constituent key and value parts.
func Split(kv string) (string, string, error) {
k, v, ok := strings.Cut(kv, "=")
if !ok {
return "", "", fmt.Errorf("env: %q is not of form key=value", kv)
}
return k, v, nil
}
// Parse parses a list of environment variables of the form key=value into a
// map from keys to values. If a key appears multiple times, the last value of
// the key is returned.
func Parse(env []string) (map[string]string, error) {
kvs := map[string]string{}
for _, kv := range env {
k, v, err := Split(kv)
if err != nil {
return nil, err
}
kvs[k] = v
}
return kvs, nil
}