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env_container.go
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/
env_container.go
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// Copyright 2020-2024 Buf Technologies, Inc.
//
// 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 app
import (
"errors"
"strings"
)
type envContainer struct {
variables map[string]string
}
func newEnvContainer(m map[string]string) *envContainer {
variables := make(map[string]string)
for key, value := range m {
if value != "" {
variables[key] = value
}
}
return &envContainer{
variables: variables,
}
}
func newEnvContainerForEnviron(environ []string) (*envContainer, error) {
variables := make(map[string]string, len(environ))
for _, elem := range environ {
if !strings.ContainsRune(elem, '=') {
// Do not print out as we don't want to mistakenly leak a secure environment variable
return nil, errors.New("environment variable does not contain =")
}
split := strings.SplitN(elem, "=", 2)
if len(split) != 2 {
// Do not print out as we don't want to mistakenly leak a secure environment variable
return nil, errors.New("unknown environment split")
}
if split[1] != "" {
variables[split[0]] = split[1]
}
}
return &envContainer{
variables: variables,
}, nil
}
func (e *envContainer) Env(key string) string {
return e.variables[key]
}
func (e *envContainer) ForEachEnv(f func(string, string)) {
for key, value := range e.variables {
// This should be done anyways but just to make sure
if value != "" {
f(key, value)
}
}
}
func (e *envContainer) Size() int {
return len(e.variables)
}