mirror of https://github.com/knative/pkg.git
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
/*
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Copyright 2020 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package webhook
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import (
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"fmt"
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"os"
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"strconv"
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)
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const portEnvKey = "WEBHOOK_PORT"
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// PortFromEnv returns the webhook port set by portEnvKey, or default port if env var is not set.
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func PortFromEnv(defaultPort int) int {
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if os.Getenv(portEnvKey) == "" {
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return defaultPort
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}
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port, err := strconv.Atoi(os.Getenv(portEnvKey))
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if err != nil {
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panic(fmt.Sprintf("failed to convert the environment variable %q : %v", portEnvKey, err))
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} else if port == 0 {
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panic(fmt.Sprintf("the environment variable %q can't be zero", portEnvKey))
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}
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return port
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}
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