tailscale/util/cibuild/cibuild.go

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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
// Package cibuild reports runtime CI information.
package cibuild
import "os"
// On reports whether the current binary is executing on a CI system.
func On() bool {
// CI env variable is set by GitHub.
// https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables
return os.Getenv("GITHUB_ACTIONS") != "" || os.Getenv("CI") == "true"
}