mirror of https://github.com/knative/client.git
62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
/*
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Copyright 2024 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 environment
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import (
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"os"
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"strings"
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)
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// SupportsColor returns true if the environment supports color output.
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//
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// See NonColorRequested and ColorIsForced functions for more information.
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func SupportsColor() bool {
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color := true
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if NonColorRequested() {
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color = false
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}
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if ColorIsForced() {
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color = true
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}
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return color
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}
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// NonColorRequested returns true if the NO_COLOR environment variable is set to a
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// truthy value.
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//
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// See https://no-color.org/ for more information.
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func NonColorRequested() bool {
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return settingToBool(os.Getenv("NO_COLOR"))
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}
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// ColorIsForced returns true if the FORCE_COLOR environment variable is set to
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// a truthy value.
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//
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// See https://force-color.org/ for more information.
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func ColorIsForced() bool {
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return settingToBool(os.Getenv("FORCE_COLOR"))
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}
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func settingToBool(s string) bool {
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s = strings.ToLower(s)
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return len(s) != 0 &&
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s != "0" &&
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s != "false" &&
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s != "no" &&
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s != "off"
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}
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