mirror of
https://github.com/gohugoio/hugo.git
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79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
// Copyright 2022 The Hugo Authors. All rights reserved.
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//
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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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//
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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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// Package terminal contains helper for the terminal, such as coloring output.
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package terminal
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import (
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"fmt"
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"os"
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"runtime"
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"strings"
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isatty "github.com/mattn/go-isatty"
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)
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const (
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errorColor = "\033[1;31m%s\033[0m"
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warningColor = "\033[0;33m%s\033[0m"
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noticeColor = "\033[1;36m%s\033[0m"
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)
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// PrintANSIColors returns false if NO_COLOR env variable is set,
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// else IsTerminal(f).
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func PrintANSIColors(f *os.File) bool {
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if os.Getenv("NO_COLOR") != "" {
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return false
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}
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return IsTerminal(f)
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}
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// IsTerminal return true if the file descriptor is terminal and the TERM
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// environment variable isn't a dumb one.
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func IsTerminal(f *os.File) bool {
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if runtime.GOOS == "windows" {
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return false
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}
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fd := f.Fd()
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return os.Getenv("TERM") != "dumb" && (isatty.IsTerminal(fd) || isatty.IsCygwinTerminal(fd))
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}
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// Notice colorizes the string in a noticeable color.
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func Notice(s string) string {
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return colorize(s, noticeColor)
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}
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// Error colorizes the string in a colour that grabs attention.
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func Error(s string) string {
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return colorize(s, errorColor)
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}
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// Warning colorizes the string in a colour that warns.
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func Warning(s string) string {
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return colorize(s, warningColor)
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}
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// colorize s in color.
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func colorize(s, color string) string {
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s = fmt.Sprintf(color, doublePercent(s))
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return singlePercent(s)
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}
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func doublePercent(str string) string {
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return strings.Replace(str, "%", "%%", -1)
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}
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func singlePercent(str string) string {
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return strings.Replace(str, "%%", "%", -1)
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}
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