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a82500f162
ANSI colors do not work on dumb terminals, in situations when minio is running as a service under systemd. This PR ensures we turn off color in those situations.
99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015, 2016, 2017 Minio, Inc.
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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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*
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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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*/
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package cmd
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import (
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"fmt"
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"math"
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"runtime"
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"strings"
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"time"
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"github.com/cheggaaa/pb"
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humanize "github.com/dustin/go-humanize"
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)
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// prepareUpdateMessage - prepares the update message, only if a
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// newer version is available.
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func prepareUpdateMessage(downloadURL string, older time.Duration) string {
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if downloadURL == "" || older <= 0 {
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return ""
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}
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// Compute friendly duration string to indicate time
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// difference between newer and current release.
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t := time.Time{}
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newerThan := humanize.RelTime(t, t.Add(older), "ago", "")
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// Return the nicely colored and formatted update message.
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return colorizeUpdateMessage(downloadURL, newerThan)
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}
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// colorizeUpdateMessage - inspired from Yeoman project npm package https://github.com/yeoman/update-notifier
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func colorizeUpdateMessage(updateString string, newerThan string) string {
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msgLine1Fmt := " You are running an older version of Minio released %s "
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msgLine2Fmt := " Update: %s "
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// Calculate length *without* color coding: with ANSI terminal
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// color characters, the result is incorrect.
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line1Length := len(fmt.Sprintf(msgLine1Fmt, newerThan))
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line2Length := len(fmt.Sprintf(msgLine2Fmt, updateString))
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// Populate lines with color coding.
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line1InColor := fmt.Sprintf(msgLine1Fmt, colorYellowBold(newerThan))
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line2InColor := fmt.Sprintf(msgLine2Fmt, colorCyanBold(updateString))
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// calculate the rectangular box size.
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maxContentWidth := int(math.Max(float64(line1Length), float64(line2Length)))
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// termWidth is set to a default one to use when we are
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// not able to calculate terminal width via OS syscalls
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termWidth := 25
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if width, err := pb.GetTerminalWidth(); err == nil {
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termWidth = width
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}
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// Box cannot be printed if terminal width is small than maxContentWidth
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if maxContentWidth > termWidth {
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return "\n" + line1InColor + "\n" + line2InColor + "\n\n"
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}
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topLeftChar := "┏"
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topRightChar := "┓"
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bottomLeftChar := "┗"
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bottomRightChar := "┛"
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horizBarChar := "━"
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vertBarChar := "┃"
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// on windows terminal turn off unicode characters.
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if runtime.GOOS == globalWindowsOSName {
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topLeftChar = "+"
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topRightChar = "+"
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bottomLeftChar = "+"
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bottomRightChar = "+"
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horizBarChar = "-"
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vertBarChar = "|"
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}
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lines := []string{
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colorYellowBold(topLeftChar + strings.Repeat(horizBarChar, maxContentWidth) + topRightChar),
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vertBarChar + line1InColor + strings.Repeat(" ", maxContentWidth-line1Length) + vertBarChar,
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vertBarChar + line2InColor + strings.Repeat(" ", maxContentWidth-line2Length) + vertBarChar,
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colorYellowBold(bottomLeftChar + strings.Repeat(horizBarChar, maxContentWidth) + bottomRightChar),
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}
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return "\n" + strings.Join(lines, "\n") + "\n"
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}
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