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Copy pathnotifier.go
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86 lines (76 loc) · 2.88 KB
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/*
* Minio Cloud Storage, (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"fmt"
"math"
"runtime"
"strings"
"github.com/fatih/color"
"github.com/minio/minio-xl/pkg/probe"
"github.com/olekukonko/ts"
)
// colorizeUpdateMessage - inspired from Yeoman project npm package https://github.com/yeoman/update-notifier
func colorizeUpdateMessage(updateString string) (string, *probe.Error) {
// initialize coloring
cyan := color.New(color.FgCyan, color.Bold).SprintFunc()
yellow := color.New(color.FgYellow, color.Bold).SprintfFunc()
// calculate length without color coding, due to ANSI color characters padded to actual
// string the final length is wrong than the original string length
line1Str := fmt.Sprintf(" Update available: ")
line2Str := fmt.Sprintf(" Run \"%s\" to update. ", updateString)
line1Length := len(line1Str)
line2Length := len(line2Str)
// populate lines with color coding
line1InColor := line1Str
line2InColor := fmt.Sprintf(" Run \"%s\" to update. ", cyan(updateString))
// calculate the rectangular box size
maxContentWidth := int(math.Max(float64(line1Length), float64(line2Length)))
line1Rest := maxContentWidth - line1Length
line2Rest := maxContentWidth - line2Length
terminal, err := ts.GetSize()
if err != nil {
return "", probe.NewError(err)
}
var message string
switch {
case len(line2Str) > terminal.Col():
message = "\n" + line1InColor + "\n" + line2InColor + "\n"
default:
// on windows terminal turn off unicode characters
var top, bottom, sideBar string
if runtime.GOOS == "windows" {
top = yellow("*" + strings.Repeat("*", maxContentWidth) + "*")
bottom = yellow("*" + strings.Repeat("*", maxContentWidth) + "*")
sideBar = yellow("|")
} else {
// color the rectangular box, use unicode characters here
top = yellow("┏" + strings.Repeat("━", maxContentWidth) + "┓")
bottom = yellow("┗" + strings.Repeat("━", maxContentWidth) + "┛")
sideBar = yellow("┃")
}
// fill spaces to the rest of the area
spacePaddingLine1 := strings.Repeat(" ", line1Rest)
spacePaddingLine2 := strings.Repeat(" ", line2Rest)
// construct the final message
message = "\n" + top + "\n" +
sideBar + line1InColor + spacePaddingLine1 + sideBar + "\n" +
sideBar + line2InColor + spacePaddingLine2 + sideBar + "\n" +
bottom + "\n"
}
// finally print the message
return message, nil
}