[bug] color.Output has indent error when using tabwriter.Writer

[fanybook]

Env:
OS: windows 10
go: 1.17.2
bash: cmd powershell gitbash

package main

import (
    "fmt"
    "github.com/fatih/color"
    "io"
    "text/tabwriter"
)

func main() {
    tabOut := getTabOutWithWriter(color.Output)
    fmt.Fprint(tabOut, "\x1b[0;32m  demo\t\tStart the server\n\x1b[0m")
    fmt.Fprint(tabOut, "\x1b[0;32m  help\t\tHelp about any command\n\x1b[0m")
    fmt.Fprint(tabOut, "\x1b[0;32m  server:start\t\tStart the server\n\x1b[0m")
    tabOut.Flush()
}

func getTabOutWithWriter(writer io.Writer) *tabwriter.Writer {
    aTabOut := new(tabwriter.Writer)
    aTabOut.Init(writer, 0, 8, 1, '\t', 0)
    return aTabOut
}

Output:

  demo                          Start the server
  help                  Help about any command
  server:start          Start the server

[montanaflynn]

Just ran into the same thing, did you end up solving it?

I tried both color.RedString and color.New(color.FgRed).SprintFunc() with no luck...

Before using color:

After:

Edit: I think this is actually a text/tabwriter problem because the same issue when just using color codes directly:

		colorReset := "\033[0m"
		colorRed := "\033[31m"
		colorGreen := "\033[32m"
		colorYellow := "\033[33m"

[rmsrob]

for me this fix works

w.Init(os.Stdout, 0, 8, 4, ' ', 0)

[FollowTheProcess]

It's an issue with tabwriter because the escape sequences aren't always the same length, they get used as part of the cell width calculations so some cells appear wider than they are really and don't render correctly

See https://stackoverflow.com/questions/35398497/how-do-i-get-colors-to-work-with-golang-tabwriter

color could pad the escape sequences to ensure they are all the same length as per the answer in the SO thread above but I suspect it's much trickier and more nuanced than that in practice and there will be a bunch of edge cases that need to be handled