1 | package main |
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2 | |||
3 | import ( |
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4 | "fmt" |
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5 | "io" |
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6 | "os" |
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7 | |||
8 | "github.com/fatih/color" |
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9 | "github.com/mattn/go-colorable" |
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10 | "github.com/mattn/go-isatty" |
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11 | ) |
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12 | |||
13 | var ( |
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14 | Stdout = colorable.NewColorableStdout() |
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15 | Stderr = colorable.NewColorableStderr() |
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16 | Default UI = Console{Stdout: Stdout, Stderr: Stderr} |
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17 | ) |
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18 | |||
19 | type UI interface { |
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20 | Printf(format string, a ...interface{}) (n int, err error) |
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21 | Println(a ...interface{}) (n int, err error) |
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22 | Errorf(format string, a ...interface{}) (n int, err error) |
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23 | Errorln(a ...interface{}) (n int, err error) |
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24 | } |
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25 | |||
26 | func Printf(format string, a ...interface{}) (n int, err error) { |
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27 | return Default.Printf(color.CyanString("INFO: ")+format, a...) |
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28 | } |
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29 | |||
30 | func Errorf(format string, a ...interface{}) (n int, err error) { |
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31 | return Default.Errorf(color.RedString("ERROR: ")+format, a...) |
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32 | } |
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33 | |||
34 | func Warnf(format string, a ...interface{}) (n int, err error) { |
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35 | return Default.Errorf(color.YellowString("WARN: ")+format, a...) |
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36 | } |
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37 | |||
38 | func Errorln(a ...interface{}) (n int, err error) { |
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39 | return Default.Errorln(a...) |
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40 | } |
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41 | |||
42 | func IsTerminal(f *os.File) bool { |
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43 | return isatty.IsTerminal(f.Fd()) |
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44 | } |
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45 | |||
46 | type Console struct { |
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47 | Stdout io.Writer |
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48 | Stderr io.Writer |
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49 | } |
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50 | |||
51 | func (c Console) Printf(format string, a ...interface{}) (n int, err error) { |
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52 | return fmt.Fprintf(c.Stdout, format, a...) |
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53 | } |
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54 | |||
55 | func (c Console) Println(a ...interface{}) (n int, err error) { |
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56 | return fmt.Fprintln(c.Stdout, a...) |
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57 | } |
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58 | |||
59 | func (c Console) Errorf(format string, a ...interface{}) (n int, err error) { |
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60 | return fmt.Fprintf(c.Stderr, format, a...) |
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61 | } |
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62 | |||
63 | func (c Console) Errorln(a ...interface{}) (n int, err error) { |
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64 | return fmt.Fprintln(c.Stderr, a...) |
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65 | } |
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66 |