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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
122 lines
2.0 KiB
Go
122 lines
2.0 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package log
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import (
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"fmt"
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"strconv"
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)
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const escape = "\033"
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// ColorAttribute defines a single SGR Code
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type ColorAttribute int
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// Base ColorAttributes
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const (
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Reset ColorAttribute = iota
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Bold
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Faint
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Italic
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Underline
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BlinkSlow
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BlinkRapid
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ReverseVideo
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Concealed
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CrossedOut
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)
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// Foreground text colors
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const (
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FgBlack ColorAttribute = iota + 30
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FgRed
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FgGreen
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FgYellow
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FgBlue
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FgMagenta
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FgCyan
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FgWhite
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)
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// Foreground Hi-Intensity text colors
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const (
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FgHiBlack ColorAttribute = iota + 90
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FgHiRed
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FgHiGreen
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FgHiYellow
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FgHiBlue
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FgHiMagenta
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FgHiCyan
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FgHiWhite
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)
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// Background text colors
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const (
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BgBlack ColorAttribute = iota + 40
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BgRed
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BgGreen
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BgYellow
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BgBlue
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BgMagenta
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BgCyan
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BgWhite
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)
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// Background Hi-Intensity text colors
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const (
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BgHiBlack ColorAttribute = iota + 100
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BgHiRed
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BgHiGreen
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BgHiYellow
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BgHiBlue
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BgHiMagenta
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BgHiCyan
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BgHiWhite
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)
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var (
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resetBytes = ColorBytes(Reset)
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fgCyanBytes = ColorBytes(FgCyan)
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fgGreenBytes = ColorBytes(FgGreen)
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)
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type ColoredValue struct {
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v any
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colors []ColorAttribute
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}
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var _ fmt.Formatter = (*ColoredValue)(nil)
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func (c *ColoredValue) Format(f fmt.State, verb rune) {
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_, _ = f.Write(ColorBytes(c.colors...))
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s := fmt.Sprintf(fmt.FormatString(f, verb), c.v)
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_, _ = f.Write([]byte(s))
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_, _ = f.Write(resetBytes)
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}
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func (c *ColoredValue) Value() any {
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return c.v
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}
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func NewColoredValue(v any, color ...ColorAttribute) *ColoredValue {
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return &ColoredValue{v: v, colors: color}
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}
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// ColorBytes converts a list of ColorAttributes to a byte array
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func ColorBytes(attrs ...ColorAttribute) []byte {
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bytes := make([]byte, 0, 20)
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bytes = append(bytes, escape[0], '[')
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if len(attrs) > 0 {
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bytes = append(bytes, strconv.Itoa(int(attrs[0]))...)
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for _, a := range attrs[1:] {
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bytes = append(bytes, ';')
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bytes = append(bytes, strconv.Itoa(int(a))...)
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}
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} else {
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bytes = append(bytes, strconv.Itoa(int(Bold))...)
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}
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bytes = append(bytes, 'm')
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return bytes
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}
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