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package diff
import "github.com/go-git/go-git/v5/plumbing/color"
// A ColorKey is a key into a ColorConfig map and also equal to the key in the
// diff.color subsection of the config. See
// https://github.com/git/git/blob/v2.26.2/diff.c#L83-L106.
type ColorKey string
// ColorKeys.
const (
Context ColorKey = "context"
Meta ColorKey = "meta"
Frag ColorKey = "frag"
Old ColorKey = "old"
New ColorKey = "new"
Commit ColorKey = "commit"
Whitespace ColorKey = "whitespace"
Func ColorKey = "func"
OldMoved ColorKey = "oldMoved"
OldMovedAlternative ColorKey = "oldMovedAlternative"
OldMovedDimmed ColorKey = "oldMovedDimmed"
OldMovedAlternativeDimmed ColorKey = "oldMovedAlternativeDimmed"
NewMoved ColorKey = "newMoved"
NewMovedAlternative ColorKey = "newMovedAlternative"
NewMovedDimmed ColorKey = "newMovedDimmed"
NewMovedAlternativeDimmed ColorKey = "newMovedAlternativeDimmed"
ContextDimmed ColorKey = "contextDimmed"
OldDimmed ColorKey = "oldDimmed"
NewDimmed ColorKey = "newDimmed"
ContextBold ColorKey = "contextBold"
OldBold ColorKey = "oldBold"
NewBold ColorKey = "newBold"
)
// A ColorConfig is a color configuration. A nil or empty ColorConfig
// corresponds to no color.
type ColorConfig map[ColorKey]string
// A ColorConfigOption sets an option on a ColorConfig.
type ColorConfigOption func(ColorConfig)
// WithColor sets the color for key.
func WithColor(key ColorKey, color string) ColorConfigOption {
return func(cc ColorConfig) {
cc[key] = color
}
}
// defaultColorConfig is the default color configuration. See
// https://github.com/git/git/blob/v2.26.2/diff.c#L57-L81.
var defaultColorConfig = ColorConfig{
Context: color.Normal,
Meta: color.Bold,
Frag: color.Cyan,
Old: color.Red,
New: color.Green,
Commit: color.Yellow,
Whitespace: color.BgRed,
Func: color.Normal,
OldMoved: color.BoldMagenta,
OldMovedAlternative: color.BoldBlue,
OldMovedDimmed: color.Faint,
OldMovedAlternativeDimmed: color.FaintItalic,
NewMoved: color.BoldCyan,
NewMovedAlternative: color.BoldYellow,
NewMovedDimmed: color.Faint,
NewMovedAlternativeDimmed: color.FaintItalic,
ContextDimmed: color.Faint,
OldDimmed: color.FaintRed,
NewDimmed: color.FaintGreen,
ContextBold: color.Bold,
OldBold: color.BoldRed,
NewBold: color.BoldGreen,
}
// NewColorConfig returns a new ColorConfig.
func NewColorConfig(options ...ColorConfigOption) ColorConfig {
cc := make(ColorConfig)
for key, value := range defaultColorConfig {
cc[key] = value
}
for _, option := range options {
option(cc)
}
return cc
}
// Reset returns the ANSI escape sequence to reset the color with key set from
// cc. If no color was set then no reset is needed so it returns the empty
// string.
func (cc ColorConfig) Reset(key ColorKey) string {
if cc[key] == "" {
return ""
}
return color.Reset
}
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