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[feature] Add color mode #40

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[feature] Add color mode #40

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14 changes: 12 additions & 2 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@ func main() {
var dumpMode bool
flag.BoolVar(&dumpMode, "dump", false, "prints the grep command rather than executing it")

var colorMode bool
flag.BoolVar(&colorMode, "color", false, "display color-highlighting the matches in output")

flag.Parse()

if listMode {
Expand Down Expand Up @@ -98,15 +101,22 @@ func main() {

} else {
var cmd *exec.Cmd
colorVal := "--color="
operator := "grep"
if pat.Engine != "" {
operator = pat.Engine
}

if colorMode {
colorVal += "always"
} else {
colorVal += "never"
}

if stdinIsPipe() {
cmd = exec.Command(operator, pat.Flags, pat.Pattern)
cmd = exec.Command(operator, pat.Flags, pat.Pattern, colorVal)
} else {
cmd = exec.Command(operator, pat.Flags, pat.Pattern, files)
cmd = exec.Command(operator, pat.Flags, pat.Pattern, colorVal, files)
}
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
Expand Down