grep: prefer builtin over external one when coloring results

As far as I know, not all grep programs support coloring, so we should
rely on builtin grep. If you want external grep, set
color.grep.external to empty string.

Signed-off-by: Nguyễn Thái Ngọc Duy <redacted>
Signed-off-by: Junio C Hamano <redacted>

diff --git a/builtin-grep.c b/builtin-grep.c
index 9e7e766a496e44d3f5f266f24eb3430ae046235a..89489ddcf8edb85160036b0336ab4ce80c3cb6bc 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -825,6 +825,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
                }
        }
 
+       if (opt.color && !opt.color_external)
+               builtin_grep = 1;
        if (!opt.pattern_list)
                die("no pattern given.");
        if ((opt.regflags != REG_NEWLINE) && opt.fixed)