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-rw-r--r--builtin/grep.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/builtin/grep.c b/builtin/grep.c
index 09ca4c9..82530a6 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -209,6 +209,7 @@ static void start_threads(struct grep_opt *opt)
int err;
struct grep_opt *o = grep_opt_dup(opt);
o->output = strbuf_out;
+ o->debug = 0;
compile_grep_patterns(o);
err = pthread_create(&threads[i], NULL, run, o);
@@ -817,6 +818,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
N_("indicate hit with exit status without output")),
OPT_BOOLEAN(0, "all-match", &opt.all_match,
N_("show only matches from files that match all patterns")),
+ { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
+ N_("show parse tree for grep expression"),
+ PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
OPT_GROUP(""),
{ OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
N_("pager"), N_("show matching files in the pager"),