grep: fix coloring of hunk marks between files

Commit 431d6e7b (grep: enable threading for context line printing)
split the printing of the "--\n" mark between results from different
files out into two places: show_line() in grep.c for the non-threaded
case and work_done() in builtin/grep.c for the threaded case.  Commit
55f638bd (grep: Colorize filename, line number, and separator) updated
the former, but not the latter, so the separators between files are
not colored if threads are used.

This patch merges the two.  In the threaded case, hunk marks are now
printed by show_line() for every file, including the first one, and the
very first mark is simply skipped in work_done().  This ensures that the
output is properly colored and works just as well.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/grep.c b/builtin/grep.c
index 871afaa3c76ea34b67671a6e4a46957a08a946e5..0d5a90b94b5153c17f8834455b8dbb7e252c5284 100644 (file)
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -93,8 +93,7 @@ static pthread_cond_t cond_write;
 /* Signalled when we are finished with everything. */
 static pthread_cond_t cond_result;
 
-static int print_hunk_marks_between_files;
-static int printed_something;
+static int skip_first_line;
 
 static void add_work(enum work_type type, char *name, void *id)
 {
@@ -160,10 +159,20 @@ static void work_done(struct work_item *w)
            todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
                w = &todo[todo_done];
                if (w->out.len) {
-                       if (print_hunk_marks_between_files && printed_something)
-                               write_or_die(1, "--\n", 3);
-                       write_or_die(1, w->out.buf, w->out.len);
-                       printed_something = 1;
+                       const char *p = w->out.buf;
+                       size_t len = w->out.len;
+
+                       /* Skip the leading hunk mark of the first file. */
+                       if (skip_first_line) {
+                               while (len) {
+                                       len--;
+                                       if (*p++ == '\n')
+                                               break;
+                               }
+                               skip_first_line = 0;
+                       }
+
+                       write_or_die(1, p, len);
                }
                free(w->name);
                free(w->identifier);
@@ -968,7 +977,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 
        if (use_threads) {
                if (opt.pre_context || opt.post_context)
-                       print_hunk_marks_between_files = 1;
+                       skip_first_line = 1;
                start_threads(&opt);
        }
 #else

diff --git a/grep.c b/grep.c
index d03d9e24c23eff2d60ae7226a412f3ccf66670fd..3f15085d0e8bc82a0e098b9f3750d69bacc62590 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -941,9 +941,18 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
        if (!opt->output)
                opt->output = std_output;
 
-       if (opt->last_shown && (opt->pre_context || opt->post_context) &&
-           opt->output == std_output)
-               opt->show_hunk_mark = 1;
+       if (opt->pre_context || opt->post_context) {
+               /* Show hunk marks, except for the first file. */
+               if (opt->last_shown)
+                       opt->show_hunk_mark = 1;
+               /*
+                * If we're using threads then we can't easily identify
+                * the first file.  Always put hunk marks in that case
+                * and skip the very first one later in work_done().
+                */
+               if (opt->output != std_output)
+                       opt->show_hunk_mark = 1;
+       }
        opt->last_shown = 0;
 
        switch (opt->binary) {

diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index 69bd576d1c1a0bfcd086b68d8dc07c03c22b7a5a..539a8fe6e9391f27d24cd8b85140209b60f10f39 100755 (executable)
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -716,4 +716,34 @@ test_expect_success LIBPCRE 'grep -G -F -E -P pattern' '
        test_cmp expected actual
 '
 
+test_config() {
+       git config "$1" "$2" &&
+       test_when_finished "git config --unset $1"
+}
+
+cat >expected <<EOF
+hello.c<RED>:<RESET>int main(int argc, const char **argv)
+hello.c<RED>-<RESET>{
+<RED>--<RESET>
+hello.c<RED>:<RESET>   /* char ?? */
+hello.c<RED>-<RESET>}
+<RED>--<RESET>
+hello_world<RED>:<RESET>Hello_world
+hello_world<RED>-<RESET>HeLLo_world
+EOF
+
+test_expect_success 'grep --color, separator' '
+       test_config color.grep.context          normal &&
+       test_config color.grep.filename         normal &&
+       test_config color.grep.function         normal &&
+       test_config color.grep.linenumber       normal &&
+       test_config color.grep.match            normal &&
+       test_config color.grep.selected         normal &&
+       test_config color.grep.separator        red &&
+
+       git grep --color=always -A1 -e char -e lo_w hello.c hello_world |
+       test_decode_color >actual &&
+       test_cmp expected actual
+'
+
 test_done