Junio C Hamano <gits...@pobox.com> writes:

> Jens Lehmann <jens.lehm...@web.de> writes:
>
>> diff --git a/wt-status.h b/wt-status.h
>> index 6c29e6f..cd2709f 100644
>> --- a/wt-status.h
>> +++ b/wt-status.h
>> @@ -91,6 +91,8 @@ struct wt_status_state {
>>      unsigned char cherry_pick_head_sha1[20];
>>  };
>>
>> +const char wt_status_diff_divider[];
>
> This gives me:
>
> ./wt-status.h:94:12: error: array 'wt_status_diff_divider' assumed to have 
> one element [-Werror]
> cc1: all warnings being treated as errors
>
> which is a bit unfortunate.
>
> Regardless of that, from the API design standpoint, I think it may
> be much better not to expose this particular implementation element
> (i.e. the array) to the caller, but instead to export a helper
> function that takes a pointer to a piece of memory and let callers
> ask an "I have this line---is it the status cut mark?" question.

That is, something like this, perhaps.

 builtin/commit.c          |  9 +++------
 t/t7507-commit-verbose.sh | 15 ++++++++++++++-
 wt-status.c               | 15 +++++++++++++++
 wt-status.h               |  1 +
 4 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/builtin/commit.c b/builtin/commit.c
index 6ab4605..fedb45a 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1505,7 +1505,7 @@ int cmd_commit(int argc, const char **argv, const char 
*prefix)
        struct strbuf sb = STRBUF_INIT;
        struct strbuf author_ident = STRBUF_INIT;
        const char *index_file, *reflog_msg;
-       char *nl, *p;
+       char *nl;
        unsigned char sha1[20];
        struct ref_lock *ref_lock;
        struct commit_list *parents = NULL, **pptr = &parents;
@@ -1601,11 +1601,8 @@ int cmd_commit(int argc, const char **argv, const char 
*prefix)
        }
 
        /* Truncate the message just before the diff, if any. */
-       if (verbose) {
-               p = strstr(sb.buf, "\ndiff --git ");
-               if (p != NULL)
-                       strbuf_setlen(&sb, p - sb.buf + 1);
-       }
+       if (verbose)
+               wt_status_truncate_message_at_cut_line(&sb);
 
        if (cleanup_mode != CLEANUP_NONE)
                stripspace(&sb, cleanup_mode == CLEANUP_ALL);
diff --git a/t/t7507-commit-verbose.sh b/t/t7507-commit-verbose.sh
index da5bd3b..09c1150 100755
--- a/t/t7507-commit-verbose.sh
+++ b/t/t7507-commit-verbose.sh
@@ -65,9 +65,22 @@ test_expect_success 'diff in message is retained without -v' 
'
        check_message diff
 '
 
-test_expect_failure 'diff in message is retained with -v' '
+test_expect_success 'diff in message is retained with -v' '
        git commit --amend -F diff -v &&
        check_message diff
 '
 
+test_expect_success 'submodule log is stripped out too with -v' '
+       git config diff.submodule log &&
+       git submodule add ./. sub &&
+       git commit -m "sub added" &&
+       (
+               cd sub &&
+               echo "more" >>file &&
+               git commit -a -m "submodule commit"
+       ) &&
+       GIT_EDITOR=cat test_must_fail git commit -a -v 2>err &&
+       test_i18ngrep "Aborting commit due to empty commit message." err
+'
+
 test_done
diff --git a/wt-status.c b/wt-status.c
index b4e44ba..492506a 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -16,6 +16,9 @@
 #include "column.h"
 #include "strbuf.h"
 
+static const char wt_status_cut_line[] =
+"# ------------------------ >8 ------------------------\n";
+
 static char default_wt_status_colors[][COLOR_MAXLEN] = {
        GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
        GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
@@ -767,6 +770,15 @@ conclude:
        status_printf_ln(s, GIT_COLOR_NORMAL, "");
 }
 
+void wt_status_truncate_message_at_cut_line(struct strbuf *buf)
+{
+       const char *p;
+
+       p = strstr(buf->buf, wt_status_cut_line);
+       if (p && (p == buf->buf || p[-1] == '\n'))
+               strbuf_setlen(buf, p - buf->buf);
+}
+
 static void wt_status_print_verbose(struct wt_status *s)
 {
        struct rev_info rev;
@@ -791,6 +803,9 @@ static void wt_status_print_verbose(struct wt_status *s)
         */
        if (s->fp != stdout)
                rev.diffopt.use_color = 0;
+       fprintf(s->fp, wt_status_cut_line);
+       fprintf(s->fp, _("# Do not touch the line above.\n"));
+       fprintf(s->fp, _("# Everything below will be removed.\n"));
        run_diff_index(&rev, 1);
 }
 
diff --git a/wt-status.h b/wt-status.h
index 6c29e6f..30a4812 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -91,6 +91,7 @@ struct wt_status_state {
        unsigned char cherry_pick_head_sha1[20];
 };
 
+void wt_status_truncate_message_at_cut_line(struct strbuf *);
 void wt_status_prepare(struct wt_status *s);
 void wt_status_print(struct wt_status *s);
 void wt_status_collect(struct wt_status *s);
--
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