Jeff King <[email protected]> writes:

> This patch flips the rules to:
>
>   1. if the user asked for ref@{0}, always show the index
>
>   2. if the user asked for ref@{now}, always show the date
>
>   3. otherwise, we have just "ref"; show them counted by
>      default, but respect the presence of "--date" as a clue
>      that the user wanted them date-based

The revision.c parser for "git log --date=default -g master" would flip
the "explicit" bit, revs->date_mode is set to DATE_NORMAL, and that value
will eventually come as dmode here.

> diff --git a/reflog-walk.c b/reflog-walk.c
> index 3549318..b974258 100644
> --- a/reflog-walk.c
> +++ b/reflog-walk.c
> @@ -276,7 +276,8 @@ void get_reflog_selector(struct strbuf *sb,
>       }
>  
>       strbuf_addf(sb, "%s@{", printed_ref);
> -     if (commit_reflog->selector == SELECTOR_DATE || dmode) {
> +     if (commit_reflog->selector == SELECTOR_DATE ||
> +         (commit_reflog->selector == SELECTOR_NONE && dmode)) {
>               info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
>               strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));

But DATE_NORMAL happens to be zero ;-) "git log --date=default -g master"
would still show the counted version.

I personally do not care about that behaviour, but I know that I will
later later have to deal with people who do care, which is annoying.

Probably we would internally need to define two values to ask for the
DATE_NORMAL output.  Move DATE_NORMAL to non-zero value, introduce a new
DATE_DEFAULT that is zero, and make their output identical, perhaps
something like the attached (not even compile tested).

The implicit comparison to zero in the above is a bad code (but that is
a problem from the very old days).

diff --git a/cache.h b/cache.h
index 58ff054..fe42e80 100644
--- a/cache.h
+++ b/cache.h
@@ -876,7 +876,8 @@ extern struct object *peel_to_type(const char *name, int 
namelen,
                                   struct object *o, enum object_type);
 
 enum date_mode {
-       DATE_NORMAL = 0,
+       DATE_DEFAULT = 0,
+       DATE_NORMAL,
        DATE_RELATIVE,
        DATE_SHORT,
        DATE_LOCAL,
diff --git a/reflog-walk.c b/reflog-walk.c
index b974258..d002516 100644
--- a/reflog-walk.c
+++ b/reflog-walk.c
@@ -277,7 +277,7 @@ void get_reflog_selector(struct strbuf *sb,
 
        strbuf_addf(sb, "%s@{", printed_ref);
        if (commit_reflog->selector == SELECTOR_DATE ||
-           (commit_reflog->selector == SELECTOR_NONE && dmode)) {
+           (commit_reflog->selector == SELECTOR_NONE && (dmode != 
DATE_DEFAULT))) {
                info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
                strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
        } else {

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