revision.c: leave a note for "a lone :" enhancement

If we later add a command in the log family that by default limit
its operation to the current subdirectory, we would need to resurrect
the "a lone ':' on the command line means no pathspec whatsoever".

Now the codepath was cleaned up, we can do so in one place.  Leave a
note to mark where it is for later generations.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/revision.c b/revision.c
index e571a3fd10514b8361925469eea93de43b51744f..17f9fcb9664c76c97efa6daed7a63e6c2e3b6036 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -1589,6 +1589,20 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
        }
 
        if (prune_data.nr) {
+               /*
+                * If we need to introduce the magic "a lone ':' means no
+                * pathspec whatsoever", here is the place to do so.
+                *
+                * if (prune_data.nr == 1 && !strcmp(prune_data[0], ":")) {
+                *      prune_data.nr = 0;
+                *      prune_data.alloc = 0;
+                *      free(prune_data.path);
+                *      prune_data.path = NULL;
+                * } else {
+                *      terminate prune_data.alloc with NULL and
+                *      call init_pathspec() to set revs->prune_data here.
+                * }
+                */
                ALLOC_GROW(prune_data.path, prune_data.nr+1, prune_data.alloc);
                prune_data.path[prune_data.nr++] = NULL;
                init_pathspec(&revs->prune_data,