progress: stop using the_repository

Stop using `the_repository` in the "progress" subsystem by passing in a
repository when initializing `struct progress`. Furthermore, store a
pointer to the repository in that struct so that we can pass it to the
trace2 API when logging information.

Adjust callers accordingly by using `the_repository`. While there may be
some callers that have a repository available in their context, this
trivial conversion allows for easier verification and bubbles up the use
of `the_repository` by one level.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/index-pack.c

@@ -282,7 +282,8 @@ static unsigned check_objects(void)
 	max = get_max_object_index();
 
 	if (verbose)
-		progress = start_delayed_progress(_("Checking objects"), max);
+		progress = start_delayed_progress(the_repository,
+						  _("Checking objects"), max);
 
 	for (i = 0; i < max; i++) {
 		foreign_nr += check_object(get_indexed_object(i));
@@ -1249,6 +1250,7 @@ static void parse_pack_objects(unsigned char *hash)
 
 	if (verbose)
 		progress = start_progress(
+				the_repository,
 				progress_title ? progress_title :
 				from_stdin ? _("Receiving objects") : _("Indexing objects"),
 				nr_objects);
@@ -1329,7 +1331,8 @@ static void resolve_deltas(struct pack_idx_option *opts)
 	QSORT(ref_deltas, nr_ref_deltas, compare_ref_delta_entry);
 
 	if (verbose || show_resolving_progress)
-		progress = start_progress(_("Resolving deltas"),
+		progress = start_progress(the_repository,
+					  _("Resolving deltas"),
 					  nr_ref_deltas + nr_ofs_deltas);
 
 	nr_dispatched = 0;