delta-islands: stop depending on the_repository

There are multiple sites in "delta-islands.c" where we use the
global `the_repository` variable, either explicitly or implicitly by
using `the_hash_algo`.

Refactor the code to stop using `the_repository`. In most cases this is
trivial because we already had a repository available in the calling
context, with the only exception being `propagate_island_marks()`. Adapt
it so that the repository gets passed in via a parameter.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

builtin/pack-objects.c

@@ -3847,7 +3847,7 @@ static void show_commit(struct commit *commit, void *data UNUSED)
 		index_commit_for_bitmap(commit);
 
 	if (use_delta_islands)
-		propagate_island_marks(commit);
+		propagate_island_marks(the_repository, commit);
 }
 
 static void show_object(struct object *obj, const char *name,

delta-islands.c

@@ -1,4 +1,3 @@
-#define USE_THE_REPOSITORY_VARIABLE
 #define DISABLE_SIGN_COMPARE_WARNINGS
 
 #include "git-compat-util.h"
@@ -267,8 +266,7 @@ void resolve_tree_islands(struct repository *r,
 	QSORT(todo, nr, tree_depth_compare);
 
 	if (progress)
-		progress_state = start_progress(the_repository,
-						_("Propagating island marks"), nr);
+		progress_state = start_progress(r, _("Propagating island marks"), nr);
 
 	for (i = 0; i < nr; i++) {
 		struct object_entry *ent = todo[i].entry;
@@ -490,9 +488,9 @@ void load_delta_islands(struct repository *r, int progress)
 
 	island_marks = kh_init_oid_map();
 
-	git_config(island_config_callback, &ild);
+	repo_config(r, island_config_callback, &ild);
 	ild.remote_islands = kh_init_str();
-	refs_for_each_ref(get_main_ref_store(the_repository),
+	refs_for_each_ref(get_main_ref_store(r),
 			  find_island_for_ref, &ild);
 	free_config_regexes(&ild);
 	deduplicate_islands(ild.remote_islands, r);
@@ -502,16 +500,16 @@ void load_delta_islands(struct repository *r, int progress)
 		fprintf(stderr, _("Marked %d islands, done.\n"), island_counter);
 }
 
-void propagate_island_marks(struct commit *commit)
+void propagate_island_marks(struct repository *r, struct commit *commit)
 {
 	khiter_t pos = kh_get_oid_map(island_marks, commit->object.oid);
 
 	if (pos < kh_end(island_marks)) {
 		struct commit_list *p;
 		struct island_bitmap *root_marks = kh_value(island_marks, pos);
 
-		repo_parse_commit(the_repository, commit);
-		set_island_marks(&repo_get_commit_tree(the_repository, commit)->object,
+		repo_parse_commit(r, commit);
+		set_island_marks(&repo_get_commit_tree(r, commit)->object,
 				 root_marks);
 		for (p = commit->parents; p; p = p->next)
 			set_island_marks(&p->item->object, root_marks);

delta-islands.h

@@ -12,7 +12,7 @@ void resolve_tree_islands(struct repository *r,
 			  int progress,
 			  struct packing_data *to_pack);
 void load_delta_islands(struct repository *r, int progress);
-void propagate_island_marks(struct commit *commit);
+void propagate_island_marks(struct repository *r, struct commit *commit);
 int compute_pack_layers(struct packing_data *to_pack);
 void free_island_marks(void);