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[PATCH 08/19] loose: write loose objects map via their source

From
Patrick Steinhardt <ps@pks.im>
Date
Jul 9, 2025, 11:17 UTC
Message-ID
<20250709-pks-object-file-wo-the-repository-v1-8-62627b55707f@pks.im>
In-Reply-To
<20250709-pks-object-file-wo-the-repository-v1-0-62627b55707f@pks.im>

When a repository is configured to have a compatibility hash algorithm we keep track of object ID mappings for loose objects via the loose object map. This map simply maps an object ID of the actual hash to the object ID of the compatibility hash. This loose object map is an inherent property of the loose files backend and thus of one specific object source.

Refactor the interfaces to reflect this by requiring a `struct odb_source` as input instead of a repository. This prepares for subsequent commits where we will refactor writing of loose objects to work on a `struct odb_source`, as well.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 loose.c       | 16 +++++++++-------
 loose.h       |  4 +++-
 object-file.c |  6 +++---
 3 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/loose.c b/loose.c
index 519f5db7935..e8ea6e7e24b 100644
--- a/loose.c
+++ b/loose.c
@@ -166,7 +166,8 @@ int repo_write_loose_object_map(struct repository *repo)
 	return -1;
 }
 
-static int write_one_object(struct repository *repo, const struct object_id *oid,
+static int write_one_object(struct odb_source *source,
+			    const struct object_id *oid,
 			    const struct object_id *compat_oid)
 {
 	struct lock_file lock;
@@ -174,7 +175,7 @@ static int write_one_object(struct repository *repo, const struct object_id *oid
 	struct stat st;
 	struct strbuf buf = STRBUF_INIT, path = STRBUF_INIT;
 
-	repo_common_path_replace(repo, &path, "objects/loose-object-idx");
+	strbuf_addf(&path, "%s/loose-object-idx", source->path);
 	hold_lock_file_for_update_timeout(&lock, path.buf, LOCK_DIE_ON_ERROR, -1);
 
 	fd = open(path.buf, O_WRONLY | O_CREAT | O_APPEND, 0666);
@@ -190,7 +191,7 @@ static int write_one_object(struct repository *repo, const struct object_id *oid
 		goto errout;
 	if (close(fd))
 		goto errout;
-	adjust_shared_perm(repo, path.buf);
+	adjust_shared_perm(source->odb->repo, path.buf);
 	rollback_lock_file(&lock);
 	strbuf_release(&buf);
 	strbuf_release(&path);
@@ -204,17 +205,18 @@ static int write_one_object(struct repository *repo, const struct object_id *oid
 	return -1;
 }
 
-int repo_add_loose_object_map(struct repository *repo, const struct object_id *oid,
+int repo_add_loose_object_map(struct odb_source *source,
+			      const struct object_id *oid,
 			      const struct object_id *compat_oid)
 {
 	int inserted = 0;
 
-	if (!should_use_loose_object_map(repo))
+	if (!should_use_loose_object_map(source->odb->repo))
 		return 0;
 
-	inserted = insert_loose_map(repo->objects->sources, oid, compat_oid);
+	inserted = insert_loose_map(source, oid, compat_oid);
 	if (inserted)
-		return write_one_object(repo, oid, compat_oid);
+		return write_one_object(source, oid, compat_oid);
 	return 0;
 }
 
diff --git a/loose.h b/loose.h
index 28512306e5f..6af1702973c 100644
--- a/loose.h
+++ b/loose.h
@@ -4,6 +4,7 @@
 #include "khash.h"
 
 struct repository;
+struct odb_source;
 
 struct loose_object_map {
 	kh_oid_map_t *to_compat;
@@ -16,7 +17,8 @@ int repo_loose_object_map_oid(struct repository *repo,
 			      const struct object_id *src,
 			      const struct git_hash_algo *dest_algo,
 			      struct object_id *dest);
-int repo_add_loose_object_map(struct repository *repo, const struct object_id *oid,
+int repo_add_loose_object_map(struct odb_source *source,
+			      const struct object_id *oid,
 			      const struct object_id *compat_oid);
 int repo_read_loose_object_map(struct repository *repo);
 int repo_write_loose_object_map(struct repository *repo);
diff --git a/object-file.c b/object-file.c
index 6a7049a9e98..a9248760a26 100644
--- a/object-file.c
+++ b/object-file.c
@@ -1025,7 +1025,7 @@ int stream_loose_object(struct input_stream *in_stream, size_t len,
 	err = finalize_object_file_flags(the_repository, tmp_file.buf, filename.buf,
 					 FOF_SKIP_COLLISION_CHECK);
 	if (!err && compat)
-		err = repo_add_loose_object_map(the_repository, oid, &compat_oid);
+		err = repo_add_loose_object_map(the_repository->objects->sources, oid, &compat_oid);
 cleanup:
 	strbuf_release(&tmp_file);
 	strbuf_release(&filename);
@@ -1069,7 +1069,7 @@ int write_object_file_flags(const void *buf, unsigned long len,
 	if (write_loose_object(oid, hdr, hdrlen, buf, len, 0, flags))
 		return -1;
 	if (compat)
-		return repo_add_loose_object_map(repo, oid, &compat_oid);
+		return repo_add_loose_object_map(repo->objects->sources, oid, &compat_oid);
 	return 0;
 }
 
@@ -1103,7 +1103,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
 	hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
 	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime, 0);
 	if (!ret && compat)
-		ret = repo_add_loose_object_map(the_repository, oid, &compat_oid);
+		ret = repo_add_loose_object_map(the_repository->objects->sources, oid, &compat_oid);
 	free(buf);
 
 	return ret;
-- 
2.50.1.327.g047016eb4a.dirty
Previous: Patrick SteinhardtNext: Karthik Nayak
Message 11 of 60 in “object-file: get rid of `the_repository`”
  1. 00/19 object-file: get rid of `the_repository`Patrick Steinhardt, Jul 9, 2025
  2. 01/19 object-file: fix -Wsign-compare warningsPatrick Steinhardt, Jul 9, 2025
  3. 02/19 object-file: stop using `the_hash_algo`Patrick Steinhardt, Jul 9, 2025
  4. Karthik NayakJul 11, 2025
  5. 03/19 object-file: get rid of `the_repository` in `has_loose_object()`Patrick Steinhardt, Jul 9, 2025
  6. 04/19 object-file: inline `check_and_freshen()` functionsPatrick Steinhardt, Jul 9, 2025
  7. 05/19 object-file: get rid of `the_repository` when freshening objectsPatrick Steinhardt, Jul 9, 2025
  8. Karthik NayakJul 11, 2025
  9. 06/19 object-file: get rid of `the_repository` in `loose_object_info()`Patrick Steinhardt, Jul 9, 2025
  10. 07/19 object-file: get rid of `the_repository` in `finalize_object_file()`Patrick Steinhardt, Jul 9, 2025
  11. 08/19 loose: write loose objects map via their sourcePatrick Steinhardt, Jul 9, 2025
  12. Karthik NayakJul 11, 2025
  13. Patrick SteinhardtJul 15, 2025
  14. 09/19 odb: introduce `odb_write_object()`Patrick Steinhardt, Jul 9, 2025
  15. Toon ClaesJul 10, 2025
  16. Patrick SteinhardtJul 15, 2025
  17. 10/19 object-file: get rid of `the_repository` when writing objectsPatrick Steinhardt, Jul 9, 2025
  18. 11/19 object-file: inline `for_each_loose_file_in_objdir_buf()`Patrick Steinhardt, Jul 9, 2025
  19. 12/19 object-file: remove declaration for `for_each_file_in_obj_subdir()`Patrick Steinhardt, Jul 9, 2025
  20. 13/19 object-file: get rid of `the_repository` in loose object iteratorsPatrick Steinhardt, Jul 9, 2025
  21. Toon ClaesJul 10, 2025
  22. 14/19 object-file: get rid of `the_repository` in `read_loose_object()`Patrick Steinhardt, Jul 9, 2025
  23. 15/19 object-file: get rid of `the_repository` in `force_object_loose()`Patrick Steinhardt, Jul 9, 2025
  24. Toon ClaesJul 10, 2025
  25. Karthik NayakJul 11, 2025
  26. Patrick SteinhardtJul 15, 2025
  27. Toon ClaesJul 15, 2025
  28. 16/19 object-file: get rid of `the_repository` in index-related functionsPatrick Steinhardt, Jul 9, 2025
  29. 17/19 environment: move compression level into repo settingsPatrick Steinhardt, Jul 9, 2025
  30. Phillip WoodJul 9, 2025
  31. Junio C HamanoJul 11, 2025
  32. Patrick SteinhardtJul 15, 2025
  33. Patrick SteinhardtJul 15, 2025
  34. Phillip WoodJul 15, 2025
  35. Patrick SteinhardtJul 15, 2025
  36. Patrick SteinhardtJul 16, 2025
  37. Phillip WoodJul 17, 2025
  38. Junio C HamanoJul 17, 2025
  39. Junio C HamanoJul 15, 2025
  40. Ayush ChandekarJul 17, 2025
  41. 18/19 environment: move object creation mode into repo settingsPatrick Steinhardt, Jul 9, 2025
  42. 19/19 object-file: drop USE_THE_REPOSITORY_VARIABLEPatrick Steinhardt, Jul 9, 2025
  43. 00/16 object-file: get rid of `the_repository`Patrick Steinhardt, Jul 17, 2025
  44. 01/16 object-file: fix -Wsign-compare warningsPatrick Steinhardt, Jul 17, 2025
  45. Jeff KingApr 5, 2026
  46. 02/16 object-file: stop using `the_hash_algo`Patrick Steinhardt, Jul 17, 2025
  47. 03/16 object-file: get rid of `the_repository` in `has_loose_object()`Patrick Steinhardt, Jul 17, 2025
  48. 04/16 object-file: inline `check_and_freshen()` functionsPatrick Steinhardt, Jul 17, 2025
  49. 05/16 object-file: get rid of `the_repository` when freshening objectsPatrick Steinhardt, Jul 17, 2025
  50. 06/16 object-file: get rid of `the_repository` in `loose_object_info()`Patrick Steinhardt, Jul 17, 2025
  51. 07/16 object-file: get rid of `the_repository` in `finalize_object_file()`Patrick Steinhardt, Jul 17, 2025
  52. 08/16 loose: write loose objects map via their sourcePatrick Steinhardt, Jul 17, 2025
  53. 09/16 odb: introduce `odb_write_object()`Patrick Steinhardt, Jul 17, 2025
  54. 10/16 object-file: get rid of `the_repository` when writing objectsPatrick Steinhardt, Jul 17, 2025
  55. 11/16 object-file: inline `for_each_loose_file_in_objdir_buf()`Patrick Steinhardt, Jul 17, 2025
  56. 12/16 object-file: remove declaration for `for_each_file_in_obj_subdir()`Patrick Steinhardt, Jul 17, 2025
  57. 13/16 object-file: get rid of `the_repository` in loose object iteratorsPatrick Steinhardt, Jul 17, 2025
  58. 14/16 object-file: get rid of `the_repository` in `read_loose_object()`Patrick Steinhardt, Jul 17, 2025
  59. 15/16 object-file: get rid of `the_repository` in `force_object_loose()`Patrick Steinhardt, Jul 17, 2025
  60. 16/16 object-file: get rid of `the_repository` in index-related functionsPatrick Steinhardt, Jul 17, 2025

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