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[PATCH v3 08/10] commit-graph: stop using `the_hash_algo`

From
Patrick Steinhardt <ps@pks.im>
Date
Aug 7, 2025, 08:04 UTC
Message-ID
<20250807-b4-pks-commit-graph-wo-the-repository-v3-8-82edef830a1e@pks.im>
In-Reply-To
<20250807-b4-pks-commit-graph-wo-the-repository-v3-0-82edef830a1e@pks.im>

Stop using `the_hash_algo` as it implicitly relies on `the_repository`. Instead, we either use the hash algo provided via the context or, if there is no such hash algo, we use `the_repository` explicitly. Such uses will be removed in subsequent commits.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 builtin/commit-graph.c |  3 ++-
 commit-graph.c         | 27 ++++++++++++++-------------
 commit-graph.h         |  3 ++-
 3 files changed, 18 insertions(+), 15 deletions(-)
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 145802afb7..680b03a83a 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -108,7 +108,8 @@ static int graph_verify(int argc, const char **argv, const char *prefix,
 		opened = OPENED_GRAPH;
 	else if (errno != ENOENT)
 		die_errno(_("Could not open commit-graph '%s'"), graph_name);
-	else if (open_commit_graph_chain(chain_name, &fd, &st))
+	else if (open_commit_graph_chain(chain_name, &fd, &st,
+					 the_repository->hash_algo))
 		opened = OPENED_CHAIN;
 	else if (errno != ENOENT)
 		die_errno(_("could not open commit-graph chain '%s'"), chain_name);
diff --git a/commit-graph.c b/commit-graph.c
index 77b785a5e0..594eca4110 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -263,7 +263,7 @@ struct commit_graph *load_commit_graph_one_fd_st(struct repository *r,
 
 	graph_size = xsize_t(st->st_size);
 
-	if (graph_size < graph_min_size(the_hash_algo)) {
+	if (graph_size < graph_min_size(r->hash_algo)) {
 		close(fd);
 		error(_("commit-graph file is too small"));
 		return NULL;
@@ -318,7 +318,7 @@ static int graph_read_commit_data(const unsigned char *chunk_start,
 				  size_t chunk_size, void *data)
 {
 	struct commit_graph *g = data;
-	if (chunk_size / graph_data_width(the_hash_algo) != g->num_commits)
+	if (chunk_size / graph_data_width(g->hash_algo) != g->num_commits)
 		return error(_("commit-graph commit data chunk is wrong size"));
 	g->chunk_commit_data = chunk_start;
 	return 0;
@@ -619,7 +619,8 @@ static int add_graph_to_chain(struct commit_graph *g,
 }
 
 int open_commit_graph_chain(const char *chain_file,
-			    int *fd, struct stat *st)
+			    int *fd, struct stat *st,
+			    const struct git_hash_algo *hash_algo)
 {
 	*fd = git_open(chain_file);
 	if (*fd < 0)
@@ -628,7 +629,7 @@ int open_commit_graph_chain(const char *chain_file,
 		close(*fd);
 		return 0;
 	}
-	if (st->st_size < (ssize_t) the_hash_algo->hexsz) {
+	if (st->st_size < (ssize_t) hash_algo->hexsz) {
 		close(*fd);
 		if (!st->st_size) {
 			/* treat empty files the same as missing */
@@ -653,7 +654,7 @@ struct commit_graph *load_commit_graph_chain_fd_st(struct repository *r,
 	FILE *fp = xfdopen(fd, "r");
 	size_t count;
 
-	count = st->st_size / (the_hash_algo->hexsz + 1);
+	count = st->st_size / (r->hash_algo->hexsz + 1);
 	CALLOC_ARRAY(oids, count);
 
 	odb_prepare_alternates(r->objects);
@@ -715,7 +716,7 @@ static struct commit_graph *load_commit_graph_chain(struct repository *r,
 	int fd;
 	struct commit_graph *g = NULL;
 
-	if (open_commit_graph_chain(chain_file, &fd, &st)) {
+	if (open_commit_graph_chain(chain_file, &fd, &st, r->hash_algo)) {
 		int incomplete;
 		/* ownership of fd is taken over by load function */
 		g = load_commit_graph_chain_fd_st(r, fd, &st, &incomplete);
@@ -907,7 +908,7 @@ static void fill_commit_graph_info(struct commit *item, struct commit_graph *g,
 		die(_("invalid commit position. commit-graph is likely corrupt"));
 
 	lex_index = pos - g->num_commits_in_base;
-	commit_data = g->chunk_commit_data + st_mult(graph_data_width(the_hash_algo), lex_index);
+	commit_data = g->chunk_commit_data + st_mult(graph_data_width(g->hash_algo), lex_index);
 
 	graph_data = commit_graph_data_at(item);
 	graph_data->graph_pos = pos;
@@ -1111,7 +1112,7 @@ static struct tree *load_tree_for_commit(struct repository *r,
 		g = g->base_graph;
 
 	commit_data = g->chunk_commit_data +
-			st_mult(graph_data_width(the_hash_algo),
+			st_mult(graph_data_width(g->hash_algo),
 				graph_pos - g->num_commits_in_base);
 
 	oidread(&oid, commit_data, the_repository->hash_algo);
@@ -1221,7 +1222,7 @@ static int write_graph_chunk_oids(struct hashfile *f,
 
 	for (count = 0; count < ctx->commits.nr; count++, list++) {
 		display_progress(ctx->progress, ++ctx->progress_cnt);
-		hashwrite(f, (*list)->object.oid.hash, the_hash_algo->rawsz);
+		hashwrite(f, (*list)->object.oid.hash, f->algop->rawsz);
 	}
 
 	return 0;
@@ -1252,7 +1253,7 @@ static int write_graph_chunk_data(struct hashfile *f,
 			die(_("unable to parse commit %s"),
 				oid_to_hex(&(*list)->object.oid));
 		tree = get_commit_tree_oid(*list);
-		hashwrite(f, tree->hash, the_hash_algo->rawsz);
+		hashwrite(f, tree->hash, ctx->r->hash_algo->rawsz);
 
 		parent = (*list)->parents;
 
@@ -2034,7 +2035,7 @@ static size_t write_graph_chunk_base_1(struct hashfile *f,
 		return 0;
 
 	num = write_graph_chunk_base_1(f, g->base_graph);
-	hashwrite(f, g->oid.hash, the_hash_algo->rawsz);
+	hashwrite(f, g->oid.hash, g->hash_algo->rawsz);
 	return num + 1;
 }
 
@@ -2058,7 +2059,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 	struct hashfile *f;
 	struct tempfile *graph_layer; /* when ctx->split is non-zero */
 	struct lock_file lk = LOCK_INIT;
-	const unsigned hashsz = the_hash_algo->rawsz;
+	const unsigned hashsz = ctx->r->hash_algo->rawsz;
 	struct strbuf progress_title = STRBUF_INIT;
 	struct chunkfile *cf;
 	unsigned char file_hash[GIT_MAX_RAWSZ];
@@ -2146,7 +2147,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 	hashwrite_be32(f, GRAPH_SIGNATURE);
 
 	hashwrite_u8(f, GRAPH_VERSION);
-	hashwrite_u8(f, oid_version(the_hash_algo));
+	hashwrite_u8(f, oid_version(ctx->r->hash_algo));
 	hashwrite_u8(f, get_num_chunks(cf));
 	hashwrite_u8(f, ctx->num_commit_graphs_after - 1);
 
diff --git a/commit-graph.h b/commit-graph.h
index 4879643db0..5f417f7666 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -32,7 +32,8 @@ struct string_list;
 char *get_commit_graph_filename(struct odb_source *source);
 char *get_commit_graph_chain_filename(struct odb_source *source);
 int open_commit_graph(const char *graph_file, int *fd, struct stat *st);
-int open_commit_graph_chain(const char *chain_file, int *fd, struct stat *st);
+int open_commit_graph_chain(const char *chain_file, int *fd, struct stat *st,
+			    const struct git_hash_algo *hash_algo);
 
 /*
  * Given a commit struct, try to fill the commit struct info, including:
-- 
2.51.0.rc0.215.g125493bb4a.dirty
Previous: Patrick SteinhardtNext: Patrick Steinhardt
Message 59 of 69 in “commit-graph: remove reliance on global state”
  1. 0/9 commit-graph: remove reliance on global statePatrick Steinhardt, Aug 4, 2025
  2. 1/9 trace2: introduce function to trace unsigned integersPatrick Steinhardt, Aug 4, 2025
  3. Taylor BlauAug 4, 2025
  4. 2/9 commit-graph: stop using signed integers to count bloom filtersPatrick Steinhardt, Aug 4, 2025
  5. Oswald BuddenhagenAug 4, 2025
  6. Patrick SteinhardtAug 4, 2025
  7. Junio C HamanoAug 4, 2025
  8. Taylor BlauAug 4, 2025
  9. Patrick SteinhardtAug 6, 2025
  10. Oswald BuddenhagenAug 6, 2025
  11. Junio C HamanoAug 6, 2025
  12. Junio C HamanoAug 6, 2025
  13. Patrick SteinhardtAug 7, 2025
  14. Junio C HamanoAug 7, 2025
  15. Patrick SteinhardtAug 11, 2025
  16. Junio C HamanoAug 5, 2025
  17. Taylor BlauAug 4, 2025
  18. 3/9 commit-graph: fix type for some write optionsPatrick Steinhardt, Aug 4, 2025
  19. Taylor BlauAug 4, 2025
  20. 4/9 commit-graph: fix sign comparison warningsPatrick Steinhardt, Aug 4, 2025
  21. Taylor BlauAug 4, 2025
  22. Patrick SteinhardtAug 6, 2025
  23. 5/9 commit-graph: stop using `the_hash_algo` via macrosPatrick Steinhardt, Aug 4, 2025
  24. Taylor BlauAug 4, 2025
  25. 6/9 commit-graph: store the hash algorithm instead of its lengthPatrick Steinhardt, Aug 4, 2025
  26. Taylor BlauAug 4, 2025
  27. 7/9 commit-graph: stop using `the_hash_algo`Patrick Steinhardt, Aug 4, 2025
  28. Taylor BlauAug 4, 2025
  29. Patrick SteinhardtAug 6, 2025
  30. 8/9 commit-graph: stop using `the_repository`Patrick Steinhardt, Aug 4, 2025
  31. Taylor BlauAug 4, 2025
  32. 9/9 commit-graph: stop passing in redundant repositoryPatrick Steinhardt, Aug 4, 2025
  33. Derrick StoleeAug 5, 2025
  34. Patrick SteinhardtAug 6, 2025
  35. 00/10 commit-graph: remove reliance on global statePatrick Steinhardt, Aug 6, 2025
  36. 01/10 trace2: introduce function to trace unsigned integersPatrick Steinhardt, Aug 6, 2025
  37. 02/10 commit-graph: stop using signed integers to count Bloom filtersPatrick Steinhardt, Aug 6, 2025
  38. 03/10 commit-graph: fix type for some write optionsPatrick Steinhardt, Aug 6, 2025
  39. Oswald BuddenhagenAug 6, 2025
  40. Junio C HamanoAug 6, 2025
  41. Patrick SteinhardtAug 7, 2025
  42. 04/10 commit-graph: fix sign comparison warningsPatrick Steinhardt, Aug 6, 2025
  43. 05/10 commit-graph: stop using `the_hash_algo` via macrosPatrick Steinhardt, Aug 6, 2025
  44. 06/10 commit-graph: store the hash algorithm instead of its lengthPatrick Steinhardt, Aug 6, 2025
  45. 07/10 commit-graph: refactor `parse_commit_graph()` to take a repositoryPatrick Steinhardt, Aug 6, 2025
  46. 08/10 commit-graph: stop using `the_hash_algo`Patrick Steinhardt, Aug 6, 2025
  47. 09/10 commit-graph: stop using `the_repository`Patrick Steinhardt, Aug 6, 2025
  48. 10/10 commit-graph: stop passing in redundant repositoryPatrick Steinhardt, Aug 6, 2025
  49. 00/10 commit-graph: remove reliance on global statePatrick Steinhardt, Aug 7, 2025
  50. 01/10 trace2: introduce function to trace unsigned integersPatrick Steinhardt, Aug 7, 2025
  51. 02/10 commit-graph: stop using signed integers to count Bloom filtersPatrick Steinhardt, Aug 7, 2025
  52. 03/10 commit-graph: fix type for some write optionsPatrick Steinhardt, Aug 7, 2025
  53. Junio C HamanoAug 7, 2025
  54. Patrick SteinhardtAug 11, 2025
  55. 04/10 commit-graph: fix sign comparison warningsPatrick Steinhardt, Aug 7, 2025
  56. 05/10 commit-graph: stop using `the_hash_algo` via macrosPatrick Steinhardt, Aug 7, 2025
  57. 06/10 commit-graph: store the hash algorithm instead of its lengthPatrick Steinhardt, Aug 7, 2025
  58. 07/10 commit-graph: refactor `parse_commit_graph()` to take a repositoryPatrick Steinhardt, Aug 7, 2025
  59. 08/10 commit-graph: stop using `the_hash_algo`Patrick Steinhardt, Aug 7, 2025
  60. 09/10 commit-graph: stop using `the_repository`Patrick Steinhardt, Aug 7, 2025
  61. 10/10 commit-graph: stop passing in redundant repositoryPatrick Steinhardt, Aug 7, 2025
  62. 0/6 commit-graph: remove reliance on global statePatrick Steinhardt, Aug 15, 2025
  63. 1/6 commit-graph: stop using `the_hash_algo` via macrosPatrick Steinhardt, Aug 15, 2025
  64. 2/6 commit-graph: store the hash algorithm instead of its lengthPatrick Steinhardt, Aug 15, 2025
  65. 3/6 commit-graph: refactor `parse_commit_graph()` to take a repositoryPatrick Steinhardt, Aug 15, 2025
  66. 4/6 commit-graph: stop using `the_hash_algo`Patrick Steinhardt, Aug 15, 2025
  67. 5/6 commit-graph: stop using `the_repository`Patrick Steinhardt, Aug 15, 2025
  68. 6/6 commit-graph: stop passing in redundant repositoryPatrick Steinhardt, Aug 15, 2025
  69. Derrick StoleeAug 15, 2025

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