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From: Olamide Caleb Bello <belkid98@gmail•com>
To: git@vger•kernel.org
Cc: phillip.wood123@gmail•com, gitster@pobox•com,
	christian.couder@gmail•com, usmanakinyemi202@gmail•com,
	kaartic.sivaraam@gmail•com, me@ttaylorr•com,
	karthik.188@gmail•com, Olamide Caleb Bello <belkid98@gmail•com>
Subject: [Outreachy PATCH v3 1/3] environment: stop storing `core.attributesFile` globally
Date: Sat, 17 Jan 2026 21:59:26 +0100	[thread overview]
Message-ID: <1aa41da8334296e4c1063b81fc40ec3b1dcdcb7b.1768681947.git.belkid98@gmail.com> (raw)
In-Reply-To: <cover.1768681947.git.belkid98@gmail.com>

The config value is parsed in git_default_core_config(), loaded eagerly
and stored in the global variable `git_attributes_file`.
Storing this value in a global variable can lead to unexpected
behaviours when more than one Git repository run in the same Git process.

Create a new struct `repo_config_values` to hold this value and
other repository dependent values parsed by `git_default_config()` and
can be accessed per repository via `git_default_config()`.
This will ensure the current behaviour remains the same while also
enabling the libification of Git.

It is important to note that `git_default_config()` is a wrapper to other
`git_default_*_config()` such as `git_default_core_config()`.
Therefore to access and modify this global variable,
the change has to be made in the function which parses and
stores the value in the global variable.

Suggested-by: Phillip Wood <phillip.wood123@gmail•com>
Mentored-by: Christian Couder <christian.couder@gmail•com>
Mentored-by: Usman Akinyemi <usmanakinyemi202@gmail•com>
Signed-off-by: Olamide Caleb Bello <belkid98@gmail•com>
---
 attr.c        |  7 ++++---
 environment.c | 12 +++++++++---
 environment.h |  9 ++++++++-
 repository.c  |  1 +
 repository.h  |  4 ++++
 5 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/attr.c b/attr.c
index 4999b7e09d..fbb9eaffaf 100644
--- a/attr.c
+++ b/attr.c
@@ -881,10 +881,11 @@ const char *git_attr_system_file(void)
 
 const char *git_attr_global_file(void)
 {
-	if (!git_attributes_file)
-		git_attributes_file = xdg_config_home("attributes");
+	struct repo_config_values *cfg = &the_repository->config_values;
+	if (!cfg->attributes_file_path)
+		cfg->attributes_file_path = xdg_config_home("attributes");
 
-	return git_attributes_file;
+	return cfg->attributes_file_path;
 }
 
 int git_attr_system_is_enabled(void)
diff --git a/environment.c b/environment.c
index a770b5921d..283db0a1a0 100644
--- a/environment.c
+++ b/environment.c
@@ -53,7 +53,6 @@ char *git_commit_encoding;
 char *git_log_output_encoding;
 char *apply_default_whitespace;
 char *apply_default_ignorewhitespace;
-char *git_attributes_file;
 int zlib_compression_level = Z_BEST_SPEED;
 int pack_compression_level = Z_DEFAULT_COMPRESSION;
 int fsync_object_files = -1;
@@ -327,6 +326,8 @@ static enum fsync_component parse_fsync_components(const char *var, const char *
 static int git_default_core_config(const char *var, const char *value,
 				   const struct config_context *ctx, void *cb)
 {
+	struct repo_config_values *cfg = &the_repository->config_values;
+
 	/* This needs a better name */
 	if (!strcmp(var, "core.filemode")) {
 		trust_executable_bit = git_config_bool(var, value);
@@ -364,8 +365,8 @@ static int git_default_core_config(const char *var, const char *value,
 	}
 
 	if (!strcmp(var, "core.attributesfile")) {
-		FREE_AND_NULL(git_attributes_file);
-		return git_config_pathname(&git_attributes_file, var, value);
+		FREE_AND_NULL(cfg->attributes_file_path);
+		return git_config_pathname(&cfg->attributes_file_path, var, value);
 	}
 
 	if (!strcmp(var, "core.bare")) {
@@ -756,3 +757,8 @@ int git_default_config(const char *var, const char *value,
 	/* Add other config variables here and to Documentation/config.adoc. */
 	return 0;
 }
+
+void repo_config_values_init(struct repo_config_values *cfg)
+{
+	cfg->attributes_file_path = NULL;
+}
diff --git a/environment.h b/environment.h
index 51898c99cd..aea73ff25b 100644
--- a/environment.h
+++ b/environment.h
@@ -84,6 +84,12 @@ extern const char * const local_repo_env[];
 
 struct strvec;
 
+/* Config values parsed by git_default_config() */
+struct repo_config_values {
+	/* core config values */
+	char *attributes_file_path;
+};
+
 /*
  * Wrapper of getenv() that returns a strdup value. This value is kept
  * in argv to be freed later.
@@ -107,6 +113,8 @@ const char *strip_namespace(const char *namespaced_ref);
 int git_default_config(const char *, const char *,
 		       const struct config_context *, void *);
 
+void repo_config_values_init(struct repo_config_values *cfg);
+
 /*
  * TODO: All the below state either explicitly or implicitly relies on
  * `the_repository`. We should eventually get rid of these and make the
@@ -152,7 +160,6 @@ extern int assume_unchanged;
 extern int warn_on_object_refname_ambiguity;
 extern char *apply_default_whitespace;
 extern char *apply_default_ignorewhitespace;
-extern char *git_attributes_file;
 extern int zlib_compression_level;
 extern int pack_compression_level;
 extern unsigned long pack_size_limit_cfg;
diff --git a/repository.c b/repository.c
index c7e75215ac..d308cd78bf 100644
--- a/repository.c
+++ b/repository.c
@@ -57,6 +57,7 @@ void initialize_repository(struct repository *repo)
 	ALLOC_ARRAY(repo->index, 1);
 	index_state_init(repo->index, repo);
 	repo->check_deprecated_config = true;
+	repo_config_values_init(&repo->config_values);
 
 	/*
 	 * When a command runs inside a repository, it learns what
diff --git a/repository.h b/repository.h
index 6063c4b846..638a142577 100644
--- a/repository.h
+++ b/repository.h
@@ -3,6 +3,7 @@
 
 #include "strmap.h"
 #include "repo-settings.h"
+#include "environment.h"
 
 struct config_set;
 struct git_hash_algo;
@@ -148,6 +149,9 @@ struct repository {
 	/* Repository's compatibility hash algorithm. */
 	const struct git_hash_algo *compat_hash_algo;
 
+	/* Repository's config values parsed by git_default_config() */
+	struct repo_config_values config_values;
+
 	/* Repository's reference storage format, as serialized on disk. */
 	enum ref_storage_format ref_storage_format;
 
-- 
2.34.1


  reply	other threads:[~2026-01-17 21:02 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-12 12:59 [Outreachy PATCH RFC 0/3] store git_default_config() parsed values in new config struct Olamide Caleb Bello
2026-01-12 12:59 ` [Outreachy PATCH RFC 1/3] environment: stop storing `core.attributesFile` globally Olamide Caleb Bello
2026-01-12 14:29   ` Phillip Wood
2026-01-12 15:05     ` Bello Olamide
2026-01-12 12:59 ` [Outreachy PATCH RFC 2/3] environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-01-12 12:59 ` [Outreachy PATCH RFC 3/3] environment: move "branch.autoSetupMerge" into `struct config_values` Olamide Caleb Bello
2026-01-13 16:43 ` [Outreachy PATCH v2 0/3] store git_default_config() parsed values in new config struct Olamide Caleb Bello
2026-01-13 16:44   ` [Outreachy PATCH v2 1/3] environment: stop storing `core.attributesFile` globally Olamide Caleb Bello
2026-01-13 19:26     ` Junio C Hamano
2026-01-14  6:59       ` Bello Olamide
2026-01-13 16:44   ` [Outreachy PATCH v2 2/3] environment: environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-01-13 19:38     ` Junio C Hamano
2026-01-14  7:16       ` Bello Olamide
2026-01-13 16:44   ` [Outreachy PATCH v2 3/3] environment: move "branch.autoSetupMerge" into `struct repo_config_values` Olamide Caleb Bello
2026-01-13 19:53     ` Junio C Hamano
2026-01-14  7:40       ` Bello Olamide
2026-01-15 22:17   ` [Outreachy PATCH v2 0/3] store git_default_config() parsed values in new config struct Bello Olamide
2026-01-17 20:59   ` [Outreachy PATCH v3 0/3] store repo specific config values in new `struct repo_config_values` Olamide Caleb Bello
2026-01-17 20:59     ` Olamide Caleb Bello [this message]
2026-01-22 12:13       ` [Outreachy PATCH v3 1/3] environment: stop storing `core.attributesFile` globally Toon Claes
2026-01-22 15:08         ` Bello Olamide
2026-01-22 14:40       ` Phillip Wood
2026-01-22 15:11         ` Bello Olamide
2026-01-17 20:59     ` [Outreachy PATCH v3 2/3] environment: environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-01-22 12:13       ` Toon Claes
2026-01-22 15:17         ` Bello Olamide
2026-01-22 14:41       ` Phillip Wood
2026-01-22 15:29         ` Bello Olamide
2026-01-23 10:43           ` Phillip Wood
2026-01-23 13:24             ` Bello Olamide
2026-01-17 20:59     ` [Outreachy PATCH v3 3/3] environment: move "branch.autoSetupMerge" into `struct repo_config_values` Olamide Caleb Bello
2026-01-22 14:41       ` Phillip Wood
2026-01-22 15:29         ` Bello Olamide
2026-01-20 15:19     ` [Outreachy PATCH v3 0/3] store repo specific config values in new " Bello Olamide
2026-01-24 11:55     ` [Outreachy PATCH v4 " Olamide Caleb Bello
2026-01-24 11:55       ` [Outreachy PATCH v4 1/3] environment: stop storing `core.attributesFile` globally Olamide Caleb Bello
2026-01-24 11:55       ` [Outreachy PATCH v4 2/3] environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-01-24 11:55       ` [Outreachy PATCH v4 3/3] environment: move "branch.autoSetupMerge" into `struct repo_config_values` Olamide Caleb Bello
2026-01-24 12:21       ` [Outreachy PATCH v5 0/3] store repo specific config values in new " Olamide Caleb Bello
2026-01-24 12:21         ` [Outreachy PATCH v5 1/3] environment: stop storing `core.attributesFile` globally Olamide Caleb Bello
2026-01-29 18:01           ` Junio C Hamano
2026-01-24 12:21         ` [Outreachy PATCH v5 2/3] environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-01-29 18:12           ` Junio C Hamano
2026-01-24 12:21         ` [Outreachy PATCH v5 3/3] environment: move "branch.autoSetupMerge" into `struct repo_config_values` Olamide Caleb Bello
2026-01-29 18:37           ` Junio C Hamano
2026-01-30 16:20             ` Junio C Hamano
2026-01-30 20:15               ` Junio C Hamano
2026-01-29  8:29         ` [Outreachy PATCH v5 0/3] store repo specific config values in new " Bello Olamide
2026-02-03 15:42         ` [Outreachy PATCH v6 " Olamide Caleb Bello
2026-02-03 15:42           ` [Outreachy PATCH v6 1/3] environment: stop storing `core.attributesFile` globally Olamide Caleb Bello
2026-02-04 16:39             ` Phillip Wood
2026-02-09  8:47               ` Bello Olamide
2026-02-07  1:14             ` Junio C Hamano
2026-02-08 11:14               ` Phillip Wood
2026-02-09  8:54                 ` Bello Olamide
2026-02-10  8:40                 ` Bello Olamide
2026-02-03 15:42           ` [Outreachy PATCH v6 2/3] environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-02-04 16:55             ` Phillip Wood
2026-02-03 15:42           ` [Outreachy PATCH v6 3/3] environment: move "branch.autoSetupMerge" into `struct repo_config_values` Olamide Caleb Bello
2026-02-04 16:57           ` [Outreachy PATCH v6 0/3] store repo specific config values in new " Phillip Wood
2026-02-16 16:38         ` [Outreachy PATCH v7 " Olamide Caleb Bello
2026-02-16 16:38           ` [Outreachy PATCH v7 1/3] environment: stop storing `core.attributesFile` globally Olamide Caleb Bello
2026-02-16 16:38           ` [Outreachy PATCH v7 2/3] environment: stop using core.sparseCheckout globally Olamide Caleb Bello
2026-02-26 12:57             ` Christian Couder
2026-02-26 15:23               ` Junio C Hamano
2026-02-26 16:24                 ` Bello Olamide
2026-02-16 16:38           ` [Outreachy PATCH v7 3/3] environment: move "branch.autoSetupMerge" into `struct repo_config_values` Olamide Caleb Bello
2026-02-17 20:08           ` [Outreachy PATCH v7 0/3] store repo specific config values in new " Junio C Hamano
2026-02-18 11:27             ` Bello Olamide
2026-02-26 13:03             ` Christian Couder
2026-02-26 15:19               ` Junio C Hamano

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