[PATCH v2 2/2] environment: migrate assume_unchanged into repo_config_values

[Tian Yuchen <cat@malon.dev>]

Move the global 'assume_unchanged' configuration into the
repository-specific 'repo_config_values' struct.

We do not introduce a getter for it because the readers are
limited and no hardcoded fallback values are needed.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Ayush Chandekar <ayu.chandekar@gmail.com>
Mentored-by: Olamide Caleb Bello <belkid98@gmail.com>
Signed-off-by: Tian Yuchen <cat@malon.dev>
---
 builtin/update-index.c | 3 ++-
 environment.c          | 4 ++--
 environment.h          | 2 +-
 read-cache.c           | 9 ++++++---
 4 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/builtin/update-index.c b/builtin/update-index.c
index 4c4b39a157..3ef7e9bb90 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -419,6 +419,7 @@ static int add_cacheinfo(unsigned int mode, const struct object_id *oid,
 {
 	int len, option;
 	struct cache_entry *ce;
+	struct repo_config_values *cfg = repo_config_values(the_repository);
 
 	if (!verify_path(path, mode))
 		return error("Invalid path '%s'", path);
@@ -431,7 +432,7 @@ static int add_cacheinfo(unsigned int mode, const struct object_id *oid,
 	ce->ce_flags = create_ce_flags(stage);
 	ce->ce_namelen = len;
 	ce->ce_mode = create_ce_mode(mode);
-	if (assume_unchanged)
+	if (cfg->assume_unchanged)
 		ce->ce_flags |= CE_VALID;
 	option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 	option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
diff --git a/environment.c b/environment.c
index 53623518c7..12659c1d9c 100644
--- a/environment.c
+++ b/environment.c
@@ -44,7 +44,6 @@ static int zlib_compression_seen;
 int trust_executable_bit = 1;
 int has_symlinks = 1;
 int minimum_abbrev = 4, default_abbrev = -1;
-int assume_unchanged;
 char *git_commit_encoding;
 char *git_log_output_encoding;
 char *apply_default_whitespace;
@@ -355,7 +354,7 @@ int git_default_core_config(const char *var, const char *value,
 	}
 
 	if (!strcmp(var, "core.ignorestat")) {
-		assume_unchanged = git_config_bool(var, value);
+		cfg->assume_unchanged = git_config_bool(var, value);
 		return 0;
 	}
 
@@ -737,6 +736,7 @@ void repo_config_values_init(struct repo_config_values *cfg)
 	cfg->check_stat = 1;
 	cfg->zlib_compression_level = Z_BEST_SPEED;
 	cfg->pack_compression_level = Z_DEFAULT_COMPRESSION;
+	cfg->assume_unchanged = 0;
 	cfg->precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
 	cfg->core_sparse_checkout_cone = 0;
 	cfg->sparse_expect_files_outside_of_patterns = 0;
diff --git a/environment.h b/environment.h
index 2e0f8beac0..3a391338e3 100644
--- a/environment.h
+++ b/environment.h
@@ -95,6 +95,7 @@ struct repo_config_values {
 	int check_stat;
 	int zlib_compression_level;
 	int pack_compression_level;
+	int assume_unchanged;
 	int precomposed_unicode;
 	int core_sparse_checkout_cone;
 	int warn_on_object_refname_ambiguity;
@@ -183,7 +184,6 @@ int have_git_dir(void);
 extern int trust_executable_bit;
 extern int has_symlinks;
 extern int minimum_abbrev, default_abbrev;
-extern int assume_unchanged;
 extern char *apply_default_whitespace;
 extern char *apply_default_ignorewhitespace;
 
diff --git a/read-cache.c b/read-cache.c
index 38b55323dd..643b13f1fb 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -192,9 +192,11 @@ void rename_index_entry_at(struct index_state *istate, int nr, const char *new_n
  */
 void fill_stat_cache_info(struct index_state *istate, struct cache_entry *ce, struct stat *st)
 {
+	struct repo_config_values *cfg = repo_config_values(the_repository);
+
 	fill_stat_data(&ce->ce_stat_data, st);
 
-	if (assume_unchanged)
+	if (cfg->assume_unchanged)
 		ce->ce_flags |= CE_VALID;
 
 	if (S_ISREG(st->st_mode)) {
@@ -1346,6 +1348,7 @@ static struct cache_entry *refresh_cache_ent(struct index_state *istate,
 {
 	struct stat st;
 	struct cache_entry *updated;
+	struct repo_config_values *cfg = repo_config_values(the_repository);
 	int changed;
 	int refresh = options & CE_MATCH_REFRESH;
 	int ignore_valid = options & CE_MATCH_IGNORE_VALID;
@@ -1405,7 +1408,7 @@ static struct cache_entry *refresh_cache_ent(struct index_state *istate,
 		 * is not marked VALID, this is the place to mark it
 		 * valid again, under "assume unchanged" mode.
 		 */
-		if (ignore_valid && assume_unchanged &&
+		if (ignore_valid && cfg->assume_unchanged &&
 		    !(ce->ce_flags & CE_VALID))
 			; /* mark this one VALID again */
 		else {
@@ -1440,7 +1443,7 @@ static struct cache_entry *refresh_cache_ent(struct index_state *istate,
 	 * (i.e. things to be edited) will reacquire CE_VALID bit
 	 * automatically, which is not really what we want.
 	 */
-	if (!ignore_valid && assume_unchanged &&
+	if (!ignore_valid && cfg->assume_unchanged &&
 	    !(ce->ce_flags & CE_VALID))
 		updated->ce_flags &= ~CE_VALID;
 
-- 
2.43.0