[PATCH] Make 'trust_executable_bit' repository-scoped

[drona <dronarajgyawali@gmail.com>]

From: Dorna Raj Gyawali <dronarajgyawali@gmail.com>

- Moved 'trust_executable_bit' from a global variable to
  struct repo_settings.
- Updated all calls to ce_mode_from_stat() to pass the repository.
- Updated environment.c to set the repository's trust_executable_bit
  when reading core.filemode.
- Fixed apply.c, update-index.c, diff-lib.c, and read-cache.c to
  reference the_repository->settings.trust_executable_bit.
- Added prepare_repo_settings() call in diff-lib.c to ensure repo
  settings are loaded.

This change makes executable-bit handling repository-scoped and
prepares the code for multi-repo support.

Signed-off-by: Dorna Raj Gyawali <dronarajgyawali@gmail.com>
---
 apply.c       | 2 +-
 diff-lib.c    | 9 +++++----
 environment.c | 1 +
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/apply.c b/apply.c
index f9fd7b0030..1677ddca15 100644
--- a/apply.c
+++ b/apply.c
@@ -3838,7 +3838,7 @@ static int check_preimage(struct apply_state *state,
 		if (*ce && !(*ce)->ce_mode)
 			BUG("ce_mode == 0 for path '%s'", old_name);
 
-		if (the_repository->settings.trust_executable_bit  || !S_ISREG(st->st_mode))
+		if (the_repository->settings.trust_executable_bit || !S_ISREG(st->st_mode))
 			st_mode = ce_mode_from_stat(the_repository, *ce, st->st_mode);
 		else if (*ce)
 			st_mode = (*ce)->ce_mode;
diff --git a/diff-lib.c b/diff-lib.c
index 894358c8b0..276efef407 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -108,6 +108,7 @@ static int match_stat_with_submodule(struct diff_options *diffopt,
 
 void run_diff_files(struct rev_info *revs, unsigned int option)
 {
+	prepare_repo_settings(revs->repo);
 	int entries, i;
 	int diff_unmerged_stage = revs->max_count;
 	unsigned ce_option = ((option & DIFF_RACY_IS_MODIFIED)
@@ -160,7 +161,7 @@ void run_diff_files(struct rev_info *revs, unsigned int option)
 
 			changed = check_removed(ce, &st);
 			if (!changed)
-				wt_mode = ce_mode_from_stat(the_repository, ce, st.st_mode);
+				wt_mode = ce_mode_from_stat(revs->repo, ce, st.st_mode);
 			else {
 				if (changed < 0) {
 					perror(ce->name);
@@ -193,7 +194,7 @@ void run_diff_files(struct rev_info *revs, unsigned int option)
 					num_compare_stages++;
 					oidcpy(&dpath->parent[stage - 2].oid,
 					       &nce->oid);
-					dpath->parent[stage-2].mode = ce_mode_from_stat(the_repository,nce, mode);
+					dpath->parent[stage-2].mode = ce_mode_from_stat(revs->repo, nce, mode);
 					dpath->parent[stage-2].status =
 						DIFF_STATUS_MODIFIED;
 				}
@@ -262,7 +263,7 @@ void run_diff_files(struct rev_info *revs, unsigned int option)
 				continue;
 			} else if (revs->diffopt.ita_invisible_in_index &&
 				   ce_intent_to_add(ce)) {
-				newmode = ce_mode_from_stat(the_repository, ce, st.st_mode);
+				newmode = ce_mode_from_stat(revs->repo, ce, st.st_mode);
 				diff_addremove(&revs->diffopt, '+', newmode,
 					       null_oid(the_hash_algo), 0, ce->name, 0);
 				continue;
@@ -270,7 +271,7 @@ void run_diff_files(struct rev_info *revs, unsigned int option)
 
 			changed = match_stat_with_submodule(&revs->diffopt, ce, &st,
 							    ce_option, &dirty_submodule);
-			newmode = ce_mode_from_stat(the_repository, ce, st.st_mode);
+			newmode = ce_mode_from_stat(revs->repo, ce, st.st_mode);
 		}
 
 		if (!changed && !dirty_submodule) {
diff --git a/environment.c b/environment.c
index 591683ce8c..9d12c5fa56 100644
--- a/environment.c
+++ b/environment.c
@@ -304,6 +304,7 @@ int git_default_core_config(const char *var, const char *value,
 
 	/* This needs a better name */
 	if (!strcmp(var, "core.filemode")) {
+		prepare_repo_settings(the_repository);
 		the_repository->settings.trust_executable_bit = git_config_bool(var, value);
 		return 0;
 	}
-- 
2.43.0