[PATCH v3 0/1] move excludes_file into repo_config_values

[Tian Yuchen <cat@malon.dev>]

This patch continues the libification effort by migrating the global
string variable 'excludes_file' into 'struct repo_config_values'. Since
this is a dynamically allocated variable, the migration requires proper
heap memory management.

This patch mainly does three things:

 - Abstract the XDG fallback lazy-loading logic out of dir.c into a proper
 getter.

 - Move the variables into the struct repo_config_values.

 - Introduce the memory destructor 'repo_config_values_clear()'.


Changes since V2:

 - Squash together the previous two commits into one.

 - The 'repo->initialized' check is used in both the getter and destructor.
 This eliminates redundant checks and follows the fail-fast principle. This
 is consistent with the previous global variable removal patches [1][2][3].

Thanks!

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>

[1] https://lore.kernel.org/git/20260610093635.139719-1-cat@malon.dev/T/#m856253610936d052a798259bfc06d598561e53c4
[2] https://lore.kernel.org/git/20260606143412.15443-1-cat@malon.dev/
[3] https://lore.kernel.org/git/20260617154929.564498-2-cat@malon.dev/T/#m8843984a6175a1a4c7e00877085c77b0c72f5803

Tian Yuchen (1):
  environment: move excludes_file into repo_config_values

 dir.c         |  4 ++--
 environment.c | 30 +++++++++++++++++++++++++++---
 environment.h | 13 ++++++++++++-
 repository.c  |  1 +
 4 files changed, 42 insertions(+), 6 deletions(-)

-- 
2.43.0