[tz_unix] add lookup for TZDIR environment variable

1 files changed, 12 insertions, 0 deletions

diff --git a/core/time/timezone/tz_unix.odin b/core/time/timezone/tz_unix.odin
index d940e47be..542e5c4f2 100644
--- a/core/time/timezone/tz_unix.odin
+++ b/core/time/timezone/tz_unix.odin
@@ -81,6 +81,18 @@ _region_load :: proc(_reg_str: string, allocator := context.allocator) -> (out_r
 	}
 	defer if _reg_str == "local" { delete(reg_str, allocator) }
 
+	tzdir_str, tzdir_ok := os.lookup_env("TZDIR", allocator)
+	defer if tzdir_ok { delete(tzdir_str, allocator) }
+
+	if tzdir_ok {
+		region_path := filepath.join({tzdir_str, reg_str}, allocator)
+		defer delete(region_path, allocator)
+		
+		if tz_reg, ok := load_tzif_file(region_path, reg_str, allocator); ok {
+			return tz_reg, true
+		}
+	}
+
 	db_paths := []string{"/usr/share/zoneinfo", "/share/zoneinfo", "/etc/zoneinfo"}
 	for db_path in db_paths {
 		region_path := filepath.join({db_path, reg_str}, allocator)